List of Telecom Acronyms

Fast Access by initial character

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

1

1TR6
1. Technische Richtlinie Nr. 6 (German) [German ISDN standard, will be replaced by 1999 by DSS1]

A

A/M
Agent/Manager
AAB
Automatic Alternative Billing
AAL
ATM Adaptation Layer [procedures to map ATM layer information into higher levels]
ABI
Application Binary Interface
ABR
Available Bit Rate [vs. CBR or VBR]
ABS
Alternate Billing Services
AC
Alarm Code(1)

Access Concentrator(2)
Authentication Center(3) [(German) Berechtigungszentrum]
ACA
Automated Cable Analysis
ACC
Automatic Congestion Control [congested switches automatically communicate their congestion level to other switches]
AcceSS7
[HP Distributed solution for monitoring and surveillance of SS7 networks, based on probes]
ACD
Automatic Call Distribution [private system service that routes calls to stations based on customer needs]
ACE
Application Creation Environment(1)

Advanced Computing Environment(2)
Adaptive Communication Environment(3)
ACG
? Call Gapping
ACIS
Advanced Cago Information System [(satellite based) data network for monitoring the progress of cargo through ports and by rail, UNCTAD stimulated]
ACL
Application Connectivity Link(1) [e.g. used by SIEMENS Hicom telephone equipment]

Access Control List (facility)(2) [part of the DCE security service]
ACM
Address CoMplete [B-ISDN user part message]
ACMA
Automatic Customer Name and Address
ACO
Alarm Cut-Off
ACP
Action Control Point(1) [user offices that provide access and interfaces to generally centralized NCPs]

Access Communication Processor(2)
ACSE
Association Control Service Entity (or Element) [in the OSI model an application-layer protocol that is used to establish and terminate an association between applications on the same or different systems; (german) Funktionseinheit zum Auf- und Abbau von Schicht-7-Verbindungen]
ACT
Advanced (or Applied) Computerised Telephony
ACTS
Advanced Communications Technologies and Services [EU research and development program, starts 1995, 630MEcu, devoted to projects in developing the European information highway]
ADC
American Digital Cellular(1) [US mobile phone standard equivalent to GSM]

Asynchronous Device Configuration(2) [alarm filtering in FMS, menu driven]
ADD
Architectural Design Document [leads to DDD]
ADE
Above Decks Equipment
ADM
Add-Drop Multiplex(ers)(1) [aka drop-insert multiplexes, used for SDH networks]

Application Development & Management(2)
ADPCM
Adaptive Differential Pulse Code Modulation
ADSL
Asymmetric Digital Subscriber Line [broadband standard with 7.5 Megabit/sec and reply channel with 384 Kilobit/sec, based on copper lines]
ADTS
Advanced Digital Terminal System
AE
Alarmeingang(1) (German)

Application Entity(2)
AEK
AE-Kennung (German)
AEN
AE-Nummer (German)
AERM
Alignment Error Rate Monitor [used in network and transmission troubleshooting]
AES
Application Environment Specification [by OSF]
AFC
Application Foundation Classes [published by Microsoft; collection of platform independent class libraries; written in Java, based on AWT]
AFR
Annual Failure Rate
AFS
Andrew File System [comparable with NFS]
AGCH
Access Grant Channel
AGK
Anlagen- und Geraetekonfiguration (German)
AH
Alarm Handler(1)

Authentication Header(2)
AIC
Adaptation and Integration Center [HP internal]
AIN
Advanced Intelligent Network [architectural concept for the creation and provision of telecom services. The local exchange carriers in the U.S. are developing the next generation of network technology, called the Advanced Intelligent Network. This technology promises to bring advanced capabilities to residential, business, and mobile customers on the local network level - capabilities that previously have been available either only in the long-distance networks or not at all.]
AIP
ATM Interface Processor
AIS
Alarm Indication Signal
ALK
Alarmerfassungs- und Loopsteuerkonzentrator (German)
ALM
Alarmmelde- und Loopsteuerbaugruppe (German)
ALMA
Alcatel Management Applications
ALMAP
Alcatel MAnagement Platform
AM
Accounting Management
AMI
Alternate Mark Inversion [line encoding scheme for transmitting data bits over T1 transmission systems]
AMIC
AMericas Integration Center
AMP
Account Management Plan
AMPS
Advanced Mobile Phone System
AMS
Alarm Management System
AN
Access Network
ANI
Automatic Number Identification [number of the calling station]
ANM
Autonomous Network Manager(1)

Answer(2) [B-ISDN user part message]
ANR
Automatic Network Routing
ANSI
American National Standards Institute
ANT
Applied Network Technology Inc. [telecom switch provider]
AoC
Advice of Charge
AOM
Application OSI(1) Management (Profile)
AP
Application Program
APCG
ATM Pilot Coordination Group
API
Application Programming Interface [e.g. based on XMP]
APPC
Advanced Program-to-Program Communication
APPLET
mini APPLication [Java language program]
APPN
Advanced Peer-to-Peer Networking (in SNA networks)
APS
Automatic Protection Switch
ARF
Application Registration File [used for integrating a map builder in OV]
ARM
Application Response Measurement API [open API for end-to-end measurement of application transactions; based on a collaboration between HP RPM/OV program and Tivoli/IBM]
ARP
Address Resolution Protocol [TCP/IP based, to bind an IP address to a LLA(1)]
ARPA
Advanced Research Project Agency
ARS
Action Request System [Remedy product for managing trouble tickets]
AS
Alarmstufe(1) (German)

Associated Signaling(2) [a signaling link is routed in parallel with each transmission route between signaling points, requiring each signaling point to have signaling links to every other signaling point in the network]
Authentication Server(3) [part of the DCE security service]
Authorization Server(4)
ASB
Alarmsignalbearbeitung (German)
ASC
Available Spare Capacity(1)

AIN Switch Capabilities(2)
ASE
Alarmsignalerfassung(1) (German)

Application Service Element(2)
ASI
Alarmsignalinitialisierung (German)
ASIC
Application Specific Integrated Circuit
ASN.1
Abstract Syntax Notation One [OSI(1) standard for encoding and decoding information, used by CMIP and - as a subset - SNMP for defining low level MIB objects; machine independent formal description language for the data itself and information regarding the type of data, composed of a transaction segment and a component segment, presentation Layer service, see also SMI]
ASPI
Advanced SCSI Programming Interface
ASR
Answer Seize Ratio(1) [NMAS performance indicator]

Automated Speech Recognition(2)
Automatic Set Relocation(3)
AST
Acceptance and System Test [part of SVVP]
ASV
Alarmsignalverknuepfung (German)
ATA
AT Attachment [bus alike PC peripheral interface]
ATC
ATM Transfer Capability
ATCS
Advanced Timed Channel Selection [based on FHSS. Wireless transmission method supports transfer rates of 625kb/s, by periodically - each 7 ms - changing to one of 80 parallel channels or frequencies]
ATG
Advanced Technology Groups
ATM
Asynchronous Transfer Mode [base for future broadband ISDN, 53 Byte packets, current standards: SONET/SDH, DS3, TAXI and Fiber Channel system, user network interface has to support bandwidths of 155 Mbs or 600 Mbs. An international ISDN high-speed, high-volume, packet-switching transmission protocol standard. ATM uses short, uniform, 53-byte cells to divide data into efficient, manageable packets for ultrafast switching through a high-performance communications network. The 53-byte cells contain 5-byte destination address headers and 48 data bytes. ATM is the first packet-switched technology designed from the ground up to support integrated voice, video and data communication applications. It is well-suited to high-speed WAN transmission bursts. ATM currently accommodates transmission speeds from 64 Kbps to 622 Mbps. ATM may support gigabit speeds in the future.]
ATMS
Assumption-Based Truth Maintenance System
ATO
Australian Telecom Operation [HP division]
ATP
Advanced Technology Program(1)

Acceptance Test Procedure(2)
ATU-C
ADSL Transmission Unit - Central Office
ATU-R
ADSL Transmission Unit - Remote
ATS
Acceptance Test Specification
AU
Administration Unit(1)

Access Unit(2)
Alarmunterdrueckung(3) (German)
AUC
Authentication Centre
AUI
Attachment (or Autonomous) Unit Interface
AV
Alarm Viewer [e.g. part of FMP. Interface between alarm handler and operator]
AVA
Attribute Value Assertion [to identify a MO within the scope of is superior object]
AWT
Abstract Windowing Toolkit [Java's platform- independent windowing, graphics and user-interface toolkit]
AXE
[Ericsson switch]
AZNR
Alarm-Zettel-Nummer (German)

B

B-DCN
Backbone Data Communications Network
B-ISDN
Broadband ISDN [usually implemented using ATM, with bandwidths from 10 Mbs to 155 Mbs]
BACP
Bandwidth Allocation Control Protocol
BAF
Bellcore Accounting Format [standard billing format]
BAIC
Barring of All Incoming Calls
BAM
Bell Atlantic Mobile [US network provider]
BAOC
Barring of All Outgoing Calls
BAP
Bandwidth Allocation Protocol
BAS
(Mobitex) BASe station [ transmitting data packages between terminal radio modem and BAS with 8kb/s, see also BTS]
BB
Base Band
BBN
(German) BundesBehoerdenNetz
BBS
Bulletin Board System [newsgroup service in the Internet]
BC
Bearer Capability
BCC
Block Check Character(1)

Bellcore Client Company(2)
BCCH
Broadcast Control Channel
BCF
Bearer Control Function
BCM
Basic Call Model
BCP
Basic Call Process
BCR
Block Cell Rate
BCS
Block Check Sequence
BCTS
Backup Courier Time Server [backup for a CTS]
BD
Betriebsdaten (German)
BDA
BD-Analyse (German)
BDAT
Best Demonstrable Achievable Technology
BDB
BD-Bearbeitung (German)
BDE
BD-Erhebung (German)
BE
BeschaltungsEinheit (German)
BECN
Backward Explicit Congestion Notification [notifiying bit, informing a DTE about an overload situation]
BEDOS
BEleg-DOkumentationsSystem (German)
BER
Basic Encoding Rules(1) [method for encoding data in the OSI environment]

