Multiplex communications – Wide area network – Packet switching
Patent
1981-06-29
1983-07-19
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
370111, 370 13, H04J 312, H04J 314
Patent
active
043947590
ABSTRACT:
A transmitting section of a PCM station in a telecommunication system, embodied in an integrated-circuit chip, comprises a channel-forming circuit receiving a stream of data bits to be organized into a succession of outgoing frames each consisting of a series of channels containing respective 8-bit words or bytes. A multiplexer in the channel former replaces part of a received byte assigned to the No. 0 channel of each frame, including its second and third bits, with certain bits to be included in two alignment words A and B respectively transmitted to a remote terminal at the beginning of alternate frames. The third bit of word B is high when a malfunction is detected or when the replaced second and third bits of the corresponding byte have certain configurations detected by a decoder, calling either for the closure of a loop between the local transmitting and receiving sections or for the monitoring of the PCM line extending to the remote terminal. The latter operation is controlled by a remote-supervision circuit which, in response to either of two such bit configurations, causes the bits of one or more frames to be sent out in either of two representations selectively established by an associated coder.
REFERENCES:
patent: 4064369 (1977-12-01), Battocletti
patent: 4081611 (1978-03-01), Bovo et al.
patent: 4268722 (1981-05-01), Little et al.
Dubno Herbert
Italtel Societa Italiana Telecomunicazioni S.p.A.
Olms Douglas W.
Ross Karl F.
LandOfFree
Transmitting section of PCM station does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Transmitting section of PCM station, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Transmitting section of PCM station will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-755245