[asterisk-users] Music on Hold doesn't play back for external callers

[Martin]

Do you have zaptel timing working ? (or dahdi) ?
If no timing is available then if there's no incoming audio frames coming
from the external SIP channel then no outgoing audio will be produced (even
if you have
MOH application working)

The trigger to fire the outgoing audio frame comes from the incoming audio
frame. So check if the Answer + Echo application work.

Also if you have VAD which means your SIP device doesn't send audio frames
when there's silence detected =>
you'd also have the same problem = not see audio going to your phone.

Martin

On Fri, Mar 20, 2009 at 6:07 PM, Greg Hinson <greg_hinson at msn.com> wrote:

>  Hey all;
>
> I am experiencing an issue with music on Hold. I am running asterisk
> version 1.4.22, and have a default script set up in two places for MoH
> playback. For internal devices to my network that are SIP peering with
> asterisk, they simply dial 123 and hear the MoH music immediately. I'm using
> the default setup, where it just plays the wave files in the
> /var/lib/asterisk/moh directory. I also have in my General settings in
> sip.conf to use the default musicclass.
>
> *On-net context script for MoH in extensions.conf:*
> exten => 123,1,Answer()
> exten => 123,2,MusicOnHold(default)
>
> *Calls from the PSTN are matching this Moh setup in extensions.conf:*
> exten => _1720XXXXXXX,1,Answer()
> exten => _1720XXXXXXX,2,MusicOnHold(default)
>
> *Output captured when internal devices attempt to dial number associated
> with MoH:(MoH is heard)*
> -- Executing [123 at Home:1] Answer("SIP/10.1.1.254-b77089b0", "") in new
> stack
> -- Executing [123 at Home:2] MusicOnHold("SIP/10.1.1.254-b77089b0",
> "default") in new stack
> -- Started music on hold, class 'default', on SIP/10.1.1.254-b77089b0
>
> *Output captured when external callers dial into asterisk from the PSTN,
> they get dead air instead of MoH:*
>  -- Executing [1720XXXXXXX at Home:1] Answer("SIP/1720XXXXXXX-b7704a38", "")
> in new stack
>  -- Executing [1720XXXXXXX at Home:2] MusicOnHold("SIP/1720XXXXXXX-b7704a38",
> "default") in new stack
>  -- Started music on hold, class 'default', on SIP/1720XXXXXXX-b7704a38
>
> You see rule 1(answer) and rule 2(moh) being hit on both call attempts, but
> the external caller continues to get dead air. has anyone seen this one
> before? The internal devices requesting MoH are using the SCCP protocol load
> image(registered elsewhere) and then they are SIP trunked to
> Asterisk. Asterisk uses a second separate SIP trunk to peer with the PSTN.
>
> -Greg
>
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