Cisco EF4116 Hardware Installation And Maintenance Manual page 42

Network Connection Considerations
Figure 2-20
(4 green)
(4 green)
(1 yellow,
1 green)
Two LED daughter cards are attached to the front of the dual serial module. (See Figure 2-21.)
Figure 2-21
Caution
edge. To prevent damage from stress or from ESD, do not exert force against the two LED daughter
cards, and do not touch the components on the cards.
Configuring the Dual Serial Module Interfaces
The dual serial network processor module contains two jumpers, J4 and J5 (see Figure 2-21), which
determine whether the ports are configured for nonreturn to zero (NRZ) or nonreturn to zero inverted
(NRZI). J4 configures serial port 0, and J5 configures serial port 1. The factory-configured (default)
jumper setting is for NRZ. To configure for NRZI mode on each port, the jumper must connect pins
1 and 2 of the respective jumper locations. (See Figure 2-22.) For NRZ (not NRZI), the jumpers that
connect pins 2 and 3 can be removed.
2-20 Cisco 4000 Series Hardware Installation and Maintenance
Dual Serial Network Processor Module Ports
DO
LEDs
TXC
DI
RXC
DCD
LEDs
RS
TS1
TS2
LEDs LP
DCE
P-0 P-1
Alignment
groove
Dual Serial Network Processor Module—Top View
LEDs
Indicates port 0
Indicates port 1
Hold the dual serial network processor module carefully by its handle or by the module's
SERIAL (V2)
50-Pin
serial ports
LED daughter cards
Serial
ports
Module handle
PORT-1
PORT-0
Alignment
groove
Mounting
screw location
J5 J4
Port 1 Port 0