in-band
<communications> (bit-robbing) The exchange of call control information
on the same channel as the telephone call or data transmission. Since one bit in
a frame is periodically used for signalling instead of data, this is often
referred to as bit robbing.
This is the reason why a D1 channel in the T-carrier system can only carry 56
Kbps of usable data instead of the 64 Kbps carried by the D0 channel in the
E-carrier system.
(2000-03-10)
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