Installation
127
Aastra 470 as of R1.2
syd-0337/1.2 – R1.2 – 11.2011
Any playback equipment (tape recorder, CD player, etc.) with a line output can be
used as the audio source. It is advisable to merge the left/right audio signal via 2 re-
sistors (see
Warning
The default value of all FXS interfaces is configured to
Phone/fax
. Audio
equipment may be damaged by the DC or AC voltage imposed.
Make sure that the mode of the FXS interface is configured to External
audio source before connecting audio equipment.
Note:
The customer is responsible for all copyright matters relating to any
music playback.
Tab. 67
Technical data for FXS mode: External audio source
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 system, alarm system or outdoor
lighting system).
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. 60
Connection for FXS mode: Control output
Input impedance
approx. 15 k
Ω
Input level
configurable in AMS
Input circuit
asymmetrical
Output resistance audio source
< 1 k
Ω
Installation cable
NF cable screened (required for low levels)
a
b
24 VDC
max. 25mA
FXS interface