Hello Folks, Any feedback would be TRULY appreciated. I've spent hours trying to get this issue resolved and it seems like im trying to find a needle in a haystack.
I also hope I provided all the necessary needed information. Thanks
MXe-III (Physical)
MiVoice Business - 8.0 SP2
Windstream PRI Trunks
MiCollab (Virtual - LAN)
9.1.3.202 (9.1.3 FP2?)
MiVoice Border Gateway (Virtual - DMZ)
11.0.0.294 (11.0 ?)
Fortigate 200e
SIP Helper / SIP ALG Off
Traffic Shaping - high-priority
dscp 101 110 EF (Expedited Forwarding) for IPv4 Policy and Traffic Shaper
Issue
Callers have MiCollab for Mobile on their cell phone using the softphone. Caller will dial a recipient (external call) and after 3,5,14 minutes (times are avgs) the recipient can no longer hear the caller. The caller can still hear the dialer, putting call on hold and unhold makes no difference.
If we reverse the call flow (external user calls softphone user) we've been able to reproduce the issue. In this case the external caller can't hear the softphone user after 3,5,14 minutes (times are avgs).
It does seem that most of the calls start having this issue around 14 minutes.
Changes we've done:
Created new SIP Device Capabilities Profile
On the "Timers" Tab
Session Timer = 90
Session Timer: Local as Refresh = Yes
On the "Signaling and Header Manipulation" Tab
Disable Reliable Provisional Responses = Yes
MiCollab Deployment Profile
Softphone/MBG - Default audio codec - Best compression (G.729)
I think we're a minor version down on both MiCollab and MBG so upgrading to the latest is one option.