Bit Error Rate(2)
BERT
Bit Error Rate Test set [to be used in connectivity checking/fault diagnosis]
BF
BB Frequency
BFM
Business Function Model
BGP4
Border Gateway Protocol [replacement protocol for EGP; defined in RFC1163; BGP4 supports classless interdomain routing, enabling to reduce the size of routing tables by creating aggregate routes]
BGS
Business Group Services [or 'Advanced Centrex']
BF
Basic Function
BFS
Betriebsfuehrungssystem (German)
BFV
Betriebsfuehrungsvorfeldrechner (German) [HP9000]
BFZ
Betriebsfuehrungs-Zentraleinheit (German) [HP1000]
BHCA
Busy Hour Call Attempts
BIB
Backward Indicator Bit [part of MSU]
BIC
Barring of Incoming Calls
BIDS
Barring of Incoming Calls
BIS
Base InfraStructure
BISUP
Broadband ISDN User Part [extensions to ISUP to support BISDN services]
BITA
Business to (or and) IT Alignment
BLA
BLocking Acknowledgement [B-ISDN user part message]
BLK
Bedienungs- und Loopsteuerkonzentrator (German) [Siemens MX300]
BLO
BLOcking [B-ISDN user part message]
BLOP
Binary Large Object [e.g. graphics of a digitized document, up to GB]
BM
Business Management
BMAS
Business Management System [part of MAS]
BML
Business Management Layer
BMP
Billing Mediation Platform(1) [for collecting Call Data Records to pass them to a billing system, developed by SNO]

BER Management Protocol(2)
BMS
Billing Mediation System
BNF
Backus-Naur Form
BOA
Basic Object Adapter [part of CORBA]
BOC
Bell Operating Companies ["Baby Bells"]
BOEOC
Bit-Oriented Embedded Operations Channel
BOF
Birds Of a Feather
BOIC
Barring of Outgoing International Calls
BOIC-exHC
BOIC except those directed towards the home PLMN country
BOM
Business Object Model
BONDING
Bandwidth ON Demand INteroperability Group
BONT
Broadband Optical Network Termination
BOOTP
BOOTstrap Protocol
BOP
Bit Oriented Protocol
BP
Burst Period
BPI
Bit Per Inch
BPM
Business Process Model
BPR
Business Process Re-Engineering
BPSK
Bi-Phase Shift Keying
BRAVO
BReitbandAnwendungen in Verteilten Organisationen [pilot project of DeTeBerkom, Berlin]
BRI
Basic Rate Interface [ISDN basic connection, supports S0 interface (with 4 wires, up to 8 devices connectable, up to 2 devices operating simultaneously), 2 * 64kb/s (B channels) and 1 * 16 kb/s (D channel)]
BRPM
Business Ressouce Planning Model
BS
Base Station
BSC
Base Station Controller(1) [controlls a set of base stations, concentrates traffic to the MSC]

Business System Concept(2)
BSD
Berkeley Software Distribution [Unix specification]
BSDB
Business Services Data Base
BSI
Bundesamt fuer Sicherheit in der Informationstechnik (german) [Bonn, Tel. +49-228-9582-0, formerly: Zentralstelle fuer das Chiffrierwesen]
BSIC
Base Station Identity Code
BSN
Backward Sequence Number [part of MSU]
BSS
Business Support Systems(1)

Base Station (Sub-)System(2) [formed of BTS and BSC, connects calls to MSC]
BSSMAP
Base Station (Sub-)System Management Part
BSVCI
Broadcast Signalling VCI [part of ATM meta signalling cell, 2 Byte]
BSZ
Betriebsstellen-Schluesselzahl (German) [6 digits, e.g. 523300]
BT
British Telecom
BTN
Billing Telephone Number
BTS
Base Transceiver Station [GSM term for radio station between handset and BSC with a Cell diameter from 0.5 to 35km]
BTSM
Base Transceiver Station Management
BTX
Bildschirmtext (German)
BUS
Broadcast and Unknown Server
BV
Bearbeitungsvermerk (German)
BW
Bandwidth [part of ATM meta signalling cell, 1 Byte]

C

C
Cell loss priority field [1 bit field, part of ATM header, marks priority of transfered data]
C/I
Carrier over Interference ratio
CA
Client Application(1)

Certification Authorities(2)
Computer Associates(3)
CAC
Call (or Connection) Admission Control [ATM term]
CAF
Core ATM Functions
CAG
Chemical Analysis Group [within HP]
CAI
Client Application Interface(1)

Common Air Interface(2)
CAM
Common Access Method [programmatic interface between a host adapter (bus interface) and the operating system, used with SCSI and ATA]
CAN
Customer Access Network
CAP
Competitive Access Providers(1)

Common Application Platform(2) [layer of TMOS]
Carrierless Amplitude and Phase Modulation(3) [(German) digitales Übertragungsverfahren]
CAPI
Common ISDN API
CASE
Common Application Service Element
CAU
CAUse(1) [part of ATM meta signalling cell, 1 Byte]

Control Access Unit(2)
CAUCP
Control Access Unit Control Program
CB
Channel Bank [e.g. used for TDM with T1 (1.5Mb/s) or E1 (2Mb/s) line]
CBC
Cipher Block Chaining [encryption standard]
CBDS
Connectionless Broadband Data Service [cell based public data transport network]
CBIS
Cincinatti Bell Information System
CBL
Client Business Leads
CBM
Client Business Manager
CBO
Commercial Business Organization [within HP]
CBR
Constant Bit Rate [vs. VBR, (German) Verbindung mit einer konstanten Bitrate]
CC
Country Code(1)

Call Confirmed(2)
Call Control protocol(3)
Cross Connect(4)
Customer Care(5)
CC-NUMA
Cache Coherent Non-Uniform Memory Access [base of a consistent, binary compatible processor architecture, pioneered by Convex Computer Corporation, which HP acquired in December 95]
CCAF
Call Control Agent Function
CCB
Customer Care and Billing
CCBS
Customer Care and Billing System(1)

Completion of Call to Busy Subscribers(2) [network will automatically offer the call to the calling party when the called party is free]
CCC
Credit Card Calling
CCCH
Common Control Channel
CCE
Consistency Check End [B-ISDN user part message]
CCEA
Consistency Check End Acknowledgement[B-ISDN user part message]
CCF
Call Control Function
CCI
Command Communicator and Interpreter(1) [in FMP1.1: module, which essentially supports two-way communication between NEs and the FMP server]

Common Client Interface(2)
CCIS
Common Channel Interoffice Signaling [AT&T's name for its signaling subnetwork that transmits trunking control signals on a data link separate from message facilities]
CCITT
Commite Consultatif International Telegraphique et Telephonique [now: ITU-T, Internationaler beratender Ausschuss fuer den Telegrafen- und Telefondienst (German)]
CCL
Cambridge Consultants LGerman [developer of a multi-media communicating portable future device]
CCLA
Central CLock A [(German) Zentraltaktgeber A]
CCM
Customer Contact Manager [for building state-of-the-art customer service systems]
CCNC
Common Channel signaling Network Control
CCR
Consistency Check Request [B-ISDN user part message]
CCRA
Consistency Check Request Acknowledgement [B-ISDN user part message]
CCRSE
Commitment Concurrency and Recovery Service Element
CCS
Common Channel Signaling(1) [signaling method utilizing a separate path from the voice path]

Canadian Communication Service(2)
CCSN
Common Channel Signaling Network
CCSS
Common Channel Signaling System
CCT
Controlled Cell Transfer [ATM term]
CCV
Credit Card Verification
CD
Call Deflection(1)

Cell Delay(2) [ATM term]
CDDI
Copper Distributed Data Interface
CDE
Common Desktop Environment [graphical user interface as well as development environment, ensures run time compatibility and portability at heterogenous unix systems, opposing MS Windows NT, designed by HP (HP VUE), IBM (IBM CUA), Novell (UnixWare Client Tools) and SunSoft (Open Look Deskset Tools), available in HPUX 10.10; replaces HP VUE]
CDF
Cumulative Distribution Function(1)

Channel Definition Format(2) [introduced by Microsoft; written in XML]
CDM
Computer District Manager
CDMA
Carrier Detects Multiple Access(1)

Code Division Multiple Access(2) [developed by the military, voice is digitalized and then mixed with a random like code. Total signal (voice and random-like code) is transmitted over a wide band of frequencies (e.g. 10 Mhz). Used in industrial standard IS-95. Currently not used in mobile public phone systems yet. Vs FSMA or TDMA]
CDN
Corporate Data Network
CDPD
Cellular Digital Packet Data [wireless data networking protocol, suited for bursty data applications]
CDR
Call Detail Record(1)

Call Data Record(2)
CDS
Cell Directory Service [maintains a database of objects in a DCE cell and maps their (human readable) names to their identifiers and locations, which are used by programs to access the objects]
CDSL
Customer Premises Digital Subscriber Line
CDT
Connection-Dropping Threshold
CDV
Cell Delay Variation [influences transfer speed, ATM QOS parameter]
CDVT
Cell Delay Variation Tolerance [ATM QOS parameter]
CE
Computing Element [designator for a single independent processor in a cluster or multiprocessor system on which a separate operating system (e.g. UNIX) is running]
CEIR
Central EIR [in Dublin, contains "colour" list data about every piece of mobile equipment in circulation and details about their manufacturer, model, TAA and GSM operator]
CEN
(French) Comite Europeen de Normalisation
CEO
Chief Executive Officer [Vorstandsvorsitzender (German)]
CEPT
Conference Europeene des administration des Postes et des Telecommunications/Conference of European Postal and Telecommunication
CER
Cell Error Ratio [influences transfer accuracy, ATM QOS parameter]
CERN
Conseil Europeen pour la Recherche Nucleaire [founding institution for the WWW]
CERT
Computer Emergency Response Team [US federally funded]
CFB
Call Forwarding (on mobile subscriber) Busy(1)

