user manual

3-26
Cisco ONS 15454 SDH Reference Manual, R5.0
April 2008
Chapter 3 Electrical Cards
3.13 E1-75/120 Impedance Conversion Panel
3.13 E1-75/120 Impedance Conversion Panel
The ONS 15454 SDH E1-75/120 impedance conversion panel provides front mount electrical
connection for 42 ITU-compliant, G.703 E-1 ports. With the E1-75/120 conversion panel, each
E1-42 port operates at 2.048 Mbps over a 75-ohm unbalanced coaxial 1.0/2.3 miniature coax connector.
Figure 3-12 shows the E1-75/120 faceplate.
Caution This interface can only be connected to SELV circuits. The interface is not intended for connection to
any Australian telecommunications network without the written consent of the network manager.
Figure 3-12 E1-75/120 Impedance Conversion Panel Faceplate
21 TX 22 N 45 RX 22 N 69 NC 93 NC
22 TX 22 P 46 RX 22 P 70 NC 94 NC
23 NC 47 NC 71 NC 95 NC
24 NC 48 NC 72 NC 96 NC
Table 3-15 E-1 Interface Pinouts on Ports 22 to 42 (continued)
Pin No.
Signal
Name Pin No.
Signal
Name Pin No.
Signal
Name Pin No.
Signal
Name
83635
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 22 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42