Bridge terminal output unit

Details Bridge terminal output unit Bridge terminal output unit

2006-08-29

2006-08-29

Li, Shi K. (Department: 2613)

Optical communications

Fault recovery

Wdm

Reexamination Certificate

active

07099579

ABSTRACT:
The commercial demand for higher aggregate data rates has led to DWDM (Dense Wavelength Division Multiplexed) transmissions. Network elements need the capacity in these systems to reconfigure in case of a bit stream failure. The instant invention can bridge communications between other network elements including optical and electrical signal network elements, when a loss of signal detection circuit to substitute a second bit stream for a time delayed original bit stream and a circuit element connected to the loss of signal detection circuit to permit the network elements to reconfigure without activating automatic protect switch mechanisms of a bridged network. The instant invention also teaches a method for ensuring communication of network elements of a bridged network including optical and electrical signal network elements, by detecting a loss of signal in a transmitted bit stream; substituting a second bit stream for a time delayed original bit stream; and allowing network elements to crossconnect to reconfigure optical channels in a manner that will not interfere with network functions.

REFERENCES:
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patent: 2002/0021464 (2002-02-01), Way
patent: 2002/0131115 (2002-09-01), Kasahara
patent: 2003/0025956 (2003-02-01), Li et al.
D. Cavendish, “Evolution of Optical Transport Technologies: From SONET/SDH to WDM”, IEEE Communications Magazine, Jun. 2000.

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