Multiplex communications – Wide area network – Packet switching
Patent
1991-07-03
1993-11-23
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
370 581, H04J 312
Patent
active
052650960
ABSTRACT:
Methods and apparatus for quickly generating and transmitting SONET AIS signals are disclosed. Upon detecting a failure condition at the receiving side of a SONET terminating equipment, the SONET terminating equipment inserts an internal alarm control signal (e.g. a byte of all ones) into at least one predetermined transport overhead timeslot (e.g. E1). On the transmitting side, the transmitting SONET terminating equipment monitors the predetermined timeslot(s) and detects whether an indication of the internal alarm control signal has been received. If so, the transmitting SONET terminating equipment inserts an appropriate alarm in predetermined overhead and data timeslots of the outgoing SONET frame signal as specified by proposed AIS standards.
REFERENCES:
patent: 4507782 (1985-03-01), Kunimasa et al.
patent: 4961180 (1990-10-01), Schwarz et al.
patent: 4967405 (1990-10-01), Upp et al.
patent: 4996683 (1991-02-01), Yamashita et al.
patent: 5018132 (1991-05-01), Williams et al.
patent: 5134614 (1992-07-01), Baydar et al.
Section 6 of "Sonet Transport Systems: Common Generic Criteria" pp. 6-1 through 6-43, Issue 4, Feb. 1989, Bellcore Technical Advisory TA-TSY-000253.
Gordon David P.
Hom Shick
Olms Douglas W.
TranSwitch Corporation
LandOfFree
Sonet alarm indication signal transmission method and 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 Sonet alarm indication signal transmission method and apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Sonet alarm indication signal transmission method and apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1855448