Access Control Door Phone

I am installing a Brekeke PBX and the customer would like to be able to open from any extension teh main entrance door.

Is there any device that could be recommended for that purpouse?

Thanks for your cooperation.

Try the Valcom 2901 (1 door) or 2904 (4 door) entry systems. The devices are designed for connection to a dedicated telephone or connected to an analog PBX port. A visitor presses a button on the entry speaker which dials a configured extension. Whomever answers the call can talk to the visitor and then dial a three digit code to trigger a strike/latch output to unlocck the door. In the case of a VOIP PBX, a FXO adapter will be required to interface the entry system to the PBX. Used ones turn up on ebay regularly and once in a while a new one pops up.

Hi,
Thank you very much for your recommendation, I found a used one in Ebay either.