Cipher FeedBack(2) mode [encryption method]
CFMP
Cellular Fault Management Package
CFN
ConFusioN [B-ISDN user part message]
CFNRc
Call Forwarding on mobile subscriber Not Reachable
CFNRy
Call Forwarding on No Reply
CFP
Cordless Fixed Part [part of a cordless local loop]
CFRS
Concert Frame Relay Services [for connecting LANs with high bandwidths]
CFU
Call Forwarding Unconditionally
CGA
Carrier Group Alarm
CGI
Common Gateway Interface [a protocol specification for transfering parameters between HTML browsers, servers and external programs, e.g. for generating dynamic pages. A CGI Script is a program that is executed on a web server in response to a browser's request.]
CHAP
Challenge Handshake Authentication Protocol [security protocol, uses challenges to verify that a user has access to the system]
CI
Communication Infrastructure(1) [part of OVDM, provides interoperable capability to SNMP and CMOT]

Coded Information(2) [e.g. WinWord or Excel files, vs. NCI]
CIC
Circuit Identification Code [part of MSU, endpoint identifier]
CIDR
Classless InterDomain Routing [defined by RFC1519; address assignment and aggregation strategy]
CIF
Common Intermediate Format(1)

Cell In Frames(2) [proposed by the Cornell University, enables ATM in LAN]
CIL
Components Integration Laboratories
CIM
Computer Integrated Manufacturing(1)

Customer Information Management (system)(2)
Common Information Model(3) [component of NetPC platform management information technologies]
CIO
Corporate IT Organization
CIP
Channel Interface Processor(1)

Concert Internet Plus services(2) [global carrier network, developed specially for the needs of ISP and Internet Reseller. The CIP Service is a Development of Concert, a Joint Venture of BT and MCI]
CIR
Committed Information Rate [characterizes the average transfer rate in a frame relay network]
CIT
Computer Integrated Telephony [DEC's telecom platform]
CIX
Commercial Internet Exchange [backbone free of NFSNET restrictions, prompting widespread and more commercial throughput, predecessor of InterNet]
CK
Check Bit [part of MSU]
CKSN
Ciphering Key Sequence Number
CLASS
Custom Local Area Switching Service(1) [includes intra-LATA services such as call waiting, call blocking, automatic number identification (ANI), priority call, call trace, repeat call]

Custom Local Area Signaling System(2) [a CO based system that relies on SS7 capabilities to provide AIN services such as equal access 800 dialing and private virtual networks]
CLF
Carrier Line Failure
CLI
Command Line Interface(1) [part of OVw, user interface to maps, MIB or objects, alternative to GUI]

Calling Line Identification(2) [feature of an AIN]
CLIP
Calling Line Identification Presentation [ISDN Service]
CLIR
Calling Line Identification Restriction [ISDN Service]
CLLC
Common Language Location identification Code
CLNAP
Connectionless Network Access Protocol [wide area cell based public data service]
CLNP
ConnectionLess Network Protocol
CLNS
Connectionless Network Server (or Service) [(German) Netzwerkvermittlungsdienst, bei dem Daten uebertragen werden, ohne dass vorher eine (logische) Verbindung ueber das Netz hergestellt wurde, OSI based]
CLP
Cell Loss Priority [field, part of ATM header, 1b]
CLR
Cell Loss Ratio [influences transfer dependability, ATM OQS parameter]
CLS
ConnectionLess Server
CLTD
CLock and Tones Distribution
CLTP
Connectionless Transport Protocol [(German) Transportprotokoll, bei dem der Datenaustausch ohne den Aufbau einer (logischen) Transportverbindung und ohne Flusskontrolle ablaeuft]
CM
Configuration Management(1)

Communication Management(2)
Continous Media(3) [supports VOD on WWW]
CMAS
Cellular Management System [part of MAS]
CME
CM-Entity
CMIP
Common Management Information Protocol [OSI(1) Network Management Protocol; used by manager and agent processes to exchange management informationes the agent/manager paradigm to communicate management information between systems; differs from SNMP in that it is more rigorous, is designed for open systems, and is an association-oriented protocol, requiring the two communicating CMIP processes to establish an association before sending any management messages; defined in ISO standard 9596-2, vs. TCP/IP and SNMP]
CMIPDU
CMIP Data Unit
CMIS
Common Management Information Service [OSI(1) Network Management Service; enables management applications to communicate in the OSI environment; offers a set of services that provide for management operation, retrieval of information, and notification of network events]
CMISE
Common Management Information Service Entity (or Element) [set of management services and functions provided to applications for the transfer of management information, provides for selecting specific objects or groups of objects via scoping and filtering]
CML
Command ManuaL
CMO
Computer organization Marketing and Operations group [HP entity]
CMOT
CMIS Over TCP/IP [requires a light-weight presentation protocol to map from the application to transport layers]
CMR
Cell Misinseration Rate [influences transfer speed by out of sequence cells, ATM QOS parameter]
CMSDB
Call Management Services Data Base
CN
Corporate Network
CNC
CoNCentrator(1)

Configurable Network Computing(2) [object based, provides greater flexibility and scalability than traditional client/server technologies; includes event-driven objects and dynamic partitioning; platform neutral]
CNE
Certified Novell Engineer [Netware oriented]
CNI
Communications Network International GmbH [German group, wireline business, formed by Deutsche Bank (25%), Mannesmann (50%) and RWE (25%)]
CNM
Customer Network Management(1)

Computer Network Management(2)
CNO
Computer News Online [published on ESP(2)]
CNR
Channel Number [e.g. in a ZD-A3]
CO
Central Office(1)

Computer Organization(2) [= CSO + CBO + CPBO + WCSO + PSO]
COBOL
COmmon Business Oriented Language
CoLP
Connected Line Identification Presentation
CoLR
Connected Line Identification Restriction [ISDN Service]
COM
Component Object Model [Wintel limited ...]
CONCERT
[MCI & BT subsidiary, provides the user (teleco companies) with a single interface to all telecommunication services and network hardware, "manager of managers", offers outsorcing by is GNS]
CONS
Connection Oriented Network Service [(German) Netzwervermittlungsdienst, der eine (logische) Verbindung ueber das Netzwerk etabliert, bevor Daten (mit Flusskontrolle) uebertragen werden]
COP
Character Oriented Protocol
CORBA
Common Object Request Broker Architecture [specifies mechanisms and interfaces for building distributed object oriented applications, defined by OMG, CORBA 2.0 based on UNO, vs. DCE]
COSE
Common Open Software Environment
COSS
Common Object Services Specification [part of OMA]
COT
Central Office Terminal
CP
Coordination Processor
CPBO
Consumer Products Business Organization [within HP]
CPCS
Common Part Convergence Sublayer [part of ATM payload segmentation or reassembly]
CPDE
Computer Products Distribution Europe [HP distribution center, based in Neuhausen nextto Stuttgart]
CPE
Customer Premise Equipment
CPG
Call ProGress(1) [B-ISDN user part message, used in the USA]

Consumer Products Group(2) [HP entity]
CPL
Corporate Price List
CPLC
Custom Product Life Cycle
CPM
Customer Premises Management(1)

Custom Patch Manager(2)
CPO
Computer Products Operation
CPP
Calling Party Pays [charging method in wireless paging, e.g. with DeTeMobil's Scall service]
CPS
Concert Packet Service
CPSO
Channel Products worldwide Support Organisation [HP entity]
CPSS
Control Packet Switching System
CPT
Cooperative Programming Tool(1)

Cross Platform Toolset(2) [environment for the development of OSF/Motif compliant GUI; developed by Visual Edge Software, Ltd.]
CPU
Central Processing Unit
CR
Carriage Return
CRADA
Cooperative Research and Development Agreement
CRC
Cyclic Redundancy Check(1) [part of ATM meta signalling cell, 10 Byte, also: part of a X.25 packet, added by sending node, checked by next receiving node, which also computes a new CRC. Frame relay computes the number only at the two end nodes]

Country Response Center(2)
CRS
Cell Relay Service [transport of cells between private local ATM networking equipment]
CRUD
Create Read Update Delete
CS
Connection Segment(1)

Circuit Switch(2)
Client/Server(3)
CSA
Connection Segment Associated
CSBU
Commercial System Business Unit [HP entity]
CSC
Computer Science Corporation [HP channel partner]
CSCW
Computer Supported Cooperative Work
CSD
Computer Services Delivery
CSDG
Computer Sales and Distribution Group [new HP computer sales organisation]
CSE
Cooperative Software Engineering
CSI
Colour Status Indicator(1)

Clearing Subnetwork Identification(2)
CSM
Communications System Monitoring
CSMA
Carrier Sense Multiple Access
CSMA/CD
Carrier Sense Multiple Access with Collision Detect
CSNMS
Carrier Service Network Management Systems
CSO
Computer Systems Operation (or Organization)
CSPDN
Circuit Switched Public Data Network
CSPG
Cellular Service Provider Group [as part of FCS(2)]
CSPP
Computer Systems Policy Project [formed by CEOs of the 13 largest computer companies in the USA]
CSR
Customer Service Representatives [working e.g. at help desks or as consultants at customers' sites]
CSS
Cascading Style Sheets(1)

Critical Systems Support(2) [HP WCSO high availability service]
Customer Service System(3)
CSTA
Computer Supported Telecommunication Applications [ECMA standard, defining the communication between a PBX and a computer]
CSU
Channel Service Unit [device used to connect a digital phone line from the phone company to network access equipment located on the customer premises]
CT2
Second Generation Cordless Telephones [1st generation standard, with max. range of 300m around basestations without automatic hand-over, with 40 RF carriers * 1 duplex voice channel (=40 voice channels) per BTS, good for office locations, predecessor of DECT]
CTC
Cell Transfer Capacity [influences transfer speed, ATM QOS parameter]
CTD
Cell Transfer Delay [influences transfer speed, ATM QOS parameter]
CTD
Cambridge Technology Group [system consultant and integrator, founded by John Donovan]
CTI
Computer-Telephony Integration
CTIA
Cellular Telecommunications Industry Association
CTM
Cordless Terminal Mobility [interface]
CTR
Common Technical Regulation
CTS
Courier Time Server [synchronizes the time in a WAN with the GTS and other LTSs]
CTSG
CUA
Common User Access
CUG
Closed User Group
CUKEY
Closed User KEY [special key management for closed groups]
CUL
Client Unit Leader
CV
Code Violation
CVNS
Concert Virtual Network Service [Voice communication service]
CVPN
Concert Virtual Private Networks [IVPN service, launched by BT]
CW
Call Waiting [ISDN Service]

