Patent ID: 8208414

Claim:
A communication system comprising: a first unit; and a second unit communicatively coupled to the first unit; wherein the first unit is operable to receive a first original radio frequency signal from an upstream device via a first interface and the second unit is operable to receive a second original radio frequency signal from a downstream device via a second interface; wherein the second unit is operable to output a first reproduced radio frequency signal to the downstream device via the second interface, the content of the first reproduced radio frequency signal being derived from the first original radio frequency signal; wherein the first unit is operable to output a second reproduced radio frequency signal to the upstream device via one of the first interface and a third interface, the content of the second reproduced radio frequency signal being derived from the second original radio frequency signal; wherein the first interface is operable as a simplex interface when the second reproduced radio frequency signal is output via the third interface and as a duplex interface when the second reproduced radio frequency signal is output via the first interface.