Aastra 470 System Manual page 152

Installation
FXS mode: External audio source
One FXS interface per communication server can be configured for the connection
of audio equipment. In this mode the FXS interface becomes an audio input that
can be used for the following purposes:
• to play music or an announcement to connections with callers on hold ("Music
on hold" function).
• to play music or an announcement for the announcement service (announce-
ment prior to answering), voice mail greetings or for "Music on hold" and then to
store it as a wave file.
FXS interface
Fig. 58 Connection for FXS mode: External audio source
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 Fig. 58).
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. 69 Technical data for FXS mode: External audio source
Input impedance
Input level
Input circuit
Output resistance audio source
Installation cable
152
1k
a L
R
1k
b Gnd
approx. 15 kW
configurable in AMS
asymmetrical
< 1 k
NF cable screened (required for low levels)
line out
syd-0337/1.5 – R3.0 – 05.2013
Aastra 470 ab R3.0