Patent ID: 7590222

Claim:
An apparatus for generating signals to be used to determine the one way delay for calls connected between handsets through a network comprising: a first electric to acoustic (E/A) converter coupled to a transmitter of a call originating handset; a second E/A converter coupled to a transmitter of a call terminating handset; an acoustic to electric (A/E) converter coupled to a receiver of the call terminating handset; and a play/record test controller coupled to the first and second E/A converters for playing a test signal to the call originating handset and the call terminating handset, the play/record test controller coupled to the A/E converter for independently recording a sidetone locally generated in the call terminating handset and a signal acoustically generated in the call terminating handset based on the test signal played to the call originating handset and transmitted through the network.