Server Edition 10.1 using SIP ATA and SIP trunks

[hall5942]

I am having trouble routing inbound calls to a SIP ATA for a fax line. Running on Server Edition version 10.1 with 30 SIP trunks. The ATA is registered and I can make outbound calls and call it internally and it rings fine. When I assign an external number to it I get a busy signal. Monitor is showing

I have contacted the carrier and they have confirmed they are using G.711u for faxing and I have that setup on both the ATA and the extension. I have tried None. T.38 and T.38 fallback with the same results. If I point that DID to a physical phone it will ring in fine. Just when I have it pointed to the ATA. The ATA is an Audio Codes MP-112FXS. Any idea what could be going on?

 

[rdoubrava]

Do you get the MP-112 to register?
the username field in SIP devices is the extn number

 

[hall5942]

Yes it is registered. I can fax out and also call it from an extension number.

 

[joe2938]

Have you got the correct incoming line id for the sip trunk programmed on the incoming call route

 

[hall5942]

Yes. If I point that incoming line to a 9608 it works fine.

 

[joe2938]

Thanks that was going to be my next question.

 

[joe2938]

We have run into this issue in the past and have found that it was the sip provider that did not support faxing over the sip trunks, so I would reach out to your sip provider and go from there.

 

[joe2938]

I know you said you did reach out to them but I would give tham a call sample with time and date the fax call was made and maybe they might find somrthing

 

[hall5942]

We also have a 8 port fax finder that is SIP based and it is working correctly on inbound and outbound.

 

[joe2938]

Then look at the config notes for the sip ata, who is the manufacture?

 

[hall5942]

Audio Codes is the manufacture. I am opening a ticket with them.

Thank you!