External CFWD over SIP Trunks

[ECartman]

Hi Guys,

Have a bit of a strange one here. Have a BCM50 with SIP trunks to ITSP. Inbound and outbound calls work flawlessly.

However when an extension call forwards to an external number (mobile) there is no audio and the call disconnects after 25 seconds.

Anyone experience this ?

 

[ECartman]

Any thoughts here guys, I'm getting a lot of heat on this one :-(

 

[ironhorse17]

How many lines do you have?

Basicaly a call forward out of the system is a conference call done by the system, can you try different combination of lines by manually doing a conference call, does the same thing happen?

 

[ECartman]

4 SIP trunks in total and conference calls work fine.

 

[morenot]

load last patches

Saludos...

JLMT//

 

[ECartman]

Sorry guys, should have mentioned it's R6 with all GA patches.

 

[ECartman]

For anyone else having this issue.

Enabling RTP keep-alives has resolved for me