SSS Siedle AS-Ta-64/1, System Manual

40

6 Supplementary functions

Group controller GC 612-…

The group controller GC 612-… in 

the 6-grid housing is used for the 
connection of a group of max. 6 

in-house telephones HTC 811-… 

In-house telephones connected to 
the group controller the buttons 1–6 
can be used to call and communi-
cate with other in-house telephones. 
The door station is switched off 
during an internal call. 

With the GC 612-… it is also pos

-

sible to signal a door call to more 
than 2 in-house telephones. For this 

function HTS 811-… units can also 

be used.

Several group controllers can be 
used in an intercom unit. In addition, 
switching and control functions can 
be executed from every connected 

in-house telephone HTC 811-… If 

a door call is made to an in-house 
telephone which is currently con-
ducting a call, this is interrupted and 
an engaged signal sounds.  After 
replacing the receiver the door call 
is signalled.

Call differentiation HTC 811-…

Main door call: 3-tone chime, 
storey door call: 1st  and 2nd chime 
tone of the three-tone chime, sub-
sequently normal 3-tone chime
Internal call: 3-tone call

Storey call: 2-tone call (ERT button 

connected directly at the HTC)

Door parallel call

The door call can be signalled simul-
taneously in conventional systems 
at up to 2 in-house telephones. 

With the GC 612-… it is possible to 

signal a door call at up to 6 in-house 
telephones. This always actuates 
two in-house telephones simultane-
ously. With more than two parallel 
telephones, these are always called 
in pairs with a time offset.

Speech connection

For each group controller, only one 
call can be held. If an internal call 
already exists within a group, it is 
possible to place an additional call 
from the door loudspeaker only to 
another in-house telephone which 
is not directly connected to the 

GC 612-… The group controller acts 

in relation to the 1+n side circuit 
installation in the same way as an 

in-house telephone. Each GC 612-… 
requires the NG 602-… for its own 

power supply.

Switching and control functions

• Switching and control functions 
are possible in conjunction with the 

SFC 602-… A maximum of 6 control 

functions can be actuated from each 

HTC 811-… in the group. Control 

functions can be executed at any 
time with the receiver down or 
during an existing speech connec-

tion. Settings at DIL switch 2 may be 

necessary in the in-house telephones 

HTC 811-…

Operating elements GC 612-…:

• One programming switch in order 
to enable the programming mode 
• One status LED to display the pro-
gramming mode and saving.
• 8 DIL switches to determine the 
required functions/for programming.
• DIL switches 1–6 for assignment 
of the door call to the in-house tel-
ephones 1 to 6

• DIL switch 7

ON 

SFC 602-… is connected 

at the group controller

OFF

SFC 602-… is connected 

at the door loudspeaker

If DIL switch 7 is set to OFF, DIL 
switch 8 is non functional.

• DIL switch 8

ON

Control functions 5 and 6 

act on the SFC 602-… at 

the door loudspeaker

OFF

Control functions 5 and 6 

act on the SFC 602-… at 

the group controller

Internal call

From each HTC 811-… unit in 

the group, each other in-house 
telephone of 

the same

 group can 

be called. The following procedure 
has to be observed here: Pick up the 
receiver and only then actuate the 
required call button at the in-house 
telephone.

Secondary signal unit

For door call 1 (terminal 7.1) a 
potential-free contact S1/S2 is 

available at the GC 612-… 

(max. 24 V, 2 A).

Installation

The in-house telephones at the 

GC 612-… are installed in star for

-

mation.
Maximum conductor lengths 
between: 

• GC 612-… and telephones 
100 m/328 ft.
• GC 612-… and door station 
500 m/1640 ft.

Wiring diagram without video 
AS-Ta-74/1 on page 32

As-delivered status of the 

GC 612-…

The door call inputs are assigned 

to telephones 1:1. Terminal 7.1 
(input 1) is assigned to the  1st tele-
phone, terminal 7.6 (input 6) to the 

6th telephone.