ETACS (Extended Total Access Communications System)

A version of the TACS 1G analog cel-

lular radio technology developed for use in the United Kingdom. ETACS operates in the 900 MHz band, employs frequency modulation (FM), and supports 1,000 channels of 25 kHz. As an analog system,TACS

derives channels using frequency division multiple access (FDMA) and bidirectional communications is achieved through frequency division duplex (FDD) with the downlink in the 916–949 MHz band and the uplink in the 871–904 MHz band. See also 1G, analog, cellular radio, downlink, FDD, FDMA, FM, narrowband, TACS, and uplink.

• architecture
• archiving
• ARCNET (Attached Resource Computer NETwork)
• area code
• area code
• area code
• ARIN (American Registry for Internet Numbers)
• arithmetic coding
• arithmetic logic unit (ALU)
• armored cable
• .arpa (address routing and parameter area)
• ARP (Address Resolution Protocol)
• ARPANET (Advanced Research Project Agency NETwork)
• ARPA protocol suite
• ARQ (Automatic Repeat reQuest)
• ARS (Automatic Route Selection)
• artifact
• AS (Autonomous System)
• ASCII (American Standard Code for Information Interchange)
• ASCII (American Standard Code for Information Interchange)
• ASCII (American Standard Code for Information Interchange)
• Ashbacker Radio Corporation vs. the FCC
• Asia Pacific Network Information Center (APNIC)
• ASIC (Application-Specific Integrated Circuit)
• ASK (Amplitude Shift Keying)