DHS-E Installation 3-33
Figure 3-12: Motherboard Components
Conditions
If the one-way paging equipment requires DTMF signaling from the key telephone,
then an unused CO Line should be dedicated for proper page interface.
For Talk-back Paging or Multi-zone External Paging, the manufacturer recommends
using a vacant CO line port for best operation.
A 600 ohm interface is provided on every CO line; therefore, any available CO line may
be used for paging.
Since all CO line dialing is subject to toll restriction, a CO line port will not connect the
station's audio until at least one DTMF digit is dialed.
It may be necessary to assign the CO line being used for paging as a PBX type trunk
with one-digit or two-digit access. Therefore, normally toll restricted extensions may
still make external pages, without being restricted.
13. External Music Source
The DHS-E KSU is shipped with two MOH/BGM Input Jacks that are located on the right
edge of the Main Processor Board. The board provides two 1/8 in. phono jacks (refer to
Figure 3-11) labeled J1 (MOH), and J3 (BGM) for direct connection to an external radio
tuner, CD/tape player or other music source. The system music input impedance is
2.0 ohms.
To adjust the music level:
1. Set the trim POT (labeled VR1 Channel 1, VR3 Channel 2) at about mid-point.
2. Access an idle CO line, and dial into the system on another CO line.
Loud Bell
Page
MOH
BGM
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