Some calls have double ring tone on outbound calls

[Enoch]

Using 3CX with Patton SmartNode 4114 and Patton SmartNode 4970 VOIP Gateways. Phone calls being made through a Cisco 7961 IP Phone.

When a local outbound call are made through 4114, the outbound ring tone is normal (single ring). But when a local outbound call is made to the same number through 4970, I would get some weird double ring tone. Now to really throw this into a loop, when a long distance call is made (1 xxx-xxx-xxxx), I get the normal single ring.

Anyone have any ideas on how to correct this?

 

[leejor]

Some devices will provide their own ring-back tone (advanced audio) rather than silence until verification (SIP message) that the call is in progress, or the audio path is cut through. This may, or may not, be a device option that can be changed.

 

[Enoch]

So are you saying that this is an option within the SmartNode 4970 VOIP Gateways?

 

[leejor]

It may very well be an option within the set, most, if not all VoIP sets are capable of generating system tones as required.. If possible, try some calls using a different phone, even using the 3CX softphone may yield different results. There is/was an option for advanced audio that did provide a UK style ringback tone ahead of actual ringback, if the advanced audio option was enabled. You may want to turn that off for testing.