High speed communications system for analog subscriber connectio

Pulse or digital communications – Pulse code modulation

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Details

375285, 370523, H04B 1404

Patent

active

058598723

ABSTRACT:
A method of detecting the presence of robbed-bit signaling within the digital portion of a telephone network. A communication system includes an encoder and a decoder. The encoder has a digital connection to the digital portion of the telephone network. The digital portion of the telephone network is connected by an analog loop to the decoder. The method includes sending a predetermined pattern of PCM codewords from the encoder, through the telephone network, to the decoder. An error measurement is taken at the decoder. The presence of robbed-bit signaling is determined based upon the error measurement.

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patent: 5710790 (1998-01-01), Herzberg et al.
patent: 5729229 (1998-03-01), Betts et al.
patent: 5761247 (1998-06-01), Betts et al.

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