D

D-AMPS
Digital American Phone System [US-Standard, vs. GSM]
DA
Directory Assistance(1)

Destination Address(2)
DAB
Digital Audio Broadcasting
DACS
Digital Access Cross-connect Switch (or System)(1) [switches TDM channels among T1 circuits connected to it]

Directory Assistance Charging System
DAM
DECT Authentication Module
DARPA
Defense Advanced Research Projects Agency
DAS
Dual Attached Station
DAT
Digital Audio Tape
DATEX-P
[X.25 network, provided by the Deutsche Telekom AG]
DAUA
Digital Announcement Unit A [(German) Digitalansage A]
DB
Data Base
DBC
Dynamic Buffer Cache
DBMS
Data Base Management System
DBP
Deutsche BundesPost (German)[German Federal Mail]
DBR
Deterministic Bit Rate [ATM term]
DC
Distributed Computing(1) [like DCE(1) or CORBA]

Data Collector(2) [in FMP1.1: module, which collects events from NEs and does a high level parsing before sending the event to the MD]
DCC
Digital Cross-Connect (system)(1) [Cross-Connector]

Data Communication Channel(2) [2, part of SONET, to enable communication between network elements]
Data Country Code(3)
DCE
Distributed Computing Environment(1) [a suite of software that enables networked computers to share data and services efficiently and securely; recommended by OSF, vs. CORBA]

Data Circuit terminating Equipment(2) [e.g. a modem]
DCF
Data Communication Function
DCN
Data Communication Network [helps to connect various TMN components with one another, is used when various functional groupings are implemented remotely from others]
DCOM
Distributed Common Object Model
DCS
Data Collection Server(1) [e.g. part of FMP-4]

Digital Communication System(2) [1800 Mhz,with ranges from 2*5MHz to 2*75mhz, 1710 - 1785 and 1805 - 1880 MHz, e.g. E-Plus]
Digital Crossconnect System(3)
Data Collection Software(4)
Distributed Computing System(5)
Digital Cellular System(6) [equiv2 DCS(2)]
DCS-32
Data Collection Server with 32 RS-232 ports [part of FMP-4]
DCS-64
Data Collection Server with 64 RS-232 ports [part of FMP-4]
DCT
Digital Cordless Telephone(1)

Discrete Clock Transmitter(2)
DDD
Detailed Design Document(1)

Direct Distance Dialing(2)
DDL
Data Definition Language
DDN
Digital Data Network(1) [e.g. realized by HongKong Telecom]

Defence Data Network(2)
DDNS
Dynamic Domain Name Service [by IBM's OS/2; cooperating with DNS]
DDS
Digital Data Storage [industry standard for recording computer data to a DAT]
DDSN
Digital Derived Services Network [AT&T's national IN provided for BT UK]
DDV
Datendirekt-Verbindung (German) [Festverbindung]
DE
Discard Eligibility(1) [bit, informing a frame relay switch about discarding that frame in an overload situation]

Distributed Enterprise(2)
DECIX
Deutscher Commercial Internet Exchange [in Frankfurt]
DECT
Digital European (or Enhanced) Cordless Telecommunications [2nd generation cordless telephone standard, designed to be capable of supporting very high traffic densities (up to basic rate ISDN) by 10 RF carriers * 12 duplex voice channels per carrier (=120 voice channels) per BTS, at 1895-1906 MHz (private) and 1906-1918 MHz (public), with a proposed extension to a 30 MHz frequency band, with TDMA/TDD access technique, GMSK modulation technique, making it suitable for low mobility-high capacity, vs GSM900, concentrated usage environments such as city center offices and transport hubs, developed in Europe, see also PHS]
DEE
Datenend-Einrichtung (German)
DES
Discrete Event Simulation(1)

Data Encryption Standard(2)
DF1
(German) Digitales Fernsehen 1
DFN
(German) Deutsches ForschungsNetz
DFS
Depth First Search(1)

Distributed File System(2) [part of HP's DCE(1), allows DCE hosts to access each other's files via a consistent global file naming hierarchy in the DCE namespace]
DGPS
Differntial GPS
DHCP
Dynamic Host Configuration Protocol [advanced IP address management by dynamically assigning IP adresses from a given IP address pool to new hosts, based on BOOTP, defined in RFC1561. Currently no support of DNS entry updates]
DHSD
Duplex High Speed Data
DID
Direct Inward Dialing
DIDM
Distributed Internet Discovery and Monitoring [feature of HP OV NNM4.1]
DII
Dynamic Invocation Interface [allows a program to build a request to an object at run time]
DIS
Draft International Standard [as defined by ISO]
DLC
Digital Loop Carrier(1)

Data Link Control(2)
DLCI
Data Link Connection Identifier
DLU
Digital Line Unit [(German) digitale Teilnehmerleitungseinheit]
DM
Distributed Management [Platform or Element of OV, complete superset of SMNP platform]
DMC
Delivery Management Client(1) [PSO managing tool, To be released in Jan96]

Digital Microwave Corporation(2)
DME
Distributed Management Environment [to be worked on by OSF]
DMI
Definition of Management Information(1)

Desktop Management Interface(2) [component of NetPC platform management information technologies]
DML
Data Manipulation Language
DMM
Distributed Management Module [optional extension to the HP AdvanceStack Hub-8U]
DMO
Direct Marketing Organization [HP entity]
DMS
Document Management System
DMT
Discrete Multi Tone [(German) digitales Übertragungsverfahren für kurze Distanzen]
DMTF
Desktop Management Task Force
DMUX
DeMUltipleXer
DMZ
DeMilitarized Zone [network segment accessible from the internet as well as from the intranet, close to a firewall system]
DN
Distinguished Name(1) [alias FDN]

Directory Number(2)
DNA
Digital Network Architecture
DNBE
Datennetzbedieneinheit (German)
DNFS
Distributed Network File System
DNI
Digital Non Interpolation
DNS
Domain Name Server (or System or Service)(1) [maps system names to IP addresses; see also RFC 1956]

Datennetzsignalisierung (2) (German)
DOG
DECT Operators Group [association of DECT related companies]
DOI
Distributed Object Infrastructure
DOKRYPT
Datei Orientierte KRYPTologie (German) [Windows based software for digital signatures and encrypting functions]
DOD
Department of Defense
DOE
Distributed Objects Everywhere
DOMF
Distributed Object Management Facility
DP
Draft Proposal(1) [as defined by ISO]

Dial Pulse(2)
Desktop Publishing(3)
DPC
Destination Point Code [part of MSU, Zielpunktcode (German)]
DPE
Distributed Processing Environment
DPM
Digital Performance Monitoring (system)
DPMS
Digital Performance Management System(1) [for monitoring PDH transmission networks]

Data Processing and Management Server(2) [standard component of BMP, contains functions that form a concentration node for usage data processing functions]
DPP
Distributed PrePlan
DPP
Data Post Processing System
DPS
Distributed Print Service(1) [standard print spooling service across the entire networked enterprise; can work with hundreds of printers, spoolers, and clients; inntegrated in SAM; introduced with HP-UX10.20]

Domestic Packet Switch network(2) [as operated by VIAG Interkom]
DQDB
Distributed Queue Dual Bus [OSI layer 1 and 2 of MAN standard,aka IEEE 802.6 standard]
DR
Distributed Restoration
DRA
Distributed Restoration Algorithms
DRAM
Dynamic Random Access Memory
DR
Disaster Recovery
DRP
Disaster Recovery Procedure
DRPM
Digital Radio Performance Monitor
DRS
Digital Reference Signal(1) [sequence of bits representing a 1004Hz to 1016Hz signal with a power level equal to one milliwatt]

DECT Radio Site(2) [bundled in DECT islands, controlled by a GDSC]
DRTV
Direct Response TV
DRX
Discontinous Reception
DS
Data Server(1) (process) [e.g. running on IFMS's data collection servers]

Digital Signal(2)
DS1
Data Speed rate 1 (or Digital Signal (Level) 1)[1.544 Mbps, equivalent to 24 voice channels]
DS3
Data Speed rate 3 (or Digital Signal (Level) 3) [44.7 Mbps, equivalent to 28 DS1 signals or 672 voice channels]
DSA
Directory Server Agent(1) [responsible within the X.500 standard for the administration of hierarchical organized information (eg addresses); usually spread over a network]

Data Service Adapter(2) [GSM modem card]
DSAC
Dial Service Administration Center
DSC
[network switch manufacturer]
DSET
Distributed Software Engineering Tools [US company, offers GDMO Agent Emulator]
DSGA
Digital Signal Generator A
DSI
Detailed Spectrum Investigations(1) [as performed by ERO]

