| 单词 | AMPS (Advanced Mobile Phone System) |
| 释义 | AMPS (Advanced Mobile Phone System) A 1G analog cellular radio standard developed by Motorola and AT&T, and operating on 50 MHz of spectrum in the 800 MHz band. In the United States, 25 MHz and 333 (416 in some areas) channels each were provided to the A Carrier, or non-wireline carrier, and the B Carrier, or wireline carrier. Of the total number of channels awarded to each carrier, 21 channels are non-conversational channels dedicated to call setup, handoff, and teardown.The remaining 74570c01.qxd 9/12/07 12:34 AM Page 32 |
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