Multiplex communications – Wide area network – Packet switching
Patent
1994-12-14
1996-05-07
Hsu, Alpus H.
Multiplex communications
Wide area network
Packet switching
3701053, 370108, 34082501, 34082514, 375371, 39518202, H04J 314, H04L 100, G06F 1100
Patent
active
055153623
ABSTRACT:
A digital signal transmission apparatus having a synchronous digital hierarchy interface having duplex channels is disclosed which prevents, when a code error occurs in a working channel, transmission of the signal including the code error to an apparatus connected at the next stage. The digital signal processing apparatus includes a pair of code error detection sections provided for the working channel and a protection channel each for detecting presence or absence of a code error of a virtual container signal in units of a frame using a result of calculation of a bit interleaved parity, and a frame memory provided for each of the working channel and the protection channel for delaying a signal, for which detection by the code error detection section has been performed, by one frame and outputting the delayed signal to a phase synchronizing section. A selector is switched in units of a frame in response to results of code error detection of a frame by the code error detection sections to extract one of a pair of outputs of the phase synchronization section.
REFERENCES:
patent: 4451916 (1984-05-01), Casper et al.
patent: 5146477 (1992-09-01), Cantoni et al.
patent: 5299234 (1994-03-01), Nakagawa et al.
patent: 5325354 (1994-06-01), Hadano
patent: 5459715 (1995-10-01), Furuta et al.
CCITT Recommendation G.783; CM XV-R 41-E (75 pages).
Hsu Alpus H.
NEC Corporation
LandOfFree
Digital signal transmission apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Digital signal transmission apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Digital signal transmission apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1232931