Installation guide

4-70 Cisco 4000 Series Installation Guide
Network Connection Considerations
Figure 4-22 Dual Serial Network Processor Module—Top View
Caution
Hold the dual serial network processor module carefully by its handle or by the
module’s 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 4-22), 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 4-23.) For NRZ (not NRZI), the jumpers that connect pins 2 and 3
can be removed.
LED daughter cards
Serial
ports
H1036a
Module handle
Mounting
screw location
LEDs
Port 1
Port 0
J5
J4
Indicates port 0
Indicates port 1