\\ More than 3500 Telecom abbreviations maintained by Ioan (Nini) Indreias // 1 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 All words R5 Release 5 of the 3GPP standards (GSM - UMTS) R6 Release 6 of the 3GPP standards R Ring R Router RAC Real Application Cluster RAC Real Application Cluster (Database) RAC Resource Available Confirmation RACE Research in Advanced Communications in Europe RACF Remote Access to Call Forwarding RACH Random Access Channel (GSM) RAD Receive Adress RAD Remote Antenna Driver RADIUS Remote Authentication Dial-In User Service RADN Remote Access Dialing Number RAI Remote Alarm Indication RAI Resource Available Indication RAID Redundant Array of Inexpensive/ Independent Disks RAID Redundant Array of Inexpensive/Independent Disks RAL Resale Access Line RALB Resource All Busy RAM Random Access Memory RAO Revenue/Regional Accounting Office RARP Reverse Address Resolution Protocol (IETF) RAS Registration, Admission, and Status RAS Registration, Admission, Status RAS Remote Access Server/Service RASP Remote Antenna Signal Processing RAT Radio Access Technology (GSM - UMTS) RBEF Read Block Error counter for Far end RBEN Read Block Error counter for Near end RBOC Regional Bell Operating Company RBS Robbed Bit Signaling RBSU ROM-Based Setup Utility RBSU ROM-Based Setup Utility (HP) RC Radio Control RC Receiver Signal Element Timing (EIA-232-E) RC Recurring Charges RC Retransmission Counter RC Ringing Circuit RCA Radio Corporation of America RCC Radio Common Carrier RCC Reverse Control Channel RCE Remote Channel Extenders RCF Registration Confirm (RAS) RCF Remote Call Forwarding RCF Routing Control Field RCI Rate Center Inconsistency RCMAC Recent Change Memory Administration Center RCRMS Revenue Collection Risk Management System RCU Remote Cell Unit RCV Receive RCVR Receiver Sequence Number RD Receive Data RD Received Data (EIA-232-E) RD Request Disconnect (HDLC) RD Routing Domain RDAC Remote Digital Access Center RDBMS Relational DabaBase Management System RDC Regional Data Center RDF Remote Distribution Frame RDF Route Designator Field RDI-L Remote Defect Indicator-Loop RDI-P Remote Defect Indicator-Path RDI-V Remote Defect Indicator-Virtual RDI Remote Defect Indicator RDMS Relational Database Management System (Database) RDP Remote Desktop Protocol RDPL Remote Desktop Protocol RDSS Radio Determination Satellite Service RDT Remote Digital Terminal RDTD Restricted Differential Time Delay RDU Remote Distribution Unit RE Relaying Entity REC RECeiver REGNOT Registration Notification REJ Reject (HDLC) RELP Regular pulse Excitation Linear Prediction coding REM Ring Error Monitor REN Ringer Equivalent Number REP Repeat RESP Response RET Returning RF Radio Frequency RFA Request For Action RFC Request For Comment RFC Request For Comments (IETF) RFH Remote Frame Handler (ISDN) RFI Radio Frequency Interference RFI Request For Information RFP Radio Fixed Part RFP Request For Proposal RFQ Request For Quote RG Research Group RG Ring Ground RGM Resource Group Manager (Sun Cluster) RGW Residential Gateway RH Request/Response Header RHC Regional Holding Company RI Ring In (Token Ring MAU) RI Ring Indicator (EIA-232-E) RI Route Index RIB Remote Insight Board RIBCL Remote Insight Board Command Language RIF Routing Information Field (Source Routing) RII Routing Information Indicator (Source Routing) RILOE Remote Insight Lights-Out Edition (HP) RIM Request Initializaiton Mode (HDLC) RIP Routing Information Protocol RIP Routing Information Protocol (IETF) RIPE Réseau IP Européen RISC Reduced Instruction Set Computer RISC Reduced Instruction Set Computer/Computing RJE Remote Job Entry RLCI Receive Line Clock Input RLDI Receive Line Data Input RLM Redundant Link Management RLSD Received Line Signal Detect (EIA-232-E) RM Resource Management RMAN Recovery Manager (Database) RMATS Remote Maintenance And Testing System RMDR Remainder RMON Remote Monitoring RMS Root Mean Square RN Reference Noise RNC Radio Network Controller (UMTS) RNR Receiver Not Ready (HDLC) RO Ring Out (Token Ring MAU) ROCP Residence Optional Calling Plan ROH Receiver Off Hook ROI Return On Investment ROM Read Only Memory ROMP Remote Operations Microprocessor ROR Rate of Return ROS Remote Operations Service ROSE Remote Operation Service Element (Application Layer) ROTL Remote Office Test Line ROUTREQ Routing Request ROW Right Of Way RP Radio Part RP Route Processor (Cisco) RPC Remote Procedure Call RPCU Radio Port Control Unit RPE-LTP Regular Pulse Excitation-Long Term Prediction (GSM) RPM Resource Prioritization Manager RPOA Recognized Private Operating Agency RPR Resilient Packet Ring RPS Ring Parameter Server RR Receiver Ready (HDLC) RRJ Registration Reject (RAS) RRM Radio Resource Management RRQ Registration Request (RAS) RRQ Return Request RRUD Residence Resale Usage Discounts RS-232C Recommended Standard-232C serial communications standard RS1 Radiofone Services, LLC RSA Rivest, Shamir and Adleman (encryption) RSA Rural Serving Area RSA Rural Statistical Area RSAP Resale Service Area Plan RSCS Remote Time Spooling Communications Subsystem RSCV Route Selection Control Vector RSL Radio Signaling Link RSL Received Signal Level RSM Remote Server Management RSM Remote Switching Module RSM Remote Switching Module (telephony) RSP Repair Service Bureau RSP Route/Switch Processor (Cisco) RSS Remote Switching (Sub)System RSS Remote Switching Sites RSS Remote Switching System RSU Remote Switching Unit RSUP Reliable SAP Update Protocol (Cisco) RSVP Resource Reservation Protocol RSX Real-Time Resource Sharing Executive RSZI Regional Subscription Zone Identity RT Remote Terminal RT Rotation Time RT Routing Type RTA Remote Trunk Arrangement RTA Rural Trading Area RTAD Remote Test Access Data RTB Retransmission Buffer RTC Run Time Control RTCP Real-Time Transport Control Protocol RTF Rich Text Format RTMP Routing Table Maintenance Protocol (AppleTalk) RTP Real-Time Transport Portocol RTP Real-Time Transport Protocol RTP Realtime Transport Protocol RTP Routing Update Protocol (VINES) RTR Retransmission indicator RTS Referral Tracking System RTS Request To Send (EIA-232-E) RTSE Remote Transfer Service Element (Application Layer) RTSP Real-time Streaming Protocol RTU Remote test Unit RU Request/Response Unit RVI Reverse Interrupt (BISYNC) RW Receiver Window RX Receive RZ Return to Zero SMBZ - SaMBoZaur - test for propagation of define: