Aastra 470 - Page 153

Installation
153
Aastra 470 ab R3.0
syd-0337/1.5 – R3.0 – 05.2013
FXS mode: Control output
If an FXS interface is configured as a control output, the signal can be used to con-
trol external devices or equipment (e.g. heating, alarm or outdoor lighting sys-
tems).
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.
Fig. 59 Connection for FXS mode: Control output
a
b
24 VDC
max. 25mA
FXS interface