We have SPA504G phones with only Ext1 enabled. We use the other line keys to pick up parked calls in Asterisk via:
fnc=sd+blf;sub=1234@proxy
This works smoothly except for one scenario:
When the user presses (by mistake) one of those "unpark" line keys while in an active call with a customer, this active call and the parked call from another customer are bridged (and obviously the call is gone from our phone).
Is there a way to force the Cisco phone to put the active call on Hold before getting the parked call?
or
Is it possible to somewhat temporarily deactivate/disable the unpark line keys while there is an active call?
Thanks,
Matt