Dynamic Skeleton Interface(2)
Data Source Integration(3) [technology used e.g. by HP MeasureWare Agents. It allows customers to integrate resource and performance metrics from IBM AIX, Sun Solaris or AT&T GIS systems into HP Performance tools.]
Digital Speech Interpolation(4)
DSII
Dual Stream Instant Ignition [latest release as well as the previour release of the operating system will be available at the same time to a customer to choose, e.g. starting 01Jul95 HP-UX 9.07 and HP-UX 9.05PCO]
DSL
Digital Subscriber Line
DSLAM
Digital Subscriber Line Access Multiplexer [(German) DSL-Anschlussmultiplexer]
DSM
Distributed Systems Management
DSN
Digital Switching Network [(German) Digitales Koppelnetz]
DSOM
Distributed System Object Model
DSP
Digital Signaling Processor
DSPM
DiSPlay Manager [of OpC]
DSPU
DownStream Physical Unit
DSR
Digital Satellite Radio
DSRR
[one of the coming pan-European services or standards]
DSS
Distributed Sample Scrambling [in physical layer in broadband communication]
DSS1
Digital Subscriber System No. 1 [European ISDN standard, will replace German standard 1TR6]
DSSR
Digital Short-range Radio
DSSSL
Document Style Semantics and Specification Language [extended SGML]
DSU
Data Service Unit
DTAP
Direct Transfer Application Part
DTC
Data(com) and Terminal Concentrator (or Controller) [HP product. Connects to RS232 lines]
DTD
Document Type Definition [see also SGML]
DTE
Data Terminal Equipment [e.g. a PC]
DTF
Digital Transmission Facility
DTI
Department of Trade and Industry
DTM
DeTeMobil [subsidiary of Deutsche Bundespost Telekom]
DTMF
Dual Tone Multi Frequency (signaling) [method for transmitting address pulses (and other signaling information), using a set of dual-tones to represent individual characters or numbers, vs. MF(2), used for signaling by station equipment like telephone sets]
DTP
Distributed Telecom Platform
DTR
Digital TRunk [(German) Digitalverbindungsleitung]
DTS
Distributed Time Service [service that synchronizes clocks on DCE hosts with each other and, optionally, with an external clock]
DTX
Discontinous Transmission
DUA
Directory Server Agent [responsible within the X.500 standard for the query of DSA initiated by users or applications]
DUART
Dual Universal Asynchronous Receiver/Transmitter
DUP
Data User Part [used for circiutswitched data networks]
DVB
Digital Video Broadcasting
DVD
Digital Video Disc
DVMRP
Distance Vector Multicast Routing Protocol
DVPN
Domestic Virtual Private Network [as operated by VIAG INTERKOM]
DVV
DatenVerarbeitungsVerantworlicher (German)
DX
Digital Exchange
DXI
Data Exchange Information(1)

(SMDS) Data Exchange Interface(2) [in broadband communication]

E

EA
Expert Advisor(1) [part of an expert system]

Early Assignment(2)
Event Agent(3) [management service in OV, facilitates event distribution within the network]
Extensible SNMP Agent(4)
EAC
EIR Administration Center [UNIX based application that manages EIR data and interfaces with the CEIR]
EADAS
Engineering and Administration Data Acquisition System
EAM
Enterprise Architecture & Management
EAZ
(German) Endgeraeteauswahlziffer
EBAF
Extended(?) Bellcore Accounting Format [standard billing format]
EC
Event Correlator(1) [e.g. part of FMP(2)]

European Community(2)
Electronic Commerce(3)
ECB
Electronic Code Book [encryption standard]
ECC
Embedded Communications Channel(1)

Error Correction Circuitry(2) [typically used in reference to a type of RAM]
ECDL
Event Correlation Definition Language [used by ECS]
ECIS
European Committee for Interoperable Systems
ECMA
European Computer Manufacturers Association
ECS
Event Correlation Services [based on HPOpenView]
ECSA
Exchange Carriers Standards Association
ECSC
European Customer Support Center [HP customer organization, first contact for PC warranty questions; based in Amsterdam]
ECTRA
European Council of Telecommunications Regulatory Authorities
EDA
Electronic Design Automation [integrated design and simulation of electronical circuits and systems]
EDI
Electronic Data Interchange
EDIF
Electronic Design Information Format [a framework for the definition and exchange of electronic design data, including masks, circuits and test data]
EDIFACT
Electronic Data Interchange For Administration, Commerce and Transport [a collection of information exchange standards for international electronic transfer of specifications, orders and payments]
EDM
Enterprise Desktop Management
EDMS
Enterprise Desktop Management Services
EDP
Electronic Data Processing
EDSS1
European Digital Subscriber System number One [(German) fruehere Bezeichnung fuer das ISDN-Protokoll DSS1]
EDTV
Enhanced Definition TeleVision
EEBU
Extended Enterprise Business Unit [HP Entity]
EENS
European Enterprise Network Strategies
EERP
Extended Enterprise Resource Planning
EF
Enhanced Functions(1)

Event Filter(2) [in FMP1.1: module in MD, which filters alarms send to the FMP server]
EFCI
Explicit Forward Congestion Indicator [in ATM one of the congestion feedback modes allowed by ABR service]
EFD
Event Forward Discriminator [object, created and managed by the EA(3). Each application or agent that is interested in receiving events creates an EFD. The EA(3) then uses these EFDs to determine where it should send incoming events. EFDs contain destination addresses of the interested applications or agents.]
EFF
Electronic Frontiers Foundation [privacy and security watchdog organization]
EGP
Exterior (or External) Gateway Protocol [used by all routers attached to the DDN(2), alternative to tcp or udp]
EGSM
Extended GSM
EH
Event Handler
EHPT
EHSA
Enhanced High System Availability
EIA
Electronic Industries Association
EIC
European Integration Center
EICD
External Interface Control Document
EIGRP
Enhanced Interior Gateway Routing Protocol [enhanced version of IGRP, developed by Cisco; uses the same vector algorithm and distance information as IGRP; convergence properties and operating efficiency have improved significantly, however]
EIP
Ethernet Interface Processor
EIR
Equipment Identification Register [maintained by the network operator]
EIRP
Equivalent Isotropic Radiated Power [(German) Guetemass eines Senders]
EISA
Extended Industry Standard Architecture
EISS
Europaeisches Institut fuer System-Sicherheit [located at the univerisity of Karlsruhe]
EL
Event Logger(1) [part of FMP(2)]

Element Layer(2)
ELA
Event Log Agent [part of EMS]
ELAN
Emulated LAN
ELC
Education Life Cycle
EM
Element Management (or Manager)(1)
Expert Modifier(2) [part of an expert system]
Event Manager(3) [component of SNI(3) SMP(3)]
Enterprise Messaging(4)
EMBU
Enterprise Middleware Enterprise Unit [HP entity]
EMI
ElectroMagnetic Interference
EML
Element Management Layer [see NML and SML]
EMLS
Event Message Logging System [error documentation and distribution system in Siemens IN]
EMML
Extended MML
EMN
EWSD-TMN
EMO
Electronic Mail Operation
EMS
Event Management Service(1) [part of OVDM, provides a mechanism to collect, log and route SNMP or CMIS events in a multivendor network] /
Element Management System(2) [helps to manage individual devices like modems or routers tied to corporate networks and can support an industry standard for device mgmt. Can also manage services (e.g. inbound and outbound calling services) and provide realtime info about faults, Trouble Tickets, performance and problem resolution. For a class of managed objects]
EMT
European Management Team [led by Franz Nawratil]
ENM
EWSD Network Management
ENM/OS
ENM/Operating System
ENS
Enterprise Network Strategies
EoB
End of Bus
EOC
Embedded Operations Channel
EOCC
European OSS Competence Circle
EOS
Electronic Output Strategies
EPHOS
European Procurement Handbook for Open Systems [(German) Europaeisches Beschaffungshandbuch]
EPPA
European Public Paging Association
EPS
Enterprise Parallel Server
EQN
Extended Queuing Network
ERB
Editorial Review Board
ERBIS
(German) Einheitliches Rechnergestuetztes BetriebsInformationSelement
ERC
European Radiocommunications Committee [of the CEPT]
ERMES
European Radio MESsaging [GSM-based paging, 2nd generation standard]
ERO
European Radiocommunications Office [permanent organ of the ERC of the CEPT, located in Copenhavn, has the objective of developing proposals for a European Table of Frequency Allocations and Utilisations for the band from 29.7 Mhz to 105 GHz]
ERP
Effective Radiated Power
ERS
External Reference Specification [specifying (programmatic) user interfaces]
ES
Errored Second
ES-IS
End System to Intermediate System
ESA
Event Sieve Agent(1) [part of EMS]

European Space Agency(2)
ESBU
Enterprise Systems Business Unit [HP entity]
ESD
ElectroStatic Discharge
ESC
Engineering Service Circuits
ESF
Extended Super Frame [T1 framing format]
ESG
Enterprise Server Group
ESIG
European SMDS Interest Group
ESIOP
Environment Specific Interoperability Protocol [part of CORBA 2.0]
ESM
Enterprise System Management(1)

Enterprise Solutions Model(2)
ESMR
Extended Specialized Mobile Radio
ESN
Electronic Serial Number [of e.g. a mobile handset, see also MIN]
ESO
Enterprise Solution Organization
ESP
Enhanced Service Provider(1)

Electronic Sales Partner(2) [HP internal sales support base]
Encapsulating Security Payload(3) [extension of the IP protocol; by encrypting either IP packets (tunnel mode) or transport protocol packets (TCP, UDP or ICMP, transport mode)]
ETC
Enhanced Throughput Cellular [wireless data access protocol, developed by AT&T Paradyne]
ETD
Electrical Time division Demultiplexer
ETDM
Electrical Time Division Multiplexing
ETIS
European Telecommunications Informatics Services [telecom service provider consortium; one of the founders of SPIRIT]
ETM
Electrical Time division Multiplexer
ETNS
European Telephony Numbering Space
ETO
European Telecommunications Office [organisation, located in Kobenhavn (Denmark), providing standardised application procedures for companies wanting to offer new services in their local countries]
ETS
European Technical (or: Telecommunication) Standard [as convergence layer]
ETS300640
ETS for "Golden Numbers" [confirms the standard key pad layout into four rows of three with the numbers running from left to right from 1 to 9 and then *, 0, # on the bottom row; it then assigns alphabetic letters to the keypad numbers; the 1 has no letters assigned; the 2 gets a, b, c; the 3 d, e, f; and so on with three letters each until the 7, which gets p, q, r, s; the 8 gets t, u, v and the 9 w, x, y, z.]
ETSI
European Telecommunications Standardisation (or Standards) Institute
EUTELSAT
EUropean TELecommunications SATellite organization
EVE
European Videophone Experiment
EVUA
European VPN Users Association [group of multinational companies, founded by Rank Xerox and ICI]
EWOS
European Workshop for Open Systems [(German) Organisation, in der Hersteller und Anwender von offenen Systemen (gefoerdert von der Europaeischen Kommission) Vorschlaege fuer Profilnormen erarbeiten]
EWS
Engineer Work Station
EWSD
Elektronisches WaehlSystem Digital (German) [Siemens system]
EWU
EntWicklungsUmgebung (German)
EZ
EntwicklungsZentrum [(German), operated by the German Telekom, 5 sites]

