A channel bank unit for interfacing baseband user signals with a PCM carrier communications channel. The channel bank unit includes a circuit allowing verification of the transmission interity between the channel bank unit and external equipment having two-way communication with the channel bank unit. The circuit includes a first portion for evaluating the reception integrity of signals received from the external equipment and a second portion for imposing a parity sense on the signals transmitted to the external equipment that is related to the evaluation results of the first portion.
申请公布号
US4849977(A)
申请公布日期
1989.07.18
申请号
US19870086013
申请日期
1987.08.17
申请人
AMERICAN TELEPHONE AND TELEGRAPH COMPANY AT&T BELL LABORATORIES
发明人
BAUN, JR., PHILIP J.;CARRIERE, JOSEPH F.;ENG, STEPHEN K.;LANDRY, JOSEPH E.;LEE, JONGHEE;NOLAN, THOMAS M.;RHODES, DAVID C.