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DHS- L Instal lation
External Music Source
The system provides two external music inputs for connecting. The same music source
may be used for both inputs.
The music source may be any device which provides a line output, including tape players,
radios, or CD players. If using a radio, use only the headphone jack if no line output
connection is available.
To install an external music source:
Connect the line output leads of the music source to the wire1(+) and wire2(-)
connections on the MISB connector.
Music Level Adjustment
1. Access an idle CO line, and dial into the system on another CO line.
2. When the system begins to ring, press [HOLD] to place the first call on hold.
3. Answer the ringing CO line. You should hear the MOH from the previous (now
holding) CO line.
4. Adjust the music level at the source. That is, use the volume control of the radio (or
other music source) to adjust the MOH level to a desirable level.
If a comfortable desired music level cannot be obtained using these techniques, it is
likely that the music source is not properly matched to the MOH input circuitry.
How to Disconnect Background Music
To prevent Music-on-Hold from playing in the background:
Move Jumper (J2) to pins 1 and 2.
Loud Bell Control (LBC)
When the MISB is installed, the system provides two dry contact closures 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.
1. Determine which CO lines should operate the Loud Bell Control (LBC) relay. Program
each of these lines separately for LOUD BELL = Y.
2. Terminate the other end of the cable on an industry standard 66M1-50 block for
interconnection to the loud bell and power source.
Do not use the speaker outputs of any music source.
In some circumstances, there may be broadcast restrictions associated with music. Check
with the original distributor and/or the radio station for copyright and broadcast
restrictions concerning Background Music and Music-on-Hold.
MOH1 to BL/W
MOH2 to OR/W
Chapter 2 - Description a nd Installation
2-47
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