Excavating
Patent
1995-02-27
1998-01-27
Baker, Stephen M.
Excavating
370248, H04J 314
Patent
active
057128626
ABSTRACT:
It is an object to efficiently detect and analyze an error occurring on a channel of a digital data transmission multiplexing system with a small circuit scale and a low power consumption. A TU aligner for setting an AU pointer value to zero such that a J1 byte floating in an STM-1 signal is located next to the right one of three H3 bytes in an SOH and changing pointer values (V1 and V2) in each TU channel signal is arranged, and an error which is determined by analyzing each channel signal in the STM-1 signal processed by the aligner and a V5 byte as the POH byte in the signal is detected without demultiplexing the multiplexed STM-1 signal in units of TU channels and which is reported by means of an alarm.
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Fujita Yoshitaka
Ono Yasushi
Baker Stephen M.
NEC Corporation
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