Cisco Cisco ONS 15454 SDH Multiservice Provisioning Platform (MSPP) 安装指南
3
Installing the Cisco ONS 15454 SDH E1-75/120 Impedance Conversion Panel
78-15140-01
E1-75/120 Impedance Conversion Panel Description
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.
for the rack that you are using.
shows an ETSI rackmount bracket and a 19-inch/23-inch
rackmount bracket. To install the E1-75 in a 23-inch rack, use the 19-inch/23-inch rackmount brackets
perpendicularly.
perpendicularly.
shows a block diagram of the E1-75/120 conversion panel.
Figure 3
E1-75/120 Conversion Panel Block Diagram
E1-75/120 Impedance Conversion Panel Specifications
The E1-75/120 conversion panel has the following specifications:
•
E1-75/120 input
–
Bit rate: 2.048 Mbps
+/ − 50 ppm
–
Line code: HDB-3
•
E1-75/120 output
–
Bit rate: 2.048 Mbps
+/ − 50 ppm
–
Line code: HDB-3
•
E1-75/120 electrical interface
–
Connectors:
1.0/2.3 miniature coax connectors on 75-ohm side
Molex 96-pin LFH connectors on 120-ohm side (21 inputs and 21 outputs per connector)
1.0/2.3 miniature coax connectors on 75-ohm side
Molex 96-pin LFH connectors on 120-ohm side (21 inputs and 21 outputs per connector)
–
Impedance tolerance:
+/ − 5%
42 Channels
120-Ohm
Symmetrical Signals
75-Ohm
Unsymmetrical Signals
Transformer 1.26:1
83637
42 Channels
Transformer 1.26:1