Proxy Auth required in a multi-trunk scenario

[Davide Cocchi]

Hi all,

I run into a problem implementing a SIP star connected scenario, in which the sipxcom is (obviously) the center of the star.

I have multiple SIP Trunks that have to work together, using sipxcom (10.70.1.130). I setup dialplans with Permissions => None, as:

- with 1000 prefix I send a call to trunk A (custom IVR => 10.70.1.131)

- with 3001 prefix I send a call to trunk B (FreePBX => 10.70.1.132)

With this configuration, from trunk C (unmanaged GW => 192.168.65.110)  I dial 1000XXXX@sipxcom and my call is sent to trunk A, without any problem or proxy auth.

My custom IVR answers the call, and after a menu, transfers the call to trunk B, with a REFER to 3001XXXX@sipxcom, and gets the 407 Proxy Auth message, but he can't challenge that request cause has no way to give any credential to proxy. 

I attach a pcap on ivr side, if necessary i can attach also proxy side.

Local networks for proxy are:

10.0.0.0/8

172.16.0.0/16

192.168.65.0/24

Do you have any suggestion? There's something wrong in this scenario?

Thank you in advance for your patience.

Regards, D.

[ivar....@onrelay.net]

Hi, do you connect to trunk B via the SBC / sipXbridge? If so you can enter registration credentials by adding it as a SIP Trunk Gateway. The SBC can also convert the refer to regular invites.