Data rate conversion and supervisory bit insertion in a data system
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United States of America Patent
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Aug 27, 1985
Grant Date -
N/A
app pub date -
Jul 26, 1983
filing date -
Jul 26, 1983
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A data rate converter for use in telecommunications inserts supervisory bits into a data stream to increase the data rate, in one application, from 56 kbps to a standard 64 kbps. A standard 64 kbps PCM telephone channel uses 8-bit words for transmission, whereas 56 kbps occupies only 7 bits of an 8 bit word in such a telephone channel. Supervisory bits are inserted at the exact time when the data channel clock signal and the transmission line clock signal are in phase alignment.
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