Mitel 430 System Manual page 129

FXS mode: 2-wire door
In this mode 2-wire door intercoms with DTMF control functions can be connected. The
no-load voltage in this mode is 24 VDC. The loop current is limited to 25 mA.
Fig. 54 Connection for FXS mode: 2-wire door
Tab. 61 Cable requirements for FXS mode: 2-wire door
Core pairs × cores
Stranded
Wire diameter, core
FXS resistance
Line length 0.6 mm diameter
Screening
FXS mode: Control output
If an FXS interface is configured as a control output, the signal can be used to control
external devices or equipment (e.g. heating, alarm or outdoor lighting systems).
The no-load voltage is 24 VDC; the current is limited to 25 mA. A connected relay must
be of the type 24 VDC and must not draw more than 300 mW in power.
There are no special requirements for the cables.
Warning
Control outputs must have a floating connection.
Mitel 415/430 as of R4.1
syd-0580/1.2 – R4.1 – 08.2016
a
b
FXS interface
1 × 2
only with lengths > 200 m
0.4 ... 0.8 mm
max. 2 × 200 Ω
max. 3 km
not required
Installation
129