I have a ATA 191, connected to UCM 10.5.2 The elevator (an analog phone) is programmed to call an extension in our company to notify that someone may be stuck, and it does that just fine. The issue I'm facing is when the monitoring station hangs up, the line stays open causing the phone in the elevator to go off hook, not hang up, it will eventually time out. As it stands now, the monitoring station has to enter a DTMF code which hangs up the Elevator phone. So my question is how can I get the ATA to recognize that the Monitoring stating hung up and it should hang up the Line going to the Elevator. Or for that matter UCM. We are using 88xx on SIP. Any advice would be much appreciated.
