Hosted 3CX wont allow outbound calls on Gamma Sip Trunk

[Paul Brennan]

Hi,

I have a 3CX instance that has been hosted by 3CX with Gamma and I am not able to make outbound calls. All other features including internal and inbound calls are connecting normally.

From the logs i get a 404 result as I believe that the wrong details are being passed. I have not been able to find what the correct settings would be for a Gamma Trunk despite extensive searching and a lot of trial and error.
Can anyone confirm what the Outbound Parameters would be?

Many thanks,

 

[Paul Brennan]

The log shows:

has failed. 35.25.**.** replied: 404 User unknown.; from IP:35.25.**.**:5060

 

[mixig]

Check number format for dialed number, maybe your provider is expecting dialed number in different format

 

[eddv123]

Very little should need to be changed as it is a templated/supported trunking provider.

I have used Gamma before and at one point had to change the "Put Public IP in SIP VIA Header" but this was due to a network configuration problem.

Bit of a basic question but I do not see anything mentioned in your initial email - do you have an Outbound rule setup for this trunk - and ensure that your first route is not set to "BLOCK CALLS".

 

[Paul Brennan]

Hi,
The number format comes through with the format ie. 02071112233.

Very little should need to be changed as it is a templated/supported trunking provider.

I have used Gamma before and at one point had to change the "Put Public IP in SIP VIA Header" but this was due to a network configuration problem.

Bit of a basic question but I do not see anything mentioned in your initial email - do you have an Outbound rule setup for this trunk - and ensure that your first route is not set to "BLOCK CALLS".

Yes i have an outbound Rule that I have copied from a different 3CX build on a different Sip Trunk which is able to make outbound calls with no problem.


Thanks,

 

[YiannisH_3CX]

Hello @Paul Brennan

Please note that Gamma is a supported provider and the template included in the management console is correctly configured with all the necessary settings for Gamma. With that in mind i would recommend deleting the trunk and re-adding it to make sure that all settings the the default ones. If you still cannot perform outbound calls then navigate to trunk settings / Options and make sure that the option "Put Public IP in SIP VIA Header" is enabled and the correct public IP is populated in the field.

 

[Paul Brennan]

Hello @Paul Brennan

Please note that Gamma is a supported provider and the template included in the management console is correctly configured with all the necessary settings for Gamma. With that in mind i would recommend deleting the trunk and re-adding it to make sure that all settings the the default ones. If you still cannot perform outbound calls then navigate to trunk settings / Options and make sure that the option "Put Public IP in SIP VIA Header" is enabled and the correct public IP is populated in the field.

I have rebuilt the sip Trunk twice and left the settings as per default and i can confirm the correct external IP address is set for the SIP Header. I am still having the same issue.
I have spoken to Gamma and they have advise that they are not seeing the call on their logs so it appears that the call is not reaching them.

Thanks.

 

[YiannisH_3CX]

Are you seeing any errors in the activity log of the PBX when you try to make a call? You may need to set the logging level to verbose and restart services in order to capture more details about the issue. You could also run a wireshark and check if the call is leaving the server.