2—1. General a. The TD-204/U or TD-754/G, TD-206/G, and TD-352/U are pulse-code modulation components used as part of multichannel communication systems. These systems use radio or cable, or combinations of both as transmission mediums. The pcm components provide 12 or 24 audio channels in a single transmission channel. 6. In a 12-channel system, separate telephone signals are converted to time-division-multiplex, pulse-code-modulation (tdm-pcm) pulse trains. These pulse trains are reshaped and retimed at repeater points in the system, and reconverted to telephone signals at a distant terminal. In a 24channel system, the 24 telephone channels are converted into two tdm-pcm pulse trains. For radio transmission or cable transmission, the two pulse trains are interleaved and transmitted over a single radio channel or single cable. c.
DesignationTM 11-5895
EditionJan 1990
StatusSuperseded
Pages94
FunctionComms Signal
CollectionRecent Archive
Public domain (U.S. Government work)