F

FAC
Final Assembly Code
FACCH
Fast Associated Control Channel
FAQ
Frequently Asked Questions
FAS
Frame Alignment Signal
FBC
FeedBack Control [ATM term]
FBS
Fernbedien- und Steuerbaugruppe (German)
FCAPS
Fault Configuration Accounting Performance Security
FCC
Federal Communications Commission
FCCH
Frequency Correction Channel
FCI
Fibre Channel Interface [155mb/s]
FCS
Frame Check Sequence(1)

Federation of Communications Services(2)
FD-SCSI-2
Fast/Differential implementation of SCSI-2 [10MB/sec, up to 7 devices]
FDCT
Forward Discrete Cosine Transformation
FDD
Frequency Division Duplex
FDDI
Fiber(optic) Distributed Data Interface [ANSI standard for high speed LANs, based on fibre optic, works on a double token ring technology, vs. ATM/B-ISDN]
FDM
Frequency Division Multiplex
FDMA
Frequency Division Multiple Access [used by existing cellular systems by dividing the total band allocated to a cellular operator (25MHz) into discrete channels of a bandwidth of 30 kHz each. With 833 channels available and each conversation requiring two channels, 416 pairs of frequency are available to each operator, cheaper than TDMA or CDMA]
FDN
Fully Distinguished Name [a unique sequence of RDNs, constructed by traversing a containment tree from the root to an object instance, aka MOI]
FD SCSI-2
Fast/Differential implementation of SCSI-2 [10MB/sec, up to 7 devices, used only on older workstations]
FE
Fault Event
FEA
Front End Agent [part of FMP(2)]
FEBE
Far End Block Error
FEC
Forward Error Correction [error correction method in the GSM standard]
FECN
Forward Explicit Congestion Notification [notifiying bit, informing the next frame relay switch]
FEFA
Far End Failure
FEIP
Fast Ethernet Interface Processor
FEP
Front End Processor [(German) Kommunikationsrechner]
FER
Frame Erasure Rate [(German) Rahmenfehlerquote]
FEXT
Far End CrossTalk [(German) Fernnebensprechen]
FFM
First Failure to Match
FHSS
Frequency Hopping Spread Spectrum
FIB
Forward Indicator Bit [part of MSU]
FIFO
First-In, First-Out
FIP
FDDI Interface Processor
FIPS
Federal Information Processing Standard [(German) von NIST verabschiedetes Standardisierungsdokument fuer die Verwendung von IT in der US-amerikanischen Bundesverwaltung]
FIPS60
Federal Information Processing Standard 60
FIRP
Federal Internetworking Requirements Panel [(German) hochrangiges, von NIST eingesetztes Gremium, das Strategien im Bereich offener Netze, Verwendung von Standards etc. in der US-amerikanischen Bundesverwaltung erarbeitet]
FISU
Fill In Signal Unit [Fuellzeicheneinheit (German)]
FITL
Fibre In The Loop
FLS
Fault Logging System
FM
Fault Management
FMAC
Facility Maintenance and Administration Center
FMAS
Facility Management System [part of MAS]
FMC
Funnel Management Client [PSO managing tool, tracks leads thru the funnel until a deal is either won or lost. To be released in Jan96]
FMO
Future Mode of Operation
FMP
Fault Management Platform(1) [developed by SNO]

Formatted Message Processor(2) [part of FMP(1)]
FMP-1
FMP Single Server Solution
FMP-4
FMP Multiple Server Solution [split between main FMP server and data collection servers]
FMS
FM Solution
FN
Frame Number
FOI
Field Of Interest [such as BITA, EERP, CSD, TINSD, ITSM, EM, ITI and EDMS]
FOIRL
Fiber Optic InterRepeater Link [industry standard for optical fiber products, replaced by 10Base-FL]
FOT
FOrward Transfer(1) [B-ISDN user part message]

Flow Object Transfer(2)
FOTS
Fibre Optics Transmission Systems [electro-optical converter]
FP
Fixed Parts
FPH
FreePHone
FPLMN
Foreign Public Land Mobile Network [vs. HPLMN]
FPLMTS
Future Public Land Mobile Telecommunications Systems [1885-2025 and 2100-2200 Mhz, for global mobile services, with satellite components in the top 14Mhz of each band, ITU recommendations planned to be stable 1997-1998]
FPM
Field Project Management
FR
Frame Relay [new packet switching technology, 56kb/s to 1.5Mb/s, data packets only]
FRF
Field Registration File [possible source for field definition in OVw]
FRSU
Fixed Radio Subscriber Units [component of WiLL]
FS
Functional Specification
FSAN
Full Service Access Network [(German) Netzbetreiberinitiative]
FSB
For Small Business
FSBU
Financial Services Business Unit [HP entity]
FSIP
Fast Serial Interface Processor
FSL
File System Layout
FSM
Finite State Machine
FSN
Forward Sequence Number [part of MSU]
FT
Fault Ticket(1)

Fault Tolerant(2)
FT1
Fractional T1 [Service offering data rates between 64kb/s (DS0 rate) and 1536 Mb/s (DS1 rate)]
FTAM
File Transfer Access Method (or and Management) [(German) "ftp" auf OSI(1) Application Services, interactive file transfer]
FTC
Federal Trade Commission [US antitrust authority]
FTMI
France Telecom Mobiles Internationale [France Telecom subsidiary]
FTP
File Transfer Protocol [TCP/IP based protocol for transferring files, Internet standard]
FTTB
Fibre to the Building [optic fibre network concept]
FTTC
Fibre To The Curb [optic fibre network concept]
FTTH
Fibre To The Home [optic fibre network concept, up to endusers]
FTZ
(German) Forschungs- und TechnologieZentrum
FWD SCSI-2
Fast/Wide/Differential implementation of SCSI-2 [20MB/sec, up to 15 devices]

G

GAP
Generic Access Protocol
GBR
General Business Release [e.g. HP-UX 10.0 version B.10.01, to be released July 95]
GCF
Generic Command Facility
GCRA
Generic Cell Rate Algorithm [ATM term]
GDMO
Guideline for Definition of Managed Objects [defines standard templates describing managed Object Classes and their services with their attributes, notifications, behaviors operations and actions supported by the managed object, defined by X.722/ISO 10165-4, a more complex object specification language than e.g. Concise MIB or Common OV]
GDS
Global Directory Service [maintains a database of objects that may exist anywhere in the world and enables DCE programs to access objects outside a cell]
GDSC
GSM DECT Site Controller [handling the control of DRS(2)s]
GDSS
Group Decision Support Systems
GEA
Gigabit Ethernet Alliance
GEMS
Generic Element Management Solution [formerly aka INMS]
GEO
Geostationary Earth Orbit [36000 km above ground]
GFC
Generic Flow Control [field, 4 b, part of ATM header, used by UNI]
GfD
Gesellschaft fuer Datenfunk [German consortium for mobile data services]
GFLOPS
Giga FLoating point OPerations per Second
GFO
German Field Organization [within HP]
GFRI
Global Formation and Regional Implementation team [within HP]
GGT
Global Governance Team
GIBN
Global Interoperability of Broadband Networks [international platform for the support of common research and development projects, in telemedicine, telelearning and industrial telecooperation]
GIF
Graphics Interchange Program [supported by CompuServe, Inc., based on LZW]
GII
Global Information Initiative [launched by the G-7 ministers, at a meeting in Brussels, Belgium, February 25, 1995]
GIOP
General Inter-ORB Protocol
GIP
Global Internet Project
GKV
(German) GeschaeftsKundenVertrieb
GLASS
GLobally AcceSsible Services
GLR
Global Location Register
GMSC
Gateway MSC
GMSK
Gaussian Minimum Shift Keying [Characteristics of the GSM modulation]
GMT
GDMO Modeling Toolkit
GNE
Gateway Network Element
GNIM
Generic Network Information Model
GNS
Global Network Service [see CONCERT]
GOD
Global Operations Directorate [based on an integrated manager system, managing agents on different vendor devices]
GOS
Grade Of Service
GOSIP
Government OSI Profile [government procedure Guidelines that mandate OSI(1) products from vendors]
GPDS
General Packet Data Service
GPRS
General Packet Radio Service
GPS
Global Positioning System
GPSy
Global Product and pricing System
GPT
GEC Plessey Telecommunications [UK based company; owned 60% by GEC and 40% by Siemens]
GSDN
Global Software Defined Network [ AT&T's VPN]
GSM
Global System for Mobile communications [originally: Groupe Speciale Mobile, pan-European ISDN compatible digital cellphone standard (low capacity-high mobility system, vs. DECT), frequency bands: 905-914 Mhz, 950-959 Mhz, on demand 890-915 Mhz and 935-960 Mhz, 2nd generation standard, phase 2+ implementations: hi speed data transmission (19.2 up to 64 kb/s), generalised packet radio services, GSM900/DCS1800 dual-band operation, interworking between GSM900 and DECT, and CCBS(2), w/w 130 operators (Jan96)]
GSS
Generic Security Standard
GTS
Global Time Server [provides time in a DCE cell]
GTT
Global Title Translation
GUI
Graphical User Interface [part of OVw, e.g. X-Windows, prefered alternative to CLI]
GVPN
Global VPN
GW
GateWay
GWL
GateWay Links

