Siemens HiPath 1120 - Figure 3-45 Connections of the TFE-S Interface; TFE-S Interface

Modules
3-108 Service Manual
Entrance telephone
3.11.1.2 TFE-S interface
This links an interface of system analog connections with an entrance telephone and a bell
button. This is controlled using a system that allows the connection of commercial-type passive
button pads. Each TFE-S interface requires its own power supply.
Figure 3-45 Connections of the TFE-S interface
7
Warning
In the analog interface, the a wire must be connected to the negative and the b wire
to the positive.
TUE
TUE
AC
AC
X3
6 - 12V
Transformer
VCC
Latch
VCC
MIC power supply
Low-voltage detector
(high impedance)
VCC
Call detector
(high impedance)
≥
VCC
Voice circuit
amplifier
ca. 44s44
Mute
X4
a/b
X5
X5
MIC+
MIC-
LS1
LS2
Bell button
Button pad
KLI
KLIX4
X3
5 mA
AC
DC
1
bell
electric
VCC