Features
526
System functions and features as of R3.0
syd-0367/1.3 – R3.0 – 03.2013
9. 7. 13. 1 Door bell
Depending on the system configuration, pressing the door bell triggers a call to 
any internal destination B.
Detailed Description
Tab. 343 Door bell
Door bell input on an options card
• The door bell is connected directly to a control input of the options card.
• One internal user can be allocated to the door bell input for each case of the Day, 
Night and Weekend positions.
• The dialled destination is dependent on the position of switch group 1 if another 
switch group is not assigned to the control input of the option card.
Tab. 344 Door bell on the options card: System configuration
Door bell when the door intercom system is connected via an analogue 
terminal port
• The destination is configured directly in the connected TFE.
• If the dialled destination depends on the position of a switch group, a CDE call 
number must be entered in the TFE.
Function in prefix dialling
Call user: via the 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.
Parameter Parameter value Remarks
Door intercom system Destinations <user No.> for switch position <1,2,3>