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TG100 answer with extension not found on outbound call

NTS

July 20, 2019 05:47

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Hi all

We got a new TG100 Gateway, to perform outbound cell calls from monitoring System.

The Internal Pbx send a SIP "INVITE sip:0781234567@217.12.34.56;user=phone SIP/2.0" to the TG100 Gateway, but the Gateway answers with "SIP/2.0 404 Not Found".

In the gateway debug logs i got the following Error Message:

"Call from 'voice' to extension '0781234567' rejected because extension not found."

The SIP Trunk is set up and working, the IP-to-Mobile rule is setup as well as "simple" rule (SIP inbound, GSM Outbound)

I can send a SMS properly and also a inbound call to a configured hotline number.

Why say TG100 "extension not found"? 

Thank you very much for your help!!

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4 comments

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  Larry Neblett July 22, 2019 10:50

  Ok, the first thing, why is the gateway using a public IP? Is it not on the same LAN as the PBX?

  What kind of trunk is set - register or peer?

  When you send an SMS, are you sending to the same number as the 404 error?

  Are you certain that the number is in the format needed by the provider? The 404 may be the message that the TG received from the provider and the TG is merely relaying the issue back. You will get the same error when using a SIP trunk provider and dialing a non existent number.

   

  It is hard to say as there is no info related to how the TG or the PBX is programmed.

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  NTS July 22, 2019 13:53

  Hy Larry

  Thank you for your reply! In fact the Pbx and the Gateway are in the same broadcast domain aka. same network. And yes, theese are pubilc IPs behind a Firewall - NAT is not that cool...

  The SIP Trunk is set up as a trunk. What do you mean with register or peer?

  Yes, when i send a sms it is exactly the same number. 

  The Pbx does special Numbers forward outbound calls to TG100, if the Gatweway does not respond, or answer with "404 Not Found" it takes a second path via SIP Provider. The Call via SIP Provider does work well.

  Its hard for me, to get the information, how the Provider need to be called... And Yes, i get the same "404 Not Found" if the number does not exist.

  But the hint, to search Problem at provider side, sounds good!!

  Thank you very much!

  BR Adrian

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  Larry Neblett July 22, 2019 13:59

  So...why is the invite being sent to the public ip if the GSM is on the local lan? Did you not define the lan to the pbx?

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  NTS July 22, 2019 14:05

  Hi. The Pbx and the GSM are in the same network, with public IPs. No private IPs are configured. Only the Pbx has a internal NIC for SIP Desktop Phones.

  The GSM has last octet .32 and the Pbx .30 in a /26 Network - so no router is involved.