4-7
Front Panel Display Controls and Connectors paragraph  3.3.  
Table  4-2 CMU Diagnostic Led Display describes the functions of the diagnostic LEDs 
when set to the CPU Module (i.e., the “CPU” led in the top row is on). 
Table  4-2 CMU Diagnostic Led Display 
LED No.  Description 
10    Port 2 Transmission or Reception 
11    Port 2 Transmission or Reception 
12    Port 2 Transmission or Reception 
14    Port 3 Transmission or Reception 
15    Port 3 Transmission or Reception 
16    Port 3 Transmission or Reception 
 
4.1.5  CMU Unit Field Replaceable Parts 
Table  4-3 CMU Unit Field Replaceable Parts 
Part No.  Description 
FLN2880  CMU Unit 
3108509G16  User Connector Plug 3-Pin 
6502069C06  Fuse 1Amp 250V SB 5 x 20 mm 
5486773J01  CMU Label 
GLN7306  Rubber Sealing Plug RJ45 Connector 
FKN4869  Power Cable for CMU 
0984181L01  2 Pin Plastic Jumper Header 
FKN1648  Communication Cable Kit