| 释义 |
SYNTRAN (SYNchronous TRANsmission) A standard developed at Bellcore for synchronous add/drop multiplexing (ADM) at rates up to 45 Mbps (T3) on the basis of a single master clocking source, which allowed the elimination of stuff bits and, thereby, reduced overhead. SYNTRAN also allowed DS-0s and DS-1s to be added to, i.e., multiplexed directly into, and dropped from, i.e., demultiplexed directly from, a DS-3 frame, thereby eliminating the intermediate DS-2 level. SYNTRAN formed the basis for the Synchronous Optical Network (SONET) standard. See also ADM, Bellcore, DS-0, DS-1, DS-2, multiplexer, overhead, SONET, stuff bit, synchronous, and T3. 74570c19.qxd 9/12/07 12:41 AM Page 470 |