Cisco Cisco ONS 15454 SDH Multiservice Provisioning Platform (MSPP) 安装指南

120-ohm side. Each of the 96-pin Molex type connectors connects 21 inputs and 21 outputs. 
Transformers in the E1-75/120 conversion panel improve decoupling from DC voltages and 
overvoltages. The E1-75/120 conversion panel is intended to be used in DDFs (digital distribution 
frames), ETSI racks, and ANSI racks. If you want to use the E1-75/120 conversion panel in a rack other 
than ETSI, remove the ETSI rackmount brackets shipped with the E1-75/120 and use the optional 
19-inch/23-inch mounting bracket. 

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 coaxial connector.  

 shows the E1-75/120 faceplate.

 shows the E1-75/120 with optional rackmount brackets installed.

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. 

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19 to 23 in. 
rackmount
bracket

ETSI
rackmount
bracket