[CUCM] <=> [2811 GW Pri T1] <=> [PSTN / Allstream] (Site 1)
<=> [1861 GW FXO] <=> [PSTN / Allstream] (Site 2)
<=> [1861 GW FXO] <=> [PSTN / Telus] (Site 3)
We setup new site (Site 3), Calling from [PSTN] to CUCM IP Phone.
IF call come from site 3 1861 FXO GW only have audio 5 minutes.
All call if short then 5 minutes working fine.
After 5 minutes no audio in both directions,Both side IP phones still stay connected, phone time counter is incrementing.
At router debug vmp sign (see nothing when the audio lost) .
sh voice call sum (see the line still up).
I already open a TAC, no result yet.
Any suggestion ?