Outgoing Calls to Lync drop after 30 seconds

[angelbug]

Hello,

We have a weird issue with calls going to Microsoft Lync through one of our PBX's.

When we route calls through the external sip gateway on our US OXE, the call drops after 30 seconds. If we route the call via our UK OXE it works fine.

Help!!

[cavagnaro]

Come on! Piece of cake! Move the mouse over the menu, now go to that value and change it! Press F1 and you are done!


Yes, that is how it is when you ask for help without a single clue...
Post logs

[giovanni.attolini]

The same problem here, drop calls after 30 seconds, but here there is a SIP Extension using linksys PAP2T, not a SIP gateway from OXE to other vendor. Attached is the trace (only SIP packets), the problem seems that the ATA doesn't respond to 200 OK sent by OXE. Is there something that can be done in OXE side?

Detail: only on generated calls.

[giovanni.attolini]

Problem solved.

Problem:
- OXE sends the name of node in SIP packet's contact field (image attached) instead of IP address;

Solution:
- Changing on topology, from "spacial redundancy" to "CS main with PCS", I didn't found a solution using the spacial redundancy topology;
- After the topology changing, exclusion of node name of file hosts (/etc/hosts), I did it like root.

[cavagnaro]

hi Giovanni,
Glad you found a solution but...now test to do a bascul...what happens?
If I'm not wrong you are suffering from Spatial Redundancy SIP issues, where you have to fine tune your configuration.
Check here in the forum for more info about how to configure your DNS server

[giovanni.attolini]

Thanks Cavagnaro!
Now I am working in other topology format, without bascul facility, I've changed between spatial redundancy to CS and PCS topology. I will try to find the problem and return the configuration to test.