Patent ID: 7224992

Claim:
An electrical signal interface arrangement, comprising: an external push-to-talk user input device external to a wireless communications device, the external push-to-talk user input device for accepting user input from a user and for providing electrical user input signals representing whether the user has activated the external push-to-talk user input device for controlling a push-to-talk function of the wireless communications device; an external microphone external to the wireless communications device, the external microphone for converting audio from a user to corresponding electrical audio signals and for coupling the electrical audio signals with the wireless communications device; and a connector interface comprising an electrical contact, the electrical contact electrically coupled with the external push-to-talk user input device and with the external microphone, the electrical contact for coupling the electrical audio signals from the external microphone to the connector interface and for contemporaneously coupling the electrical user input signals from the external push-to-talk user input device to the connector interface, wherein the electrical contact is further electrically coupled with circuits in the wireless communication device, including: a PTT detector circuit, and an audio input circuit for receiving electrical audio signals from the electrical contact.