This hub allows home or building occupants to speak to visitors at the front
door or entry using existing telephones and a door/entry station. The Front Door
Station Hub does not interfere with telephone company services such as Call
Waiting and Caller ID. The hub has an upgrade option (HBFDSR) permitting home or
building occupants to release door locks via the telephone, allowing visitors to
enter.
Features The HBFDS comes with one door station and can
accept one additional door station.