Here is the issue:
GDS3710 door bell button is pressed.
GDS3710 is set to call RING GROUP on UCM.
Ring group has five GXP21XX, a WP820, and the DP730.
All phones ring, with OPEN DOOR appearing on softkey on each phone.
If the OPEN DOOR softkey on DP730 is pressed (before the call is answered on the DP730) then ring group call is cancelled and stops ringing ANY phone. However, the door is not opened, but the call progress is ended.
So, if the OPEN DOOR key is pressed on the DP730, without the call being answered by the DP730, then the door bell key has to be pressed again to generate the ring group call so the call can be answered and the OPEN DOOR softkey pressed and generate the open door action.
This does not occur with any other GXP21XX, GXP16XX or WP820. This only occurs with the DP730.
Since the ring group call progress has stopped, all other phones will assume someone has answered and handled the caller at the GDS3710. This is a definite BUG for operation with the DP730, as pressing the OPEN DOOR softkey, without answering the call, should not cancel the call.
This will definitely stop us from deploying the DP730 with the GDS3710 in this type of install…