IS-54 (Interim Standard 54)

A 2G digital cellular radio standard from the Electronics Industry

Alliance (EIA) and Telecommunications Industry Association (TIA) and later approved by the American National Standards Institute (ANSI) to officially become ANSI/TIA/EIA-567. IS-54 is an extension of the analog Advanced Mobile Phone System (AMPS) and is commonly known as Digital AMPS (D-AMPS) and United States Digital Cellular (USDC). IS-54 evolved into IS-136.The two standards jointly specified the time division multiple access (TDMA) method and are often referred to as TDMA. See also 2G, ANSI, cellular radio, D-AMPS, EIA, IS-136, TIA, and TDMA.

• Strowger switch
• structured wiring plan
• STS
• stuff bit
• stuttered dial tone
• subcarrier
• submarine cable
• subnet mask
• subnet (subnetwork)
• subnetting
• subnetwork (subnet)
• subrate
• Subrate Digital Loop (SRDL)
• subscriber
• subscriber identification Module (SIM)
• Subscriber Line Carrier-96 (SLC-96)
• subscriber line charge (SLC)
• suit
• superframe
• Super High Frequency (SHF)
• supernetting
• superrate
• superrate
• supervision
• supervision