Electronic Switching Systems



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N

N-AMPS

Narrowband Advanced Mobile Phone Service

NAFTA

North American Free Trade Agreement

NAK

Negative Acknowledgement

NAM

Numeric Assignment Module

NAP

Network Access Point

NAS

Network Attached Storage

NATA

North American Telecommunications Allocation

NAU

Network Addressable Unit (IBM)

NBS

National Bureau of Standards

NC

Network Computer

NCC

Network Control Center

NCP

Network Control Program (IBM SNA), or Network Control Point

NE

Network Element

NEF

Network Element Function

NEBS

New Equipment Building Specifications

NECA

National Exchange Carrier Association

NetBIOS

Network Basic Input-Output System (Microsoft)

NFS

Network File System (or Server)

NIC

Network Interface Card, or Network Information Center (Internet Registry)

NiCad

Nickel Cadmium

NiMH

Nickel-Metal Hydride

NIST

National Institute of Standards and Technology

NIU

Network Interface Unit

NLM

NetWare Loadable Module (Novell)

nm

nanometer

NM

Network Manager

NMC

Network Management Center

NMC

Nortel Matra Cellular

NMF

Network Management Forum (now TMF)

NML/NMS

Network Management Layer/Network Management Service

NMS

NetWare Management System (Novell)

NNM

Network Node Manager (Hewlett-Packard)

NOC

Network Operations Center

NOS

Network Operating System

NPI

New Product Introduction

NREN

National Research and Education Network (USA)

NRZ

Non-Return to Zero

NSA

National Security Agency

NSF

National Science Foundation (USA)

NSK

Non-Stop Kernel (Compaq)

NSS

Network Switching Sub-system (GSM)

NSSG

Network Solutions and Service Group (Nortel)

NT

Network Termination, or New Technology, also Windows NT (Microsoft)

NTE

Network Terminating Equipment

NTSA

Networking Technical Support Alliance

NTSC

National Television Standards Committee

NTU

Network Termination Unit

O

OA&M

Operations, Administration and Maintenance

OAM&P

Operations, Administration, Maintenance and Provisioning

OC

Optical Carrier

OC-1

Optical Carrier Signal, Level 1 (51.84 Mbps)

OC-3

Optical Carrier Signal, Level 3 (155.52 Mbps)

OC-9

Optical Carrier Signal, Level 9 (466.56 Mbps)

OC-12

Optical Carrier Signal, Level 12 (622.08 Mbps)

OC-18

Optical Carrier Signal, Level 18 (933.12 Mbps)

OC-24

Optical Carrier Signal, Level 24 (1.244 Gbps)

OC-36

Optical Carrier Signal, Level 36 (1.866 Gbps)

OC-48

Optical Carrier Signal, Level 48 (2.488 Gbps)

OC-96

Optical Carrier Signal, Level 96 (4.976 Gbps)

OC-192

Optical Carrier Signal, Level 192 (9.952 Gbps)

OC-256

Optical Carrier Signal, Level 256 (13.271 Gbps)

OCR

Optical Character Recognition

ODBC

Open Database Connectivity (Microsoft)

ODS

Operational Data Store

OEM

Original Equipment Manufacturer

OLAP

Online Analytical Processing

OLE

Object Linking and Embedding (Microsoft)

OMA

Object Management Architecture

OMA

Open Mobile Alliance

OMC

Operations and Maintenance Centre (GSM)

OMF

Object Management Framework

OMG

Object Management Group

OOP

Object-Oriented Programming

ORB

Object Request Broker

OS

Operating System

OS/2

Operating System/2 (IBM)

OSF

Open Software Foundation

OSI

Open Systems Interconnection (ISO), or Objective Systems Integrator

OSP

OutSide Plant

OSPF

Open Shortest Path First

OSS

Operations Support Systems

OTA

Over The Air Activation

OTD

Open Terminal Directive (European Union)

P

P2P

Person-to-Person

PABX

Private Automatic Branch eXchange

PACS

Personal Access Communications System

PAD

Packet Assembler-Disassemble

PAL

Phase Alternating by Line

PAM

Pulse Amplitude Modulation

PAN

Personal Area Network

PAP

Password Authentication Protocol

PBX

Private Branch eXchange

PC

Personal Computer

PCB

Printed Circuit Board

PCI

Peripheral Component Interconnect

PCIA

Personal Communications Industry Association

PCM

Pulse Code Modulation

PCMCIA

Personal Computer Memory Card Industry Association

PCN

Personal Communications Networks

PCS

Personal Communications Services

PDA

Personal Digital Assistant

PDC

Personal Digital Cellular (Japan)

