Cisco VCO/4K Mechanical Assemblies page 83

NOTE 1
Jumper settings for JP1 and JP2 are as follows:
Pin 1 and 2
Pin 2 and 3
jumper removed Allows ring to float
The default jumper setting is pin 1 and 2.
Figure 18 shows the wiring plan for the BNC I/O module for Single Span E1 cards.
Figure 18: Wiring for BNC I/O Module (Single Span E1)
Ties ring to DC ground
Ties ring to AC ground
Span 1
.
TX1
.
RX1
P1
DIN
BNC I/O Module
I/O Modules 1-23