Getting started 15About the keypad microphoneYour radio may have a keypad microphone installed. Thekeypad microphone has a PTT key as well as twelve alphanu-meric keys, two scroll keys, and shift and clear keys.The PTT key, and the scroll, clear and shift keys work in thesame way as those on the control head (see “About the radiocontrols” on page 13).The alphanumeric keys can be used in trunked mode todirectly dial any number you can dial using the shift key andscroll keys. In addition, the alphanumeric keys can be used todial special MPT functions as summarized in the followingtable. The availability of these functions is dependant on theway your radio is programmed and the way your networkoperates.Note: In the following examples, the final # may be replacedby a short press of the PTT key.PTT key(press-to-talk)microphoneclear keyscroll keysalphanumeric keysshift keyDiallingcodeCall to# Accept an incoming call*# Clear call or displayed item, or decline an incoming call*0##0#Request base dispatcher to call you backCancel request