16-5
Cisco Network Modules Hardware Installation Guide
OL-2485-20
Chapter 16 Connecting High-Density Analog Telephony Network Modules
Adding Port Expansion Modules
Note
Be sure to press firmly on the port expansion module until the board seats securely on the
connector.
Caution
For each expansion module, two mounting screws must be installed with 6-8 lbs-in (67.8 N-cm) of
torque. Failure to properly secure the expansion module to the base module with two screws
compromises product reliability.
In the case of FXO