Trunk H.323 between IPO 9 and CM 6 down after a while

[whedhl]

Hi ,
just configured an H.323 trunk between IPO9 and CM 6 , both CM and IPO recieves and makes calls properly but trunk becomes down(idle status) after a while . the trunk becomes up again after first call from the IPO .
.
Any idea to solve this problem ??????

Thanks

[mlombardi1]

Try disabling Layer 3 Test on the CM signaling group used by the trunk to the IPO. I've had this cause all sorts of issues in the past with IPO inter-op.