H

HA
High Availability
HAL
Hardware Abstraction Layer [integrated in MS(3)'s Windows NT]
HAS
(German) HauptAnSchluss
HBCI
Home Banking Computer Interface
HDB
Home Data Base
HDB3
High Density Bipolar Code of order 3 [(German) Leitungskodierungsverfahren]
HDLC
High Level Data Link Control [standardized synchronous securing method]
HD-MM CD
High Density MultiMedia CD [developed by Sony/Philips, data storage capacity 7.4 GB or up to 270 minutes video (MPEG 2)]
HDSL
High-bitrate Digital Subscriber Line [with bitrates of 2Mb/s, over symmetrical double copper wires]
HDTTS 50
High Density Thumb Screw, 50 pin
HDTTS 68
High Density Thumb Screw, 68 pin
HDTV
High Definition TeleVision
HEC
Header Error Control [field, part of ATM header, 8b]
HEMS
High Level Entity Management System
HFC
Hybrid Fiber Coax
HFS
Hierarchical File System
HIP
HSSI Interface Processor
HLC
High Layer Compatibility
HLC
High Layer Compatibility
HLD
High-Level Design
HLM
Heterogenous LAN Management
HLP
High Level Parser [in FMP1.1: part of the DC(2), parses events to identify header, footer and the event list]
HLR
Home Location Register [database, contains permanent subscriber information]
HMA
Human Machine Adaption [performs the conversion from the MAF information model to the information model presented by the TMN to the PF by masking some dat, adding information and reorganizing the whole; also supports authentication and authorization of users]
HMMP
HyperMedia Management Protocol [protocol for accessing components of the HMMS; allows object-oriented access to managed objects; not to be used directly with web browsers, but as the communications mechanism between components within a management environment.]
HMMS
HyperMedia Management Schema (or Services) [schema for storing management information; easily extensible; developed by MicroSoft]
HMP
Host Monitoring Protocol
HMOM
HyperMedia Object Manager [component of NetPC platform management information technologies]
HO
Hand Over [e.g. of a voice channel between a mobile phone and one BTS to the next BTS]
HoB
Head of Bus
HP
Hewlett Packard
HPC
High Performance Computing (or: Computer)
HPLMN
Home Public Land Mobile Network [vs. FPLMN]
HPR
High Performance Routing
HPSL
HP Support Line
HR
Human Ressources
HRTF
Head Related Transfer Function [within VR]
HSC
High Speed Connect
HSCSD
High Speed Circuit Switched Data
HSD
High Speed Data
HSM
Hierarchical Storage Management
HSMR
Hourly Status Message Report
HSN
Home Shopping Network(1) [US-Teleshopping channel]

Hopping Sequence Number(2)
HSSI
High Speed serial Interface [DXI interface, in broadband communication]
HTML
HyperText Markup Language [key specification of WWW, see also URL, HTTP and RFC 1942]
HTTP
HyperText Transfer Protocol [key specification of WWW, see also URL, HTML, RFC 1945]

I

IAA
IAM Acknowledge [B-ISDN user part message]
IAB
Internet Activities (or Architecture) Board [governing body of the Internet, decides about e.g. standards]
IAHC
Internet Ad Hoc Committee
IAM
Initial Address (Message)(1)

ISDN Access Module(2)
IAR
IAM Reject [B-ISDN user part message]
IAT
Inter Arrival Time [(german) Zeit zwischen der Ankunft zweier ATM-Zellen einer Verbindung]
IBS
Intelsat Business Service
IBT
International Business Traveller(1) [target market for MSS]

Intrinsic Burst Tolerance(2) [(German) annehmbare Burstgroesse]
IC
Interexchange Carriers(1) [see IXC]

Input Controller(2)
InterCompany(3) [HP internally]
ICCS
Integrated Communications Cabling System [offered by SIEMENS]
ICD
International Code Designator
ICE
Intergrated Capacity Expansion
ICF
Information Conversion Function(1) [used in intermediate systems to translate the information model at one interface into the information model at the other interface, see CCITT Rec. M.3010]

International Cryptography Framework(2) [new security solution for the internet and eCommerce; details include a four part architecture; ICF consists of 1) a host system which delivers secured applications to the end user, 2) a cryptographic unit (a hardware based encryption engine), 3) a policy token (software that tells the cryptographic unit what level of encryption is desired by company policy and allowed by governmental restrictions) and 4) a network security server run by a certified organization]
ICI
Inter-Carrier Interface
ICIP
Inter-Carrier Interface Protocol
ICMP
Internet Control Message Protocol [part of IP for handling errors and control messages, eg ping]
ICO
Intermediate Circular Orbit [for MSS, aka MEO]
ICOEM
IC(3)OEM
ICP
Independent Content Provider
ICS
Intuitive Command Structure
ID
IDentifier
IDCT
Inverse Discrete Cosine Transformation
IDE
Integrated Development Environment
IDL
Interface Definition Language [defined by OMG (CORBA IDL), declaratory and more complex object specification language than e.g. Concise MIB or Common OV]
IDLC
Integrated Digital Loop Carrier
IDN
Integrated Digital Network(1)

Integriertes Text- und Datennetz(2) (German)
IDNX
Integrated Digital Network eXchange
IDR
Intermediate Data Rate
IDSG
Intelligente DatenSichtGeraete (German) [now: PCs]
IE
Internet Explorer [by MS(3)]
IEC
International Electrotechnical Commission(1) [see further information]

Interexchange Carrier(2)
IET
Instant Electronic Translation [future automatic high level language translation capability]
IETF
Internet Engineering Task Force [subgroup of IAB, investigates and solves technical problems, makes recommondations to the IAB, see also IRTF]
IF
Intermediate Frequency
IFC
Internet Foundation Class
IFF
Identification Friend or Foe
IFMP
Interfacer to FMP Server
IFMPS
Interfacer to FMP Server [in FMP1.1: module in the MD, which sends alarms to the IMD module. Supports bidirectional communication to IMD]
IFU
Instruction Fetch Unit
IGES
Initial Graphics Exchange Specification [Definition of a neutral file format for interchange of 2D and 3D CAD information via indivually created translation programs]
IGMP
Internet Group Management Protocol
IGOSS
Industry/Government Open Systems Specification [(German) gemeinsame OSI-Beschaffungs- und Betriebsspezifikationen der US-amerikanischen Regierung, der MAP/TOP-Gruppe und der amerikanischen Stromversorgungsunternehmen]
IGRP
Interior Gateway Routing Protocol [designed by Cisco; monitors the network to determine the status of each route and selects the best route for each data packet]
IIP
Internet Imaging Protocol [developed by Eastman Kodak, Live Picture, Microsoft and Netscape; evaluation software available]
IIOP
Internet Inter-ORB Protocol [part of CORBA]
IISP
Interim Interswitch Signaling Protocol
IKMP
Internet Key Management Protocol
IKZ
(German) ImpulsKennZeichen [traditional method of dual frequency switch control protocol]
ILEC
Incumbent Local Exchange Carrier [the traditional local telephone service provider in the USA]
ILMI
Interim Local Management Interface [service, enables control of ATM devices and mgmt of a network]
IM
Inventory Management
IMACS
Integrated MAnufacturing Control System
IMD
Interfacer to Mediation Device [in FMP1.1: module in the FMP server, which receives the alarms from the IFMPS module. Supports bidirectional communication to IFMPS]
IMEI
International Mobile Equipment Identity [to be checked against the EIR to avoid fraud]
IML
Internationale MietLeitung [German]
IMSI
International Mobile Subscriber Identity
IMT2000
[see UMTS]
IMTS
Improved Mobile Telephone Service
IN
Intelligent Network [provides collect calls, 800 numbers, VPN and digital cellphone systems, based on SS7 to transfer information]
INA
Information Network Architecure [platform which integrates TMN technologies with DC technologies, specified by Bellcore]
INAP
Intelligent Network Application Part [protocol, ETSI Interconnection Standard]
INCL
Intelligent Networked Computing Laboratory
IND
Information Networks Division [part of STG]
INE
Intelligent Network Element
INI
Inter Network Interface
INM
Integrated Network Monitoring
INMARSAT
INternational MARitime SATellite organisation
INMS
Integrated Network Management System [composed of FMP, NPR and ARS]
INS
Intelligent Network Systems(1)

Integrated Network Servicing(2)
INTELSAT
INternational TELecommunications SATellite organization
INTUG
International Telecommunications Users Group
IOR
Interoperable Object References
IP
Intelligent Peripherals(1) [adjunct to an SCP, plays recorded announcements to the caller to get more infos from digit dialling or voice recognition]

Internet Protocol(2) [with following addressing scheme: 
Class First Bits   Address space            Reserved for Intranets   Network part Host part
A     0xxxxxxx     0.0.0.0-127.0.0.0        10.0.0.0-10.255.255.255  1 Byte       3 Byte
B     10xxxxxx   128.0.0.0-191.255.0.0    172.16.0.0-172.31.255.255  2 Byte       2 Byte
C     110xxxxx   192.0.0.0-223.255.255.0 192.168.0.0-192.168.255.255 3 Byte       1 Byte
D/E   111xxxxx   224.0.0.0-255.255.255.0                             reserved     0 Byte
; see also RFC1597]
IPC
Inter-Process Communication [e.g. as used by EMN]
IPF
Information Processing Function
IPI
Internal Programming Interface [used by EMN]
IPMH
InterProcess Messaging Handling [part of NetExpert (OSI(2) product)]
IPng
Internet Protocol Next Generation [eg. based on an addressing schema with 16 Byte/address, or 1564 addresses/squaremeter on earth surface]
IPP
Internet Printing Protocol [suggested by IETF]
IPRA
Internet PCA Registration Authority
IPSEC
Internet Protocol SECurity (working group)
IPSIT
International Public Sector IT(1) group [formed by government officials responsible for communication]
IPSP
IP Security Protocol [supports host-to-host security, and subnet-to-subnet and host-to-subnet topologies]
IPv6
Internet Protocol Version 6 [aka IPng]
IPX
Internet Packet Exchange (protocol) [NetWare's native LAN communications protocol]
IRB
Instruction Reorder Buffer
IRC
Internet Relay Chat
IRDA
InfraRed Data Association [defined a standard for wireless local data exchange, up to 115.2 kbd, HP originated, detailed information]
IRTF
Internet Research Task Force [subgroup of IAB, see also IETF]
IRV
Initial Repeat Value
IS
International Standard [as defined by ISO]
IS-41
US Mobile Architecture
IS-54
US TDMA Standard
IS-95
US CDMA Standard
IS-IS
Intermediate System to Intermediate System protocol [ISO dynamic routing protocol]
ISD
Internet Security Division(1) [HP entity]

