D/I Mux III User’s Manual Appendix C. Accessories Installation
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Appendix C. - ACCESSORIES INSTALLATION
Coastcom provides various accessories that can be used with D/I Mux III multiplexers for troubleshooting
and maintenance purposes as well as for special applications. The following sections list and describe
these optional accessories, and include procedures for their installation.
• Card Extender
• External AC Power Supply
• External Ringing Generator
Card Extender
The card extender (P/N 30316-001) can be used in any common equipment or channel card slot. All
channel and common equipment cards will operate normally on the extender, and will allow switch and
test point access.
The internal AC power supply should not be placed on the card extender without additional support.
Warning!
Using the card extender exposes the backplane supply voltages, including 100 volts from the ringer, at a point near the front
edge of the D/I Mux III shelf.
External AC Power Supply
The External AC Power Supply (P/N 0400-0035) can supply up to ten (10) Amps of current at -48 V DC.
The External AC Power Supply has protection circuitry; a short or surge on the output will cause the
supply to shut down. Add a fuse panel if several multiplexers are to be supplied with -48 V DC. This
provides individually fused power circuits to each multiplexer, which protects the overall system in the
event of a single multiplexer failure.
Installing the External AC Power Supply
Connect the External AC Power Supply with power Off. The External AC Power Supply does not
have a power ON/OFF switch. To ensure safety, verify that the AC power cord is not plugged in
before beginning installation.
1. Connect pin 1 (chassis ground) on the power supply to pin 2 (positive voltage +) on the
power supply.
2. Connect pin 2 on the power supply to the ground TB1-1 ground on the D/I Mux III multiplexer
backplane.
3. Connect pin 3 on the power supply to the battery TB1-1 on the D/I Mux III multiplexer
backplane.
4. Plug in the External AC Power Supply power cord, providing power to the unit.
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