-N-
N	Newtons
NA	Network Aspects (ETSI TC)
NA	North America
NAB	National Association Of Broadcasters
NACK	Negative Acknowledgment
NACLA	National Cooperation for Laboratory Accreditation
NAFTA	North American Free Trade Agreement
NAG	Network Architecture Group (DSL Forum)
NAG	Network Reference Models, Acronyms and Definitions, and Guide to Standards Ad Hoc (TIA TR-45)
NAI	Network Access Identifier (RFC 2468)
NAK	Negative Acknowledgment
NAK-NS	Negative Acknowledgment - Not Supported
NAK-NU	Negative Acknowledgment - Not Understood
NAL	Network Adaptation Layer
NALAG	Network Adaptation Layer Ad hoc Group
NAM	Number Assignment Module
NAMPS	Narrowband AMPS
NANC	North American Numbering Council
NANP	North American Numbering Plan
NANPA	North American Numbering Plan Administrator
NAP	Network Access Provider
NAPT	Network Address Port Translation
NAPTR	Naming Authority Pointer
NAR	Numbering, Addressing and Routing Committee of ETSI NA2
NASNA	National Association of State 9-1-1 Administrators
NAS	Network Access Servers
NASRNG	Network Access Server Requirements
NAT	Network Address Translation
NATA	North American Telephone Association
NATO	North Atlantic Treaty Organization
NAVDEC	Network Access Server and Voice on IP Device Control
NA/WCPE	North American WCPE
NB	Narrow Band
NBC	Non-backward Compatible
NBDG	New Business Development Group
NBS	Net Broadcast Service
NBS	Network Based Solution
NBSP	NarrowBand Signal Power
NC	Network Codes
NCA	Non-Call Associated
NCAG	Network Commonality Ad Hoc Group
NCC	Network Control Center
NCG	Number Consulting Group (Bellcore)
NCaps	Capabilities with No sub-fields
NCAS	Non-Call Associated Signaling
NCITS	National Committee for Information Technology Standards
NCP	Network Connection Point
NCRP	National Council of Radiation Protection and Measurement
NCS	Network Call Signaling
NCS	Nurse Call System
NCTA	National Cable Television Association
NCTE	Network Circuit Terminating Equipment
ND	NSF Message data Indication
NDA	Non-Disclosure Agreement
NDB	Networked DataBase Service
NDC	National Destination Code (ITU)
NDIS	Network Driver Interface Specification
NDSS	Network Directed System Selection
NE	Network Element
NEBS	Network Equipment Building System, a Bellcore environmental requirements specification
NEC	National Electric Code (U.S.)
NECA	National Electrical Contractors Association
NECA	National Exchange Carrier Association
NECQ	National Electronic Components Quality Assessment System
NE-EC	Near End - Echo Canceller
NEMA	National Electrical Manufacturers Association
NENA	National Emergency Number Association
NESC	National Electric Safety Code
NET	Norme Europeenne de Telecommunication
NEW FORUM	Former COCOM
NEXT	Near End Cross Talk
NFPA	National Fire Protection Agency
ng	Next Generation
NGDLC	Next Generation Digital Loop Carrier
NGN	Next Generation Network
NGN SG	Next Generation Network Starter Group
NGNA	Next Generation Network Access
NGN-IG	Next Generation Network Implementation Group
NGOF	Next Generation Optical Fiber
NGOSS	New Generation Operations Support Systems (TM Forum)
NGSO	Non-Geostationary Satellite Orbit
NHRP	Next Hop Resolution Protocol
NHTSA	National Highway Traffic Safety Administration
NI	National ISDN
NI	Network Interface
NIA	Network Indicate Address (H.230)
NIBS	National Institute for Building Standards
NIC	Network Interface Card
NID	Network Identification
NID	Network Interface Device
NID	Network Interface or Demarcation
NIDAB	Narrow Band Digital Broadcasting
NII	National Information Infrastructure
NIO	Network Input Output
NIP	Number Identification Presentation
