Installation
155
Aastra 470 ab R3.0
syd-0337/1.5 – R3.0 – 05.2013
FXS mode: General Bell
One FXS interface per communication server can be configured for the connection
of a general bell. It is possible to use commercial auxiliary bells designed for con-
nection in parallel to analogue terminals as a general bell. However the impedance
of the connected general bell (or total impedance in the case of several devices
connected in parallel) must not fall below 1 k. The ringing voltage is 48 VAC. An
AC relay must be interposed if connecting a large number of auxiliary bells.
Fig. 61 Connection for FXS mode: General Bell
See also
"General bell on FXS interface" in the "System Functions and Features"
System Manual.
48 VAC
48 VAC
a
b
FXS interface
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