Patent ID: 8103298
Filing Date: 2012-01-24
Classification: H04M,H04W

Abstract:
1. A push-to-talk (PTT) device comprising: a channel selector that selects a first frequency on which to receive and transmit in accordance with a state of a PTT button; the PTT button configured to activates transmission of a first PTT signal from the device on the first frequency when pressed and to activate reception of a second PTT signal on the first frequency when not pressed; a multiple PTT key, different from the PTT button, that when pressed activates a multiple PTT function that selects a new transmission frequency on which to transmit, different from the first transmit frequency, while the reception frequency of the device remains at the first frequency; and a keypad containing a plurality of keys that, when the multiple PTT function is activated by the multiple PTT key, determine a new transmission frequency of the device on which to transmit, different from the first transmit frequency, dependent on a particular selection of one of more of the plurality of keys.