NISDN	National ISDN
NIST	National Institute of Standards and Technology (US)
N-ISDN	Narrowband ISDN
N-ISUP	Narrowband ISDN User Part
NIU	Network Interface Unit
NIUF	North American ISDN Users Forum
NLA	Next-Level Aggregation (RFC2450)
NLD	Non-Linear Distortion
N-LLC	Narrowband Logical Link Control
NLP	Non-Linear Processor
nm	Nanometer
NM	Network Management
NMAG	Network Management Ad hoc Group
NMC	Network Management Center
NMC	Network Model Coverage
NMDS	Narrowband Multi-service Delivery System
NMF	Network Management Forum
NMS	Network Management System
NMSI	National Mobile Station Identification
NMT	Nordic Mobile Telephony
NMX	Normas Mexicanas (non-mandatory Mexican standard)
NNI	Network to Network Interface
NO PROBLEM	NOn PROprietary reliaBLe Electronic Mail
NOA	Nature of Address
NOF	Network Operations Forum
NOI	Notice of Inquiry
NOM	Mexican National Standards
NP	Network Provider
NP	Non-Public
NP	Number Portability
NPA	Network Provider Access
NPA	Numbering Plan Area
NPI	Numbering Plan Indicator
NPID	Network Provider Identification
NPR	Noise Power Ratio
NPRM	Notice of Proposed Rule Making (FCC)
NPRP	Number Portability Routing Protocol (ETSI TIPHON Project)
NR	No Reference
NR	Noise Reduction
NR	Nordstrom-Robinson (FEC)
NRA	National Regulatory Authority
NRC	Negotiated Rulemaking Committee
NRC	Network Reliability Council
NRIC	National Reliability and Interoperability Commission (US)
NRM	Network Reference Model
NRTL	Nationally Recognized Testing Laboratory
NRZ	Non-Return to Zero
NRZI	Non-Return to Zero on Ones
NS-cap	Non-Standard capability
NS/EP	National Security and Emergency Preparedness
NSA	National Security Agency (U.S.)
NSAP	Network Service Access Point
NSB	National Standardization Body
NSC	Non-Standard Facilities Command
NS/EP	National Security/Emergency Preparedness
NSF	Network-Specific Facilities
NSF	Non-Standard Facilities
NSIE	Network Security Information Exchange
NSIS	Next Steps In Signaling
NSMA	National Spectrum Managers Association
NSO	National Standard Organization
NSP	Network Service Provider
NSRA	Normal Seamless Rate Adaptation
NSRP	Numbered SRP response frames
NSS	Non-Standard Setup
NSTAC	National Security Telecommunications Advisory Committee
NT	Network Termination
NTCA	National Telephone Cooperative Association
NTE	Network Terminating Equipment
NTIA	National Telecommunications and Information Administration
NTP	Network Termination Point
NTP	Network Time Protocol
NTQ	Near Toll Quality
NTR	Network Timing Reference
NTRAC	New Technical Regulations Approval Committee (former TRAC), ETSI
NTSC	National Television System Committee
NTT	Nippon Telephone and Telegraph
NTU	Network Terminating Unit
NVCASE	National Voluntary Conformity Assessment System Evaluation
NVLAP	National Voluntary Laboratory Accreditation Program
NVOD	Near Video on Demand
NVRAM	Non-Volatile RAM
NWI	New Work Item
NWK	Network, Layer 3 of the WCPE protocol stack
NYCE	Certification Body accredited by SECOFI (Mexico)
-O-
O&M	Operations and Maintenance
O&NM	Operations and Network Management working group (DSL Forum)
O&P	Ordering & Provisioning Committee (ATIS)
O/E	Optical/Electrical converter
OA&M	Operations, Administration, and Maintenance
OAA	On Air Activation
OAM	Operations, Administration, and Maintenance
OAM&P	Operations, Administration, Maintenance & Provisioning
OAN	Optical Access Network
OAP	One step Approval Procedure (ETSI)
OAS	Organization of American States
OATS	Over-the-Air Activation TeleService
OBMC	Overlapped Block Motion Compensation
OBF	Ordering and Billing Forum
OBP	On-Board Processing
