SIP Timeout

[mikewece]

I have an Avaya SBCE SIP Proxy installed in my DMZ, which is running on a 1590 Appliance at R80.20.05.  When the phone boots up it works fine, I am able to make and receive phone calls, but after a few minutes, the phone no longer has dialtone.  The phone itself is still functional, and if I log out and log back into the phone it starts working again.

My thoughts are that something is timing out, just not exactly sure what.  Does anyone have any idea on how to either correct this or figure out what exactly is timing out?

Thanks

[HeikoAnkenbrand]

Maybe this sk will help:

Avaya VoIP calls with Avaya Call Manager fail through Check Point Security Gateway