Transmission unit and two-way signal conversion method

Details Transmission unit and two-way signal conversion method Transmission unit and two-way signal conversion method

2005-03-22

2005-03-22

Chin, Stephen (Department: 2634)

Pulse or digital communications

Transceivers

Loopback mode

C370S395510

Reexamination Certificate

active

06870877

ABSTRACT:
A transmission unit which transports digital signals between different network systems, effectively converting the signals to resolve their differences in the specifications. A first signal interface transmits and receives first network signals. A second signal interface transmits and receives second network signals. A downward converter produces lower-level signals by converting received first and second network signals to a lower hierarchical level at which the first and second network systems are compatible with each other in terms of logical signal structure. An upward converter produces a higher-level signal by converting each given lower-level signal to an upper hierarchical level which complies with the first or second network system. A loopback unit provides loopback paths to route the lower-level signals from the downward converter to the upward converter, so that the first and second network signal will be converted in both directions.

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