OC	Operation Channel
OCAP	OpenCable Applications Platform
OCCS	Overall Construction Classification System
OCD	Out of Cell Delineation (UNI 3.0)
OCDMA	Orthogonal CDMA
OCG	Operational Coordination Group (ETSI)
OCG	Overall Coordination Group
OCI	Open Circuit Interval
OCR	Optical Character Recognition
ODA	Open Document Architecture
ODBC	Open DataBase Connectivity
ODL	Object Definition Language
ODN	Optical Distribution Network (G.983.1)
ODP	Open Distributed Processing
ODP	Originator Detection Pattern (V.42)
ODTC	Office of Defense Trade Controls (US)
OEM	Original Equipment Manufacturer
OET	Office of Engineering and Technology (FCC)
OFB	Output Feedback
OFDM	Orthogonal Frequency Division Multiplexing
OFS	Operational Fixed Service (Microwave)
OFSTP	Optical Fiber Systems Test Procedure
Oftel	British Office of Telecommunications
OGM	Out-Going Message
OHG	Operator Harmonization Group
OHAN	International Conference of Optical Hybrid Access Networks
OI	Outline of Investigation
OID	Object Identifiers
OIF	Optical Internetworking Forum
OIW	Open Systems Implementers Workshop
OJ	Official Journal
OJEC	Official Journal of the European Communities
OLC	Open Logical Channel
OLR	On-Line Reconfiguration
OLR	Overall Loudness Rating
OLT	Optical Line Termination
OM	Object Model
OM	Optical fiber Multimode category
OMCC	ONT Management and Control Channel
OMCI	ONT Management and Control Interface (G.983.2)
OMG	Object Management Group
OMT	Overhead Message Train
ONE	Other Network Entities (Omega Networks)
ONP	Open Network Provision
ONS	On Premise Station
ONT	Optical Network Termination
ONU	Optical Network Unit
OOB	Out of Band
OOF	Out of Frame
OPASTCO	Organization for the Promotoion and Advancement of Small Telecommunications Companies
OpenVoB	Voice over Broadband http://www.openvob.org
OPS	Off Premise Station
OPTIS	Overlapped PAM Transmission with InterlockingSpectra
OPTS	Over-the-Air Programming Teleservice
O-QAM	Orthogonally multiplexed QAM
ORDQ	Order Qualification
ORREQ	Origination Request
OS	Operating System
OS	Optical fiber Singlemode category
OSA	Open Service Architecture (3GPP)
OSH	Occupational Safety and Health
OSHA	Occupational Safety and Health Administration (U.S.)
OSI	Open Switching Interval
OSI	Open System Interconnection
OSN	One Stop Notification
OSP	Open Settlement Protocol
OSP	OutSide Plant
OSPF	Open Shortest Path First
OSS	Operations Support Systems
OTA	Over-the-Air Activation
OTAFG	OTA Focus Group
OTAPA	Over-the-Air Parameter Administration
OTAR	Over-the-Air Rekeying (APCO Project 25)
OTASP	OTA Service Provisioning
OTDR	Optical Time Domain Reflectometer
OTFI	One Time Feature Indicator
OTI	Open Telecom Infrastructure
OTN	Optical Network Terminal
OTNT	Optical Transport Networks and Technologies
OVR	Overall Transmission Quality Rating (R)
-P-
P	Predicted (JVT)
P&A	Privacy and Authentication
PA	Partial Agreement
PA	Pass Along (Operation code)
PABX	Private Automatic Branch eXchange
PAC	Program Advisory Committee
PACA	Priority Access and Channel Assignment
PACA-E	Enhanced Priority Access and Channel Assignment Supplement Service
PACC	Partition, Aggregation and Conditional Coding
PACS	Personal Access Communications System, Licensed Band
PAC-U	Personal Access Communications System, Unlicensed Band
PAD	Packet Assembler Disassembler
PAG	Practical Application Guidelines
PAGODA	Profile Alignment Group on ODA
PAL	Phase Alteration Line
PAM	Pulse Amplitude Modulation
PAMS	Perceptual Analysis/Measurement System
PAR	Peak to Average Ratio
PAR	Pixel Aspect Ratio
