Because RFL™ and Hubbell® have a policy of continuous product improvement, we reserve the right to change designs and specifications without notice.
2.3 MULTIPLEXER COMPONENTS
Each IMUX 2000 multiplexer contains the following components:
Component See Paragraph
1. Main Shelf 2.3.1
2. Repeater Shelf (optional) 2.3.2
3. CM4 Common Modules 2.3.3
4. Common Module Interface Adapters 2.3.4
5. Power Supply Module(s) 2.3.5
6. Power Supply Alarm I/O Module 2.3.6
7. Channel Modules 2.3.7
8. Module Adapters 2.3.8
Each of these components is described in the paragraphs that follow.
2.3.1 MAIN SHELF
The Main Shelf is the enclosure for the IMUX 2000 multiplexer. It has plug-in slots in the front for one
main power supply and one optional redundant power supply. It also provides 18 physical slots for E1
common modules and channel modules. Plug-in slots at the rear accommodate module adapters (MAs)
and optical interface adapters (OIAs). (See Figure 2-6.)
Each IMUX 2000 multiplexer (terminal or drop/insert) includes one Main Shelf which can be installed
in a standard 19-inch equipment rack. The Main Shelf is 5.25 inches (13.3 cm) high, and occupies
three rack units of cabinet space (3RU).
The following are recommended slot assignments in the Main Shelf for systems with redundancy:
1. In terminal multiplexers with E1 electrical interfaces or fiber optic interfaces, the standby CM4
should be installed in Slot 1, and the main CM4 should be installed in Slot 2. Slots 3 through 18
are available for channel modules.
2. In drop/insert multiplexers with E1 electrical interfaces or fiber optic interfaces, the standby
D/IA CM4 should be installed in Slot 1, the main D/IA CM4 should be installed in Slot 2, the
standby D/IB CM4 should be installed in Slot 3, and the main D/IB CM4 should be installed in
Slot 4. Slots 5 through 18 are available for channel modules.
The following are recommended slot assignments in the Main Shelf for systems without redundancy:
1. In terminal multiplexers with E1 electrical interfaces or fiber optic interfaces, slot 1 should be
left blank, and the main CM4 should be installed in slot 2. Slots 3 through 18 are available for
channel modules.
2. In drop/insert multiplexers with E1 electrical interfaces or fiber optic interfaces, slot 1 should
be left blank, the main D/IA CM4 should be installed in Slot 2, slot 3 should be left blank, and
the main D/IB CM4 should be installed in Slot 4. Slots 5 through 18 are available for channel
modules.
IMUX 2000E1 RFL Electronics Inc.
April 1, 2007 2-6 (973) 334-3100
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