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Installation Prerequisites
Space Requirements
The Cisco 6100 Series system fits in a 23-inch wide rack. See Table 2 for individual rack
space requirements.
Table 2
Component
Cisco 6100 chassis
POTS splitter
•
•
Fan tray
1. RU = rack unit. One RU is equal to 1.75 inches (4.45 cm).
2. Leave 1 RU of space under the fan tray. This space allows for the intake plenum and for cabling back to front for
Power Requirements
The central office (CO) power source or rectifier supplies external power to the system as –48 VDC
from to the fuse and alarm panel. Power connections from the fuse and alarm panel are wired separately
to the Cisco 6100 chassis and the fan tray. Connections for single- and dual- power feeds are provided.
The power input connections are redundant, and only one is absolutely necessary for system operation.
The nominal voltage is –48 VDC; the minimum operating value is –36 VDC; and the maximum
operating value is –60 VDC.
Before you connect the system to a power source, verify that the power source is properly grounded and
that it falls within the internal power supply rating. For the internal power supply rating for the
Cisco 6100 chassis, refer to the power supply label on the back of the chassis.
Depending on your configuration type, calculate the typical power required for each Cisco 6100 Series
component. After you calculate the typical power, determine the minimum fuse value for each
component that is wired to the fuse and alarm panel. Use Table 3 to calculate the minimum fuse rating
necessary for each of your Cisco 6100 Series system components.
The power rating label supplied on the rear of each chassis and fan tray indicates the
Note
maximum fuse value for the chassis or the fan tray.
Table 3
Fuse Calculation for the Cisco 6100 Series System Components
Component
Instructions
1,2
Cisco 6100
1a
If you are using DMT-2 ATU-C modules, multiply 12W by the total number of modules in the
Cisco 6100.
1b
If you are using flexi ATU-C modules, multiply 18W by the total number of modules in the
Cisco 6100.
1c
Add the amounts for lines 1a through 1b.
Cisco 6100 Thermal Upgrade Kit Installation Procedures
4
Rack Space Requirements
Rack Space
9 RUs
4 RUs
Cisco 6120
Siecor POTS splitter
2
2 RUs
the OC-3c network interface module.
Height
1
15.75 in. (40.00 cm)
7 in. (17.78 cm)
3.5 in. (8.89 cm)
Depth
12 in. (30.48 cm)
12 in. (30.48 cm)
12 in. (30.48 cm)
Calculation
78-10158-01
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