Yale JB-304VCT User Manual - page 12
12
6.5 Broadcast
Push
button and then speak. People nearby the other indoor phones can hear you.
6.6 Intercom between indoor phones
To start an intercom conversation, press and hold
button until the door chime starts to ring. To answer the
intercom call from another indoor phone, simply press
button. The intercom conversation is now hands free
with 2-way communication between the 2 indoor phones. The intercom function will time out in about 120
seconds.
6.7 Calling transfer
Once communication to the outdoor station has been established, press and hold
button on the active
indoor phone to ring the other indoor phones. Once one of the other indoor phone answers the ring, the call will be
transferred.
Above functions 6.5、6.6 and 6.7 are available only if there are 2 or more indoor phones in the system.
6.8 Releasing gates / garages......
There are extra unlock button with relay on the indoor phone. They are applicable for gates, garages......
CAUTION!
Max. contact load of Extra Lock Output: 2A/30VDC and 0.5A/125VAC.
DO NOT exceed the parameters, otherwise it may cause damages on the indoor phone.