Multiplex communications – Wide area network – Packet switching
Patent
1994-10-24
1996-11-12
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
370 161, H04L 122
Patent
active
055747191
ABSTRACT:
A wait-to-restore section corresponding to a first channel has a selector for switching an output side under the control of a mode setting section, and a timer which is reset at the time of mode change. The selector of the wait-to-restore section corresponding to the first channel supplies its output only to a path switch corresponding to the first channel in STS-1 mode and commonly supplies the output to path switches corresponding to the first to third channels. The mode setting section supplies selector change signals to respective alarm detecting sections corresponding to the first to third channels, and supplies a selector change signal and a timer reset signal to the selector of the wait-to-restore section corresponding to the first channel. At the time of mode change from the STS-1 mode to the STS-3c mode or vice versa, the timer of the wait-to-restore section corresponding to the first channel is reset. In STS-3c mode, timers of the wait-to-restore sections corresponding to the second and third channels exclusive for the STS-1 mode are reset.
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Fujitsu Limited
Olms Douglas W.
Patel Ajit
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