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RSU Remote Switching Unit |
RTA Remote Trunking Arrangement |
RTL Resistor-Transistor Logic |
RTM Regional Telecommunications Management |
RTM Remote Test Module |
RTS Remote Testing System |
RTU Remote Trunking Unit |
RTU Right To Use |
RUM Remote User Multiplex |
RWC Remote Work Center |
RX Remote eXchange |
S Sleeve |
SAC Service Area Code |
SAC Service Area Computer |
SAC Special Area Code |
SAG Street Address Guide |
SAI Serving Area Interface |
SALI Standalone Automatic Location Identification |
SAMA Step by step Automatic Message Accounting |
SAR Store Address Register |
SARTS Switched Access Remote Test System |
SAT Special Access Termination |
SAT Supervisory Audio Tone |
SBMS Southwestern Bell Mobile Service |
SBS Skyline Business Systems |
SC Scanner Controller |
SC Sectional Center |
SCAT Stromberg-Carlson Assistance Team |
SCC Specialized Common Carrier |
SCC Switching Control Center |
SCCS Specialized Common Carrier Service |
SCCS Switching Control Center System |
SCF Selective Call Forwarding |
SCM Subscriber Carrier Module |
SCO Serving Central Office |
SCOT Stepper Central Office Tester |
SCOTS Surveillance & Control Of Transmissions System |
SCP Signal Control Point |
SCP Signal Conversion Point |
SCP System Control Program |
SCPC Signal Channel Per Carrier |
SCPD Supplementary Central Pulse Distributor |
SCU Selector Control Unit |
SCX Specialized Communications eXchange |
SD&D Specific Development & Design |
SDIS Switched Digital Integrated Service |
SDL Specification and Description Language |
SDLC Synchronous Data Link Control |
SDN Software-Defined Network |
SDOC Selective Dynamic Overload Controls |
SDP Service Delivery Point |
SDR Store Data Register |
SDS Switched Data Service |
SDS Synchronous Data Set |
SDSC Synchronous Data Set Controller |
SEAS Signaling Engineering and Administration System |
SEL SELector |
SES Service Evaluation System |
SF Single Frequency |
SFMC Satellite Facility Management Center |
SG SuperGroup |
SGML Standard Generic Markup Language |
SGMP Simple Gateway Management Protocol |
SI Status Indicator |
SIC Silicon Integrated Circuit |
SID System IDentification |
SIT Special Information Tone |
SLC Subscriber Loop Carrier |
SLE Screening Line Editor |
SLIC Subscriber Line Interface Circuit |
SLIM Subscriber Line Interface Module |
SM Switching Module |
SMAS Supplementary MAin Store |
SMAS Switched Maintenance Access System |
SMASF SMAS Frame |
SMASPU SMAS Power Unit |
SMDF Subscriber Main Distributing Frame |
SMDI Subscriber Message Desk Interface |
SMDR Station Message Detailed Recording |
SMG SuperMasterGroup |
SMS Service Management System |
SMSA Standard Metropolitan Statistical Area |
SMTP Simple Mail Transfer Protocol |
SNA System Network Architecture |
SNADS System Network Architecture Distribution Service |
SNET Southern New England Telephone |
SOAC Service Order Analysis Control |
SOC Service Oversight Center |
SOH Service Order History |
SONAR Service Order Negotiation And Retrieval |
SONDS Small Office Network Data System |
SP Signal Processor |
SP Signaling Point |
SPAN Space Physics Analysis Network |
SPAN System Performance ANalyzer |
SPC Southern Pacific Communications |
SPC Stored Program Control |
SPCS Stored Program Control Systems |
SPI Serial Peripheral Interface |
SPUC/DL Serial Peripheral Unit Controller/Data Link |
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