PARLAY	open, multi-vendor forum organized to create open, technology independent Application Programming Interfaces (APIs) http://www.parlay.org
PAS	Publicly Available Specification
PASC	PCS Access Service for Radio Controllers
PAT	Port Address Translation
PB	Personal Base
PB	Predicted and Bi-directional
PBNM	Policy Based Network Management
PBO	Power Back Off
PBS	Personal Base Station
PBX	Private Branch Exchange
PC	Personal Computer
PC	Protocol Council (ICANN PSO)
PC_SSN	Point Code Sub-System Number
PCA	Password Call Acceptance
PCA	Policy Group proposal on CA
PCB	Power Cut Back
PCC	Per Call Control
PCC	Pre-activation Communications Channel
PCC	Private Control Channel
PCC 1	Permanent Consultative Committee (CITEL)
PCCA	PCMCIA Communication Card Association
PCCA	Portable Computer Communications Association
PCCC	Parallel Concatenated Convolutional Codes
PCE	PER Complete Encoding
PCF	Personal Call Forwarding
PCF	Picture Clock Frequency
PCH	Paging Channel
PCI	Peripheral Component Interconnect
PCI	Programmable Communications Interface
PCI	Protocol Capability Indicator
PCIC	Petroleum and Chemical Technical Conference (IEEE IAS)
PCI SIG	Peripheral Component Interconnect Special Interest Group
PCIA	Personal Communications Industry Association
PCL	Power Line Communication
PCM	Pulse Code Modulation
PCMCIA	Personal Computer Memory Card International Association
PCME	Packet Circuit Multiplication Equipment
PCN	Personal Communications Network
PCR	Program Clock Reference
PCLEV	Picture-Level
PCS	Personal Communication Services
PCSAP	PCS Application
PCSC	Personal Communications Switching Center
PCSD	Personal Communications Services Description
PCT	Pairwise Correlating Transform
PD	Plugfest Document
PD	Powered Device
PD	Proposed Draft
PDAM	Proposed Draft Amendment
PDC	Personal Digital Cellular
PDD	Post Dial Delay
PDE	Position Determining Entity
PDE	Primary Designated Engineer (UL)
PDF	Portable Document Format
PDF	Probability Density Function
pdf	probability distribution function
PDH	Plesiocronous Digital Hierachy
PDH	Primary Digital Hierachy
PDL	Polarization Dependent Loss
PDN	Packet Data Network
PDS	Phase Dithering Sequence
PDU	Protocol Data Unit
PDTR	Proposed Draft Technical Report
PDU-MUX	Protocol Data Unit Multiplexer
PDV	Packet Delay Variation
PE	Policy Enforcement element
PE	Poly Ethylene
PE	Public Inquiry (ETSI)
PEAQ	Perceptual Evaluation of Audio Quality (ITU-R rec. BS.1387)
PED	Portable Electronic Device
PEF	Proxy Element Function
PER	Packed Encoding Rules
PER	Parameter Error Rate
PES	Program Elementary Stream
PESQ	Perceptual Evaluation of Speech Quality
PEX	ETSI Help Desk for Conformance
PEXT	Premises End Crosstalk
PF	Presence Function
PFD	Power-flux Density
PFGS	Progressive FGS
PFMA	Programmable Frequency for Multiple Access-nodes
PHB	Per-Hop forwarding Behavior
PHCF	Hard Polymer Clad Fiber
PHP	Personal Handy Phone
PHS	Personal Handyphone System
PHY	Physical Layer
PIB	Personal Information Base
PIC	Primary / Presubscribed Interexchange Carrier
PICLEV	Picture-Level
PICS	Protocol Implementation Conformance Statement
PID	Protocol ID
PIN	Personal Identification Number
PIN	T.30 procedural interupt negative
PINS	Project Initiation Notification System (TIA)
PINT	PSTN Interworking (IETF)
PINX	Private Integrated Network Exchange
PIP	T.30 procedural interupt positive
PISN	Private Integrated Services Network
PIXIT	Profile Initialization for Test Cases
PKCS	Public Key Cryptography Standards
PKI	Public Key Infrastructure
PL	Physical Layer
PL	Preferred Language
PL	Program Lock
PLAR	Private Line Auto Ring
PLC	Packet Loss Concealment
PLC	Power Line Communication
PLI	Power Line Interference
PLL	Phase Locked Loop
PLMN	Public Land Mobile Network
PLMTS	Public Land Mobile Telecommunications System
PLOAM	Physical Layer Operations, Administrations and Maintenance
PLS	Physical Layer Specification
PLT	PowerLine Telecommunications
PM	Phase Modulation
PM	Performance Management (ATM Forum)
PM	Processable Mode
PMC	Packet Mode Channel
PMC	Project Management Committee (ETSI)
PMCC	Packet Mode Channel Connect
PMCE	Packet Mode Channel Element
PMCH	Packet Mode Channel Call Control
PMCH	Packet Mode Channel Handler
PMD	Physical Media Dependent sublayer
PMD	Polarization Mode Dispersion
PMF	probability mass function
PMM	Protocol Management Module
PMMS	Power Measurement Modulation Session
PMP	Point to MultiPoint
PMR	Peak-to-Mean Ratio
PMS	Physical Media Specific
PMS-TC	Physical Media Specific - Transmission Convergence
PMT	Program Management Team
PN	Project Number (TIA)
PNE	Production of Norms in Europe
PNNI	Private Network to Network Interface
P-n-P	Plug and Play
PNT	Phone-line Network Transceiver
POC	Points of Contact (LBC)
POC	Postal Operations Council
POC	Proof-of concept
POC	Public Operator's Code
POCSAG	Post Office Code Standardization Advisory Group (UK)
PoD	Packet transport over DSL
PoDSL	Packet over DSL
POF	Plastic Optical Fiber
POF	Private Operating Frequencies
PON	Passive Optical Network
POP	PreOrder Process transaction (DSL Forum)
POPs	Points of Presence
POS	Packet-over-SONET
POTS	Plain Old Telephone Service
PoV	Packet over VDSL
PoV-TC	Packet over VDSL - Transmission Convergence Layer
PoW	Poor or Worse
PP	Portable Part
PPAG	Public Policy Advisory Group (DSL Forum)
PPD	Proposal Package Description
PPDN	Public Packet Data Network
PPI	PCS to PCS Interference
PPM	Parts Per Million
PPP	Point-to-Point Protocol (IETF)
PPPoA	PPP over ATM
PPPoE	Point to Point Protocol over Ethernet
pps	pulses per second
PQ	Priority Queuing
PR	Pseudo Random
PR	Public Relations
PR&A	Project Request and Authorization
PRA	Primary Rate Access
PRBS	Pseudo-Random Bit Sequence
PRC	Premium Rate Charging
PRC	Private Channel
PRD	Pseudo-Random Downstream Sequence
PRI	Primary Rate Interface (ISDN)
PRM	Performance Report Messages
PRNS	Pseudo Random Noise Sequence
PRO	Planning and Reporting Officer
PROM	Programmable ROM
PS	PCSC ISDN Switch
PS	Portal Services (Q14/9, MediaHomeNet)
PS	Product Safety
PSA	Polled SubAddress
PSAP	Public Safety Answering Point
PSC	Picture Start Code
PSD	Power Spectral Density
PSDN	Public Switched Data Network
PSDS	Public Switched Digital Service
PSE	Power Source Element
PSE	Power Sourcing Equipment
PSELFEXT	Power Sum Equal Level Far-end Crosstalk
PSI-CELP	Pitch Synchronous Innovation CELP
PSID	Private System ID
PSIDS	Private System ID Service
PSK	Phase Shift Key
PSL	Panasonic Singapore Laboratories
PSN	Private Switched Network
PSNEXT	Power Sum Near-end Crosstalk
PSNR	Peak Signal to Noise Ratio
PSO	Protocol Supporting Organization
PSP	Public Service Profiles
PSPDN	Packet Switched Public Data Network
PSQM	Perceptual Speech Quality Measure (ITU Rec. P.861)
PSS1	Private Network Signaling System 1, defined by ISO
PST	PON Section Trace
PSTN	Public Switched Telephone Network
PSWG	Product Safety Working Group (Trilateral)
PT	Payload Type
PT	Portable radio Terminal
PT	Project Team (ETSI)
PTC	PictureTel Transform Coder
PTC	Positive Temperature Coefficient (K.30)
PTCC	Pex & Testing Competence Center (ETSI)
PTM	Packet Transfer Mode
PTM	Packet Transport Mode
PTM-TC	Packet Transfer Mode Ð Transmission Convergence
PTN	Public Telecommunications Network (TIPHON)
