Chapter 3. Installation
46
Shelves
The D/I Mux III multiplexers are approximately 17 inches wide (not including the mounting ears) and
11.75 inches deep.
The height of the D/I Mux III is different for each of the three models. See Figure 3-1, and Table 3-1, for
shelf measurements and requirements.
Table 3-1. Height Requirements for Various D/I Mux III Models
D/I Mux III Model Height (in
inches)
8-slot shelf 5.25
12-slot shelf 7.00
24-slot shelf 10.50
Access Requirements
Wiring and connections to the D/I Mux III shelf are made at the rear of the unit, except for the
Advanced Common Control Unit (AMCU), Smart Omni-Orderwire (S/OS), Subrate Data
Multiplexer (SDM), and Dual Synchronous Data Channel Unit (DSDCU) line cards which have
cable connections through their respective front panels.
The D/I Mux III line card and common equipment modules are approximately 10 inches long.
Because all modules are inserted into the front of the shelf, enough space must exist in front of
the system to allow installation and access to the modules. Coastcom recommends allowing an
unobstructed depth of 18 inches at the back of the shelf for wiring access, and an unobstructed
space of 30 inches at the front of the shelf for module access.
Power Requirements and Capacity
D/I Mux III systems are powered from three different types of power sources.
• -48 VDC
• -24 VDC
• 110 V AC
When connecting several systems to a single power source, a fuse panel should be employed to prevent
a group power failure and to isolate each system. When using AC power, a surge protector, or use of an
uninterruptable power supply, is recommended.
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