[App_rpt] DTMF paging

Hi the list, I want to check if any of you have tempted to send DTMF pages through Asterisk to a radio equiped of a DTMF decoder. The idea is to add a 3 DTMF digits page to close all radio loudspeakers and 3 more DTMF digits to link only one handy in the radio fleet, just after to have bridged a telephone call to a repeater . The "Dial" Asterisk command permits that for other channels than chan_rpt but I don't see how to do that to the radio channel with the RPT command. Any idea ? Best 73's, F6HQZ, Francois BERGERET.