Installation
Connecting to an RCH Junction Box
MC3000 Digital Deskset Operator and Installation Manual 2-11
(6880309L15-A)
Connecting to an RCH Junction Box
The deskset can be connected via an 8-wire CAT-5 cable (4 wires for audio and 4 wires
for data) to an RCH Junction Box (CDN1337, CDN6304, CDN6683) which is then con-
nected to the radio. Figure 2-10 shows how the cable must be constructed.
If you are using an RCH Junction Box, you will need to do the following:
1. In the Configuration and Test program:
• set option 9 “Busy Polarity” to High
• set option 12 “RX Impedance and Circuit” to Differential
2. Ensure the wiring of the cable is exactly as per Figure 2-10.
3. Connect the cable from the RCH Junction Box (Host port) to the 8-pin RJ45 connector
labeled “Audio/Data” on the back left hand side of the MC3000 deskset.
Figure 2-10: Specially Wired Cable for MC3000 Deskset with RCH Junction Box
WARNING: If the settings described above are not properly applied, damage to
the equipment may occur. It is recommended that each end of the cable be
labeled to reduce the likelihood of incorrect connection.
1
8
To RCH-J-Box
HOST Port
To MC3000
Deskset
Wh/Green 1
Green 2
Wh/Orange 3
Blue 4
Wh/Blue 5
Orange 6
Wh/Brown 7
Brown 8
1 Green
2 Wh/Brown
3 Orange
4 Wh/Blue
5 Blue
6 Wh/Orange
7 Brown
8 Wh/Green
MC3000 side RCH J-Box side
1
8
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