Author Topic: SIP ..phone ring but no audio  (Read 1537 times)

Offline small_eyes

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SIP ..phone ring but no audio
« on: June 03, 2016, 03:39:41 AM »
Hi,

I implemented sip did route to our PBX IP..when I dial the DID number..the phone will ring ..but no audio..vendor ask me enable g.729 ON mitel..where I can enable it or in sip peer profile?


Offline x-man

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Re: SIP ..phone ring but no audio
« Reply #1 on: June 03, 2016, 12:17:05 PM »
G.729 is default ion Mitel 3300 type systems.

No audio is usually a ports fault. Or SIP-ALG running on the router. (needs to be turned off. If its another Mitel system I don't know.

Offline ralph

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Re: SIP ..phone ring but no audio
« Reply #2 on: June 03, 2016, 01:08:54 PM »
The usual mistake I see is that a firewall admin will allow the SIP device to talk to the controller but not the end device.
That's why it will ring - it can get the signaling from the controller - but can't talk to any other phone.
The SIP device must be able to talk to any subnet where there are going to be phones talking to it.

Ralph

Offline johnp

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Re: SIP ..phone ring but no audio
« Reply #3 on: June 03, 2016, 07:13:07 PM »
I would verify if using G.729 you have compression licenses for the items that may need it. Think MOH does and any analog or other tdm device will


 

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