Multiplex communications – Communication techniques for information carried in plural... – Combining or distributing information via time channels
Patent
1996-09-11
1999-02-09
Pham, Chi H.
Multiplex communications
Communication techniques for information carried in plural...
Combining or distributing information via time channels
370228, H04L 122
Patent
active
058704035
ABSTRACT:
An apparatus for establishing synchronization between transmission signals transmitted from a signal source of a sending end to a receiving end via regular and alternative lines in a network using a transmission system such as the SDH and SONET. In the sending end, the present invention inserts a FP signal in the multiplexed information of the signal output from the signal source. On both regular- and alternative-line sides of the receiving end, it detects the pointer in the transmission signals received from the respective lines, separates the multiplexed information from the transmission signal based on the pointer, stores the separated multiplexed information in a memory unit which is capable of varying its storage capacity as specified and reading out the information when a time corresponding to the storage capacity has elapsed after the information is stored, outputs a detection signal when the FP signal is detected in the multiplexed information output from the memory unit, and specifies the storage capacity of at least one of the memory units so that the detection signals occur at the same time.
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patent: 5091907 (1992-02-01), Wettengel
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patent: 5343464 (1994-08-01), Itino et al.
patent: 5361263 (1994-11-01), Urbansky
patent: 5677931 (1997-10-01), Okuyama et al.
Duong Frank
Fujitsu Limited
Pham Chi H.
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