Synchronization method and apparatus in redundant time-division-

Details Synchronization method and apparatus in redundant time-division- Synchronization method and apparatus in redundant time-division-

1983-11-18

1986-03-04

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

375108, H04J 306, H04L 300

Patent

active

045743770

ABSTRACT:
A synchronization method and apparatus in redundant time-division-multiple-access communication equipment, wherein the synchronization between an active circuit and a standby circuit is carried out using a frequency divided signal from the active transmission frame timing signal instead of using the transmission frame timing signal. At timings other than the output timing of the frequency divided signal, the standby transmission frame counter runs independently. Thus, failure of the active circuit has less effect on the standby circuit and switching between the active circuit and the standby circuit can be carried out smoothly.

REFERENCES:
patent: 3795872 (1974-03-01), Napolitano et al.
patent: 3803568 (1974-04-01), Higashide
patent: 3974333 (1976-08-01), May, Jr. et al.
patent: 4019143 (1977-04-01), Fallon et al.
patent: 4144448 (1979-03-01), Pisciotta et al.
patent: 4147894 (1979-04-01), Watanabe et al.
patent: 4282493 (1981-08-01), Moreau
Patent Abstracts of Japan, vol. 6, No. 218, Nov. 1982.

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