Integrated Systems Division(2)
ISDN
Integrated Services Digital Network [basic rate: 2*64kb/s bearer channel (B) + 1*16kb/s for establishing connection (D), primary access: 30*64kb/s (B) + 1*64 kb/s (D), diensteintegrierendes digitales Fernmeldenetz (German), detailed description]
ISL
Inter Satellite Links
ISMS
Integrated Service Management System [platform for different EMSs(2) to communicate with each other, e.g. AT&T's Accumaster Workstation or MCI's INMS]
ISN
Internet School Networking (group) [see also RFC 1941]
ISO
International Standards Organisation(1) [with a standardization process flow from DP(1) to DIS to IS. See further information]

International Software Operation(2) [HP operation, located in Bangalore, India]
Information System Organisation (3) [HP operation, now renamed to IT Germany]
ISP
International Standardized Profile(1)

Internet Service Provider(2)
International Signaling Point(3)
Implementation Support Plan(4)
ISS
Internet Security Scanner
ISSI
Inter-Switching System Interface [(german) Schnittstelle zwischen zwei SMDS-Switches innerhalb eines LATA]
ISSIP
Inter-Switching System Interface Protocol
ISSL
Internet and System Security Lab [HP lab]
ISUP
ISDN User Part [provides ISDN call setup and control, harmonized to work with ISDN access protocol]
ISV
Independent Software Vendor [aka VAB]
IT
Information Technology(1)

Integrated Terminal(2)
Integration Test(3) [part of SVVP]
ITA
IT AdminCenter [ Detailed information]
ITC
Information Technology Center (Europe) [umbrella for the three HP Customer Centers in Grenoble, Brussels and Boeblingen, for internal European IT customers]
ITF
Information Transport Function
ITG
Internet Technology Group [HP entity]
ITI
IT Infrastructure
ITN
Internationales Transport-Netz [German]
ITO
IT Operation [HP application incorporating HP's industry leading network management platform, HP OpenView Network Node Manager (NNM 4.1) and HP OpenView OperationsCenter. Detailed information]
ITP
Integrated Technology Planning
ITSM
IT Service Management
ITT
Invitation To Tender [Angebotsaufforderung (German)]
ITU
International Telecommunication Union
ITU-T
International Telecommunication Union - Telecommunications (Standardization) [formerly: CCITT]
ITU-TC
International Telecommunication Union - Telecommunications Committee [formerly: CCITT]
IVMO
Initial Value of Managed Object
IVoD
Interactive Video on Demand
IVPN
International Virtual Private Networks
IVR
Intelligent Voice Recognition(1)

Interactive Voice Response(2)
IVS
Informations-Verarbeitungs-Service (German) [operated by the german Telekom, 134 sites, controlling up to 20 UNIX-Server each, monitored by SCZ]
IWG
HP OpenView Integration Working Group
IWS
Integrated Workflow Services
IWU
(LAN) Interworking Unit [device for interconnecting LANs, e.g. bridge or router]
IXC
Interexchange Carriers Inter-Exchange Companies [long line companies, e.g. in the USA (w marketshare): AT&T (65%), MCI (18%) or Sprint(10%), contrast and complement Local Exchange Companies (LEC)]
IuK
Informations- und Kommunikationstechnik(en) (German)

J

JAD
Joint Analysis and Design
JCG
Joint Coordination Group
JDBC
Java DataBase Connectivity [interface definition for a database - application communication, based on Java classes, SQL commands etc., see also ODBC]
JDC
Japan Digital Cellular [used by all service providers in Japan, with two frequencies around 800MHz and 1.5GHz]
JDK
Jaja DeveloperKit
JEPI
Joint Electronic Payment Initiative
JFS
Journaled File System [aka LFS]
JIT
Just In Time
JITT
Just In Time Training [at the workspace, using multimedia technology]
JMAPI
Java Management API [from SUN]
JPEG
Joint Photographic Experts Group [ISO standards committee, also a method of file compression and a graphics file format. See further details]
JRTS
Java Run Time System [an implementation of JVM for a specific platform, i.e. hardware]
JTAM
Job Transfer And Management
JTC
Joint Technical Committee
JTC 1
Joint Technical Committee 1 [(German) gemeinsamer Ausschuss von ISO und IEC, der speziell fuer Normung im Bereich der Informationstechnologie zustaendig ist]
JTM
Job Transfer and Manipulation
JVM
Java Virtual Machine

K

KB
Knowledge Based
KDC
Key Distribution Center [installed at a Kerberos server system]
KDP
Kansai Digital Phone Co. [in Osaka, Japan]
KDS
Key Distribution Service [part of the DCE security service]
KIT
(German) Kernsoftware fuer Intelligente Terminals [improved BTX standard]
KMC
Key Management Center [part of a central security facility for key generation and distribution]
KSP
K-Successively-Shortest Link-Disjoint Path
KSS
[(German) KundenSichtSystem](1)

Kunden Service Switch(2) [German]

L

L2TP
Layer 2 Tunneling Protocol [protocol allowing PPP sessions to be tunneled across an arbitrary medium to a home gateway at an ISP or corporation.]
LA
Location Area [typically a bundle of neighboured BTSs]
LAC
Local Area Communications(1)

L2TP Access Concentrator(2)
Local Access Concentrator(3)
LAL
Log Access Library [internal module, developed for the HP OV DM 4.1 Event Mgmt system, for developing custom log retrieval modules]
LAM
Lobe Access Module
LAN
Local Area Network
LANE
Local Area Network Emulation [LAN emulation on a ATM network]
LAP-B
Link Access Procedure - Balanced
LAP-D
Link Access Procedure - ? [access method within ISDN for level 2 of the OSI model]
LAPD
Link Access Protocol for the D channel
LATA
Local Access and Transport Area [(german) Gebiet, in dem ein Telekommunikationsanbieter Dienste offeriert]
LBS
Location Based Services [services based on locating a mobile phone either assisted by GSM or other means. Fostered by the fact, that by Oct. 2001 all US cellular operators are mandated to be able provide to the emergency services the location of the caller to within a radius of 125 m in nearly 70 % of cases]
LC
Local Currency
LCN
Local Communication Network
LCP
Link Control Protocol [a Data Link Connection]
LCS
Large Computer Strategies
LCSN
Local Computer Services Network
LDAP
Lightweight Directory Access Protocol [describes easy access by clients to X.500 services; see also RFC 1959]
LDBL
Low Density Bail-Lock [50 pin]
LDC
Long Distance Carrier [in USA; AT&T, MCI, Sprint]
LDS
Local Digital Switch
LE
Layer Entity(1)

Local Exchange(2)
LEC
Locale Exchange Carrier(1) [handle local call switching, complemented by LDCs]

LAN Emulation Client(2)
LECS
LAN Emulation Configuration Server
LEN
Line Equipment Number
LEO
Low Earth Orbiting (satellite) [as used in IRIDIUM (780 km), TELEDESIC (700 KM), GLOBALSTAR (1400 km), in general: 700 to 2000 km above ground]
LES
Land Earth Station(1) [for MSS, e.g. Inmarsat relay stations]

LAN Emulation Server(2)
LF
Login Facility(1) [part of the DCE security service]

Line Feed(2)
LFS
Log structured File System [transaction oriented file system; similar to JFS]
LGI
Logistics Group International [one of 3 German CPO distribution companies]
LHS
Left-Hand Side
LI
Length Indicator [part of MSU]
LIDB
Line Information Data Base
LIP
Line Interconnection Point
LLA
Link Level Access(1)

Logical Layered Architecture(2) [a development concept based upon hierarchical principles in which the architecture can be thought of as being based on a series of layers; the scope of each layer is broader than the layer below it]
LLC
Logical Link Control(1) [based on IEEE 802.2]

Low Layer Compatibility(2)
Lower Layer Capabilities(3)
LLP
Low Level Parser [in FMP1.1: formatter, parses events to identify the message class]
LLR
Local Location Register
LME
Layer Management Entity
LNB
Low Noise Block converter [transposes satellite into wire frequencies]
LOB
Lines Of Business
LOF
Loss Of Frame
LOS
Line Of Sight [surveying method for mobile communication]
LP
Linear Programming(1)

Layer Protocol(2)
LPO
Logical Post Office
LRF
Local Registration File [OV background process oriented]
LS
Lock Server [used by EMN]
LSG
Laserjet Solutions Group [HP entity]
LSS
Large Storage Systems
LSSGR
Lata Switching Systems Generic Requirements
LSSU
Link Status Signal Unit [Zeichengabestreckenzustandszeicheneinheit (German), part of SS7]
LSU
LAN Service Unitd
LSZ
Leitungsschluesselzahl (German) [3 digits, part of LTGBEZ]
LT
Line Termination [(German) Gegenstück zum Netzabschluss in der Vermittlungsstelle]
LTE
Line Terminating Equipment
LTG
Line/Trunk Group [Anschlussgruppen (German)]
LTGBEZ
Leitungsbezeichnung (German) [40 digits: 4d LSZ, 16d Ordnungsnummer, 10d BSZ-A, 10d BSZ-B]
LTS
Local Time Server [provides time in a LAN]
LTU
Licence To Use
LU
Logical Unit
LVM
Logical Volume Manager
LWG
Logical Work Group
LWL
LichtWellenLeiter (German)
LZW
Lempel Zev Welch [compression technology]

M

M
Mandatory(1)

Modulator(2)
M-BRI
Mixed Basic Rate Interface
MA
Map Application(1) [part of FMP(2)]

Manager Agent(2)
MAC
Media Access Control(1)

Message Authentity Check(2)
Message Authentication Code(3)
MAF
Management Application Function [implements actually TMN management services, act in the role of a manger or agent, see CCITT Rec. M.3010]
MAIO
Mobile Allocation Index Offset
MAN
Metropolitan Area Network [based on IEEE 802.6 standard, 1.5Mb/s to 140 Mb/s]

Mobitex Access Number(2)
MAP
Multiplexsystem-Anpassungsschaltung (German)(1)

Mobile Application Part(2)
Manufacturing Automation Protocol(3) [influenced by