E1-75/120 Impedance Conversion Panel Specifications - Cisco ONS 15454 SDH E1-75 Installing

You can install the E1-75/120 conversion panel in the ANSI or ETSI rack containing the
ONS 15454 SDH shelf or in a nearby rack. If you install the E1-75/120 conversion panel where a longer
cable is required, make sure that the total cable loss of the balanced 120-ohm cable and the unbalanced
75-ohm cable does not exceed the maximum allowed value. The E1-75/120 conversion panel enables the
use of 75-ohm interfaces on the client side with the E1-42 card that has 120-ohm interfaces.
Before you can install the E1-75/120 in the rack, install the type of rackmount brackets that is required
for the rack that you are using.
rackmount bracket. To install the E1-75 in a 23-inch rack, use the 19-inch/23-inch rackmount brackets
perpendicularly.
Figure 3
Figure 3
Symmetrical Signals

E1-75/120 Impedance Conversion Panel Specifications

The E1-75/120 conversion panel has the following specifications:
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78-15140-01
shows a block diagram of the E1-75/120 conversion panel.
E1-75/120 Conversion Panel Block Diagram
42 Channels
Transformer 1.26:1
120-Ohm
Unsymmetrical Signals
Transformer 1.26:1
42 Channels
E1-75/120 input
Bit rate: 2.048 Mbps +/− 50 ppm
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Line code: HDB-3
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E1-75/120 output
Bit rate: 2.048 Mbps +/− 50 ppm
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Line code: HDB-3
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E1-75/120 electrical interface
Figure 2 shows an ETSI rackmount bracket and a 19-inch/23-inch
75-Ohm
Installing the Cisco ONS 15454 SDH E1-75/120 Impedance Conversion Panel
E1-75/120 Impedance Conversion Panel Description
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