[asterisk-users] Muliticast not connecting

[Joshua C. Colp]

On Thu, Oct 13, 2022 at 2:16 PM Jerry Geis <jerry.geis at gmail.com> wrote:

> I have a simple dialplan with asterisk 18.14.0
>
> exten => 141,1,Answer
> exten => 141,n,Noop(MC)
> exten => 141,n,Playback(beep)
> exten => 141,n,Dial(MulticastRTP/basic/239.168.4.90:30410//t(15))
> exten => 141,n,Hangup
>
> Most times this works just fine ... Once in a while the person hears the
> beep - but nothing connects on the multicast.
>
> What might this be? How can I tell what is happening and why it does not
> connect?
>
> is it valid to put :
> exten => 141,n,Dial(MulticastRTP/basic/239.168.4.90:30410//t(15))
> exten => 141,n,Dial(MulticastRTP/basic/239.168.4.90:30410//t(15))
>
> So if the first one doesnt connect perhaps the second one will ???
> Thanks
>

Multicast doesn't connect. There is no session. RTP is thrown out onto the
network using multicast, and then devices pick it up. Asterisk has no idea
what (if anything) is receiving it. You'd want to do a packet capture to
see what is being multicast.

-- 
Joshua C. Colp
Asterisk Project Lead
Sangoma Technologies
Check us out at www.sangoma.com and www.asterisk.org
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