PCM TRANSMISSION.

被引：0
|
作者：
Widl, W.
机构：
来源：
Fortschritt-Berichte der VDI-Zeitschriften, Reihe 4: Bauingenieurwesen | 1972年 / 49卷 / 01期
关键词：
MULTIPLEXING EQUIPMENT - PULSE CODE MODULATION;
D O I：
暂无
中图分类号：
TN91 [通信];
学科分类号：
0810 ; 081001 ;
摘要：
PCM techniques are a combination of pulse code modulation and time division multiplex transmission and, like frequency-division multiplex (FDM) carrier techniques, permit utilization of a single transmission circuit for more than one telephone channel. The development of a pulse code modulation system for the transmission of 30 telephone channels over a four-wire circuit is reported. The PCM system, which meets CCITT standards, comprises PCM Multiplexing Equipment ZAK 30/32 and PCM Line Equipment ZAD 2. A comparison is made between PCM and FDM carrier systems. Standardization and future prospects are discussed.
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页码：9 / 13
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