We have multiple VG320 gateways with analog phones connected. Users try to pick up an analog phone to make an "overhead page" on the paging system. The user dials a couple digits and the call is routed to a 4300 voice gateway with an FXO port which sends their audio to an external paging system. When the user hangs up the page, I see the phone go back into "on-hook" status on the VG320. However, shortly afterwards, the FXS port goes back into "off-hook" status, even though the user has not touched the phone. When anyone tries to call the phone that is stuck in "off-hook" status, they receive a fast busy signal.
If the person picks up the phone that is stuck in "off-hook" status, they can place a call to a VoIP phone (7811), hang up the call, and then everything works fine after that.
IN SUMMARY: Basically, paging to the FXO port causes the FXS port to hang in an off-hook status, and they are able to clear that status by then calling a VoIP phone. However, sometimes the same symptom happens when an analog-to-analog from FXS-to-FXS call is placed, but it is doesn't seem to happen as often.
We have both SCCP and MGCP gateways, it seems we haven't been able to re-produce the issue on the SCCP gateways yet.
