I need an explanation about traffic flow, so I can locate where the problem is...
I have an OXO pbx behind firewall with analog and digital phones. Connection with provider is trough SIP trunk, witch goes trough Sophos firewall.
PBX is connected on LAN network, and proper rules are set in the firewall.
Now, I have subscribers that have Immediate diversion to their mobile phones.
When I call that subscriber from user phone, connection is well established and we can hear each other.
If I receive a call from outside, and it's transferred to diverted subscriber, I assume that call not dropping, but we can't hear each other.
If we made conference call instead of transfer, we can hear each other all three sites.
-mobile calls PBX -> PBX answer on user 110 (we hear each other)
-PBX from user calls other user (No. 110 calls 141 diverted on mobile)
- user 110 transfers the call (mobile and other mobile not hear each other)
- if user 110 make conference joining on all 3 parties we can hear each other
A year ago this was working as is should, but since then there was some changes in PBX and in firewall.
So, the question is how traffic flow when call is transfered, and how when have conference call?
I have .pcap file captured from PBX web interface, but there are 2 separate calls, for every direction that PBX serves and cannot see (understand) where and how should look when calls are connected with transfer.
I hope I was clear...
Ccavdar
