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2-50
To set a desirable MOH level:
1.
Set the trim POT (labeled VR1 MOH VOL) at about mid-point.
2.
Access an idle CO line, and dial into the system on another CO line.
3.
When the system begins to ring, press [HOLD] to place the first call on hold.
4.
Answer the ringing CO line. You should hear the MOH from the previous (now
holding) CO line.
5.
Adjust the music level at the source. That is, use the volume control of the music
source to adjust the MOH level to a desirable level.
6.
If the music begins to sound distorted do not increase the source level any further.
Rather, adjust the source level down slightly and use the trim POT (labeled VR1 MOH
VOL) for further adjustment.
7.
If a comfortable music level cannot be obtained using these techniques, it is likely
that the music source is not properly matched to the MOH input circuitry. You may
need a 600 ohm matching transformer to properly interface the music source.
8. The BGM music level can be attenuated using the trim POT VR3 BGM VOL.
13. Loud Bell Control
When the Option Module is installed, the system provides a dry contact closure to signal
externally powered alerting devices for any incoming CO Line call. Transferred CO Lines
that recall system wide will also activate the LBC, in the same cadence as for an incoming
CO Line ring.
Installation
1. Determine which CO lines should operate the Loud Bell Control (LBC) relay. Program
each of these lines separately for LOUD BELL = Y.
2. Cut a length of cable to run from the MDF to the Option Module.
3. Attach a male 1/8 in. phono plug to one end of the cable.
4. Insert the 1/8 in. phono plug into the LOUDBELL jack (left-most 1/8 in. jack along the
bottom edge of the Option Module).
The music source must be placed 5 to 10 ft. away from the KSU, to avoid any interference.
Battery/Power
1/8 in. phono plug
the LBC jack on
Option Module
Figure 2-27: Loud Bell Control Installation
Supply
Bell
DHS Installation
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