extension => 8365.1, playback (sip-silence)

I have 2 campaigns ratio dial. A campaign is working with SIP. The other campaign is working with IAX. Is it possible the "extension => 8365.1, playback (sip-silence)" entry for both protocols to use?
VICIDIAL astGUIclient discussion forum
http://forum.eflo.net/VICIDIALforum/
http://forum.eflo.net/VICIDIALforum/viewtopic.php?f=4&t=6415