In digital communications systems, a channel that has a useful capacity of only 56 kb/s (kilobits per second), instead of 64 kb/s. ( 188 ) Note: The restricted channel, currently common in North America, was originally developed to satisfy a ones-density limitation in T1 circuits.
RESTRICTED CHANNEL
Meaning of RESTRICTED CHANNEL in English
Telecommunication standard terms English vocab. Английский словарь стандартных телекоммуникационных терминов. 2012