PTN	Private Telecommunications Organizations
PTNO	Public Telecommunications Network Operator (TIPHON)
PTO	Private Telecommunications Organizations
PTPCP	Peer-To-Peer Control Protocols
PTS	Pay Terminals and System
PTS	Payphone Terminals and System
PTS	Pay Terminal System
PTSP	PNNI Topology State Packet
PTT	Public Telephone and Telegraph
PTT	Push to Talk
PUA	Personal User Agent
PUC	Public Utilities Commission
PUM	Personal User Mobility
PVC	Permanent Virtual Circuit
PVC	Poly Vinyl Chloride
PVR	Personal Versatile Recorder
PWA	Password Access
PWD	Password (T.30)
PWG	Printer Work Group
PWT	Personal Wireless Telecommunications
PWT-E	Personal Wireless Telecommunications - Enhanced Interoperability Standard
-Q-
Q&A	Question and Answer
QA	Quality Agent
QADM	Quadrature Audio Data Modulation (VoiceSpan [TM])
QAM	Quadrature Amplitude Modulation
QBD	QoS Bearer Descriptor
QC	Quick Connect
QCA	Quick Connect Acknowledge
QCELP	Qualcomm's proprietary version of CELP
QCIF	Quarter CIF
QLN	Quiet Line Noise (G.dmt.bis)
QLN-ps	Quiet Line Noise per subcarrier
Q-Mode	Quiescent Mode (Q4/15)
QOC	Qualification Oversight Committee (DSL Forum)
QoS	Quality of Service (also QOS)
QoSM	Quality of Service Manager
QP	Quantization Parameter (H.262)
QPSK	Quadrature Phase Shift Keying
QS	Quality Scalability
QSDG	Quality of Service Development Group
QSIG	The signaling protocol used at the Q-interface between two switches in a private network. ECMA/ISO have defined a set of QSIG standards.
QUANT	Quantization parameter
QUEST	Quality Excellence for Suppliers of Telecommunications
-R-
R&D	Research and Development
R&O	Report and Order
R&TTE	Radio and TTE (Telecommunications Terminal Equipment) Directive
RA	Radio Access
RA	Radiocommunication Assemblies
RAB	Registrar Accreditation Board
RACF	Radio Access Control Function
RACH	Random Access Channel
RADIUS	Remote Access Dial-In User Server (IETF)
RADSL	Rate-Adapting ADSL
RAI	Remote Alarm Indication
RAL	Restricted Access Location
RAM	Random Access Memory
RAM	Remote Access Multiplexer (DSL Forum)
RAMA	Resource Auction Multiple Access
RAN	Radio Access Network
RAND	Random Challenge Memory
RAS	Registration, Administration, and Status
RAS	Remote Access Server
RASC	Radio Access System Controller
RAST	Receive And Send Terminal
RATERQ	Rate Request
RB	Radiocommunications Bureau (ITU-R)
RBAF	Radio Bearer Adaptation Function
RBB	Residential BroadBand
RBER	Residual Bit Error Rate
RBTESC	Routing, Bridging, and Transfer of Emergency Service Calls
RBN	Regional Broadband Network (DSLF TR-025)
RBOC	Regional Bell Operating Company
RBS	Robbed-bit signaling
RBW	Resolution BandWidth
RC	Resistor/Capacitor
RCC	Return Channel for Cable
RCDD	Registered Communications Distribution Designer
R-CELP	Renewal CELP
RCELP	Residual CELP
RCF	Radio Control Function (T1P1)
RCF	RegistrationConfirm
RCF	Registration Control Field
RCF	Remote Call Forwarding
RCH	Random Access Channel
RCP	Radio Control Protocol
RCPC	Rate Compatible Punctured Convolutional
RCT	Return Channel Terrestrial
RD or R-D	Rate Distortion
RDC	Remote Device Control
RDD-REL	Rights Data Dictionary - Rights Expression Language
RDI	Remote Detect Indication (VC-RDI)
RDQ	Rate-Distortion constrained Quantization
RDS	Requirements Definition Study
RDT	Remote Digital Terminal
REA	Rural Electrification Association
REC	RECeive alarm
REJ	Reject
RELP	Residual Excited Linear Prediction
REN	Ringer Equivalence Number
REQ-MP	Request Mode Proposal
REQ-MR	Request Mode Request
RES	Radio Equipment Systems
RESNA	Rehabilitation Engineering and Assistive Technology Society of North America