PDE

Positioning Determination Entity

PDH

Plesiochronous Digital Hierarchy

PDN

Packet Data Network or Public Data Network

PDU

Protocol Data Unit

PM

Phase Modulation

PHY

Physical Layer

PIM

Personal Information Manager

PIN

Personal Identification Number, or Positive-Intrinsic-Negative

PLMN

Public Land Mobile Network

PMD

Physical Media-Dependent

PnP

Plug-and-Play

POP

Point Of Presence

PoS

Point Of Sale

POTS

Plain Old Telephone Service

PPC

Pay-Per-Call

PPP

Point-to-Point Protocol

PPV

Pay-Per-View

PRCS

Philips Radio Communications Systems

PRI

Primary Rate Interface (ISDN)

PROM

Programmable Read-Only Memory

PSN

Packet-Switched Network

PSTN

Public Switched Telephone Network

PSK

Phase Shift Keying

PT

Payload Type

PTT

Post, Telegraph and Telecommunications (Government Departments)

PU

Physical Unit (IBM SNA)

PUC

Public Utility Commission (USA)

PVC

Permanent Virtual Circuit

PVN

Private Virtual Network

 

 

Q

Q3

Network Management Interface (ITU-T)

QA

Quality Assurance

QEDI

Quod Erat Demonstrandum

QoS

Quality of Service

R

RACE

Research for Advanced Communications in Europe

RAID

Redundant Array of Inexpensive Disks

RAM

Random Access Memory

RBES

Rule-Based Expert Systems

RBOC

Regional Bell Operating Company (USA)

RCU

Remote Control Unit

RDBMS

Relational Database Management System

RDSS

Radio Determination Satellite Service

RF

Radio Frequency

RFC

Request For Comment (IETF)

RFI

Radio Frequency Interference, or Request For Information

RFP

Request For Proposal

RFQ

Request for Quotation

RIP

Routing Information Protocol

RISC

Reduced Instruction Set Computing

RJE

Remote Job Entry

RMON

Remote Monitoring

ROI

Return On Investment

ROM

Read-Only Memory

RPC

Remote Procedure Call

RSI

Repetative Strain Injury

RSVP

Resource ReSerVation Protocol (IETF)

RT

Remote Terminal

RTU

Right To Use

RX

Receive

S

SA

Source Address

SAA

Systems Application Architecture (IBM)

SAN

Storage Area Network or System Area Network (Himalaya)

SC

Standards Committee (ISO)

SCCP

Signaling Connection Control Point (IN)

SCE

Service Creation Environment (IN)

SCP

Service Control Point (IBM-SNA)

SCSI

Small Computer Systems Interface

SDH

Synchronous Digital Hierarchy

SDLC

Synchronous Data Link Control (IBM)

SDN

Software-Defined Network (AT&T)

SDSL

Symmetrical Digital Subscriber Line

SHF

Super High Frequency (3 GHz to 30 GHz)

S-HTTP

Service Hypertext Transport Protocol

SIM

Subscriber Identification Module

SIP

Session Initiation Protocol (IETF)

SKU

Stock-Keeping Unit

SLIC

Subscriber Loop Interface Circuit

SLIP

Serial Line Internet Protocol (IETF)

SMDS

Switched Multimegabit Data Services

SML/SMS

Service Management Layer/Service Management Service

SMR

Specialized Mobile Radio

SMS

Service Management System

SMS

Short Message Service

SMSC

Short Message Service Center

SMT

Station Management

SMTP

Simple Mail Transfer Protocol (IETF)

SN

Switching Network or Station Number

SNA

Systems Network Architecture (IBM)

SNI

Subscriber Network Interface

SNMP

Simple Network Management Protocol

SONET

Synchronous Optical Network (ANSI)

SP

Service Provider

SPA

Software Publishers Association

SPX

Sequenced Packet Exchange (Novell)

SQL

Structured Query Language

SS

Switching System

SS#7

Signaling System # 7 (ITU-T)

SS7

Signaling System 7 (ANSI)

SSCP

System Services Control Point (IBM)

SSL

Secure Sockets Layer (IETF)

SSP

Service Switching Point (IN)

STDM

Statistical Time Division Multiplexing

STM

Synchronous Transfer Mode

STP

Shielded Twisted-Pair, or Signal Transfer Point (IN)

STX

Start of Transmission

SUBT

Subscriber Terminal

SVC

Switched Virtual Circuit

S x S

Step-by-Step

SYNTRAN

Synchronous Transmission



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