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
|
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)
|
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
|
|
|
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
|
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
|
