[cisco-voip] Call length on paging ports

[Loren Hillukka]

I have a plant building with a 4351 connected to a paging system via an FXO port.  Site has phones connected to CUCM, gw is not MGCP.  Users at the plant are notorious for paging, then pressing "hold" instead of "end call" on the Cisco phones they page from. The plant floor then gets MOH playing and nobody else can page until I shut/no shut the port or they unplug the cable from the fxo port. 

Any idea if a max length of call timer can be applied only to that one fxo port, to disconnect any call to it after 15 seconds or so? 

Thanks