16
The TFE Module 403 (door hands free unit)
The TFE module 403 features an interface
(TFE 1) that conforms to the Telekom 2-wire
TFE (CE interface) specification for connect-
ing DoorLine T01 to T04 door hands free
units. The dialling method is DTMF. The tel-
ephone system supports up to four bell
pushbuttons.
It features an interface (TFE 2) conforming
to the 4-wire TFE specification FTZ 123 D12
for connecting door stations with amplifiers.
The telephone system supports one bell
pushbutton. Optionally, a loudspeaker sys-
tem or an audio module can be connected
to the FTZ 123 D12 interface for announce-
ments.
Figure 11: Pin assignments of
the TFE module 403
door hands free unit with
interface to FTZ 123 D 12
potential-free
bell button
Mustermann
230 V
TO NF NF´ TS
KT KT´
KT´
NF
NF´
KT
TS
TS
TO
TO
TFE 2
0 V
NF
NF
U
≈
TFE 1
NF, NF´ = DC-free speech circuit
KT, KT´ = Terminals for a potential-free bell
button
TO
= door opener relay contacts
(potential-free)
TS
= relay contacts R1 for activating
of an external amplifier
230 V
door hands free unit
with CE interface
0 V U
≈
NF
bell transformer for
door opener,
max. 24 V AC
bell
transformer for
door opener
Slots: X=1 to 4, freely optional
