Hold/mute with FreeSwitch and Asterisk

Now I know how the "hold" and "mute" works on FreeSwitch and Asterisk (in a lure of SIP). X-Lite, Eyabeam and SjPhone were used in test, and with all of them pressing on "hold" softphone button led to: participator hear music-on-hold, hold-initiator hear silence. So, both FreeSwitch and Asterisk are so wise that play music-on-hold for person being held and silence for us. "Mute" is similar.

(at least) For Asterisk it is possible to turn of sound in music-on-hold (if you wish to hear silence being held and being free. To do this add line

musiconhold=none

to the specific peer section or to the 'global' if you want to apply this feature for everyone.


Ad notam:

1. "hold" itself is simply re-INVITE with SDP attributes

IN:0.0.0.0
a:sendonly



2. Mute. Well, with Asterisk you can mute SIP channel using re-INVITE with "a=receiveonly" in media description. Freeswitch (at least in version 1.0.4 and below) doesn't support this.