RESCAP	Resource Capabilities discovery
REVAL	Procedure for Evaluation of Radio Technologies for FPLMTS
RF	Radio Frequency
RF	Resolution Function (TIPHON)
RFC	Designation for an IETF Standard/Document
RFC	Remote Feature Control
RFC	Request for Comments (IETF)
RFDB	Resolution Function Data Base (TIPHON)
RFER	Residual Frame Error Rate
RFI	Radio Frequency Interference
RFI	Request for Information
RFO	Remote Foreign Office
RFP	Radio Fixed Parts
RFP	Request for Proposal
RFQ	Request for Quotation
RFT	Remote Feeding Telecommunication (circuits)
RFT-C	Remote power Feeding Telecom - Current limited
RFT-V	Remote power Feeding Telecom - Voltage limited
RG	Residential Gateway
RGB	Red Green Blue
RGIP	Residential Gateway Internal Protocol
RH	Multiple HDLC Receive
RIP	Request In Process
RIPE	Regional Internet Registry for Europe
RJ	Registered Jack
RL	Return Loss
RLAN	Radio Local Area Network
RLCG	Resistance per unit length, Inductance per unit length, Capacitance per unit length, and Conductance per unit length
RLP	Radio Link Protocols
RLR	Receive Loudness Rating
RM	Simple Facsimile Receive
RMI	Remote Method Invocation
RMMIE	Remote Modem Management Information Exchange
RMOA	Realtime Multimedia Over ATM (ATM Forum)
RM-ODP	Reference Model for Open Distributed Processing
RMP	Reliable Multicast Protocol
RMS	Root Mean Square
RNR	Receiver Not Ready
ROAMOPS	Roaming Operations Task Force
ROC	Report on Comments
ROI	Region of Interest
ROLR	Receive Objective Loudness Rating
ROM	Read Only Memory
ROP	Report On Proposals
ROSE	Remote Operations Service Element (X.219 and X.229)
ROT	Receive Only Terminal
RP	Radio Ports
RP	Reference Points
RP-AS	Ringing, Pulse-Alerting Signal
RPC	Remote Procedure Call
RPCU	Radio Port Control Unit
RPE	Regular Pulse Excitation
RPF	Remote Power Feed
RpoA	Registration Point of Attachment
RPP	Reverse-Pair Positioning
RPR	Reference Picture Resampling
RPR	Resilient Packet Ring
RPS	Reference Picture Selection
RPWM	Rules of Procedure and Working Methods
RQV	Running Quality Value
RR	Resource Record (TIPHON)
RR	Reduced Reference
RR	Registration Reject
RRJ	Registration Reject
RRNR	Reduced Reference - No Reference
RRQ	Registration Request
RRU	Reduced Resolution Update
RS	Radio System
RS	Radiocommunications Sector - ITU- (CCIR)
RS	Reed-Solomon (code)
RS	Rectangular Slice
RS	Resolution Services (TIPHON)
RSA	Public Key Cryptosystem invented by Rivest, Shamir and Adleman
RSA	Rural Service Area
RSDN	Regional Switched Digital Network
RSF	Residential Standards Forum
RSGCP	Reliable Signaling Gatway Control Protocol
RSGP	Reliable Signaling Gateway Protocol
RSID	Residential System Identification
RSL	Reference System Lab
RSSI	Received Signal Strength Indication
RSUP	Reliable State Update Protocol (IETF)
RSVP	Resource Reservation Setup Protocol (IETF)
RT	Remote Terminal
RT	Round Trip
RTC	Return to Control (T.4)
RTCA	Radio Technical Commission for Aeronautics
RTCP	Real-time Transport Control Protocol (IETF)
RTD	Round Trip Delay
RTE	Remote Terminal Equipment
RTF	Radio Terminal Function
RTLM	Real Time Link Management
RTP	Real Time Transport Protocol (IETF)
RTR	Revised Technical Report (ETSI)
RTS	Request to Send
RTS	Revised Technical Specification (ETSI)
RTS-CTS	Request to Send - Clear to Send
RTSP	Real-Time Streaming Protocol
RTT	Radio Transmission Technologies
RTTE	Radio and Telecommunication Terminal Equipment
RTU	Right to Use
RTX	Request Retransmission
RTYPE	Rounding Type
RUFP	Reflected Unique Findable Pattern
RVLC	Reversible Variable Length Codes
RX	Receive
RZ-SSB	Return to Zero SSB

More Acronym Definitions: