| 单词 | DS-0 (Digital Signal Level Zero) |
| 释义 | DS-0 (Digital Signal Level Zero) A 64 kbps channel, which is the fundamental building block of the generic digital signal hierarchy. DS-0 is a voice grade channel designed to support voice digitized using pulse code modulation (PCM), or to support other data at a rate of up to 64 kbps. A DS-0 channel comprises eight-bit binary values transmitted at a rate of 8,000 per second (8 bits × 8,000 per second = 64,000 bps, or 64 kbps). In a typical voice application, 24 PCM-encoded voice conversations are interleaved to form a T1 frame. See also digital signal hierarchy, DS-1, DS-1C, DS-2, DS-3, DS-4, PCM, T1, and voice grade. 74570c04.qxd 9/11/07 12:19 PM Page 146 |
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