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System Functions and Features as of I7.9
472
Features
sy
d-
020
0/3.
0
– I7.
9
– 1
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.2009
8. 7. 12
Door function
There are two ways of connecting a door intercom (TFE):
•
Using an options card OI-2DOOR (20x5) and ODAB (A150/300)
•
Using an ordinary analogue terminal port
In a connection using an options card, the equipment or installation is controlled
via relays and a control input on the options card.
In a connection using an analogue terminal port the TFE must be capable of send-
ing and receiving DTMF signals as the control is effected acoustically via a speech
path.
The following functions are available with both connection variants:
•
Door bell triggers a call
•
Opening doors
•
Dial door intercom
8. 7. 12. 1
Door bell
Depending on the system configuration, pressing the door bell triggers a call to
any internal destination B.
Detailed Description
Tab. 323 Door bell
Interface
Operating sequence / signalling on the ter-
minal
Scope
B
• When the door bell is activated the allocated
destination will ring with a special ringing
tone. The ringing time is limited to 20 sec-
onds.
• If B is busy, he will obtain call waiting except
if he himself is already in an enquiry call.
Call
waiting on exchange connection
and
Protect
against call waiting
are not taken into
account.
Possible interfaces:
Users: internal, PISN, UG
Restriction:
• If user B has diverted to an external destina-
tion, the connection to the door intercom
will be switched through.
• The connection created with the door inter-
com is limited to 5 minutes (forced discon-
nect) if the call partner (PISN or external) is
connected to the public network.