Patent ID: 7162016

Claim:
An adapter apparatus for coupling a headset and an audio device to a telephone headset amplifier, the apparatus comprising: a. a first interface for sending audio signals to and receiving audio signals from the telephone headset amplifier; b. a second interface for sending audio signals to and receiving audio signals from the headset; c. a third interface for sending audio signals to and receiving audio signals from the audio device; and d. a switching circuit coupled to the first interface, the second interface, and the third interface, wherein the switching circuit provides a communications link between at least two of the first interface, the second interface, and the third interface as a function of a selected mode, wherein a first communications link is provided between the second interface and the third interface when a first mode is selected, and a third communications link is provided between the first interface, the second interface, and the third interface when a third mode is selected such that the audio device provides audio signals to the headset and to the telephone headset amplifier over the third communications link.