Because RFL™ and Hubbell® have a policy of continuous product improvement, we reserve the right to change designs and specifications without notice.
2.3.2 REPEATER SHELF
The Repeater Shelf is an enclosure that provides space for additional channel modules if the system
requires more modules than the Main Shelf can accommodate. (See Figure 2-7)
The Repeater Shelf is the same size as the Main Shelf but contains no E1 Common Modules. The
Repeater Shelf is connected to the Main Shelf by a signal cable between bus repeater modules. In most
cases, the Repeater Shelf can be powered by the Main Shelf power supply through a separate power
cable. The Repeater Shelf can be equipped with its own supplies, however, if the Main Shelf power
supply does not have sufficient excess capacity. (See Section 3 to determine the power requirements of
your system.)
Note that physical slots on the Main and Repeater Shelves do not have a one-to-one correspondence
with 64 kbps time slots. For example, a wideband data channel module that occupies one physical slot
could be set up to operate at 64 kbps and requires one time slot, or it could be set up to operate at 384
kbps and requires six time slots. Conversely, a channel module may use only one time slot but may
require multiple physical slots, usually to accommodate interface connectors and circuits in the I/O
module.
Installations containing multiple shelves are connected together with Bus Repeater Modules and signal
cables. Refer to paragraph 4.5.2 for more information on the Bus Repeater Module.
All E1 Common Modules, channel modules, and power supplies plug into the front of the Main or
Repeater Shelf. All power and signal input and output connections are on the rear of the shelf. All
common module and channel module input/output connectors are on easy-to-install, rear-access
Module Adapters. (See paragraph 2.3.8 for more information.)
IMUX 2000E1 RFL Electronics Inc.
April 1, 2007 2-8 (973) 334-3100
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