I have a 28xx router with FXO ports setup as a h323 gateway with CM6.1. On the gateway i setup a trunk group with the 4fxo ports, and configured a dial peer to use this trunk group. This works under normal situations, and if the first port is in use the second port will be used, etc, etc.
The issue i found is that if i unplug the analog line from the 1st fxo port, i get a busy signal when i dial a pattern which uses this h323 gateway. If i leave the analog line unplugged, and do a "shut" on the voice port, then the call goes out succesfully of the next fxo port.
So the issue is that if the h323 gateway goes to use an FXO port and doesnt get dial tone it automatically returns a busy signal rather then roll over to the next port.
Is there a way to fix this??? It has happened on multiple gateways, and different IOS versions.