Vodavi Starplus DHS, Technical Manual

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DHS Installation 2-49
12. External Music Source
The Basic KSU is shipped with the Standard MOH/BGM Module. This module is located on
a stand-off post toward the upper right corner of the CPU Module when viewing the
installed KSU. The module provides a 1/8 in. phono jack (refer to
Figure 2-25: 1/8 in. Phono
Jack ) labeled JK1 MOH JACK for direct connection to an external music source. The
system music input impedance is 2 ohms. A trim Potentiometer (POT) is also provided on
the Standard MOH Module for signal attenuation.
Music Level Adjustment
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 for further
adjustment.
7. 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.
External Music—Option Module
The Option Module may be installed for several feature upgrades. One of these upgrades
is the addition of a second music source. When installed, the Option Module provides an
MOH 1/8 in. phono jack (refer to
Figure 2-25: 1/8 in. Phono Jack ) labeled J2 MOH (located
at the bottom-edge of the Option Module toward the right) that replaces the music
circuit of the Standard MOH/BGM Module and an 1/8 in. phono jack labeled J4 BGM that
adds a second BGM channel. J4 is located at the bottom edge of the Option Module
center left.
To install the external music source:
1. Attach an 1/8 in., two-conductor, phono plug to one end of a length (5 ft. min.) of
shielded cable.
2. Connect the other end of the cable to the speaker output terminals of the music
source.
OR
3. If the music source has an earphone jack, attach another 1/8 in. phono plug (or other
specified connector) to the other end of the cable, and plug it into the earphone jack
on the music source.
4. Plug in the AC power cord for the music source. If possible, use a separate AC outlet
than the one being used for the KSU. Turn ON the AC power to the music source.
5. Insert the 1/8 in. phono plug into the appropriate music source jack inside of the KSU.
6. Since the MOH music source serves to provide MOH/BGM, it is best to adjust the
input level such that MOH is at a comfortable level.
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.