Patent ID: 7200196

Claim:
A communication apparatus for communicating with a further communication apparatus via a communication medium, comprising: a communication port for coupling to the communication medium; a conversion apparatus for converting between respective analog and digital formats of a communication signal, including an analog port where said communication signal is presented in analog format, and a digital port where said communication signal is presented in digital format, said analog port coupled to the communication port with an input of an analog-to-digital converter and output of a digital-to-analog converter; and said conversion apparatus including a compensator coupled to said digital port for modifying sample values in said digital format communication signal to compensate for a frequency difference between a time base used by said conversion apparatus and a further time base used by the further communication apparatus, said compensator including a receive compensator having an input coupled to said output of said analog-to-digital converter, and a transmit compensator having an output coupled to said input of said digital-to-analog converter, said transmit compensator having an input, and said digital port including said input of said transmit compensator and said output of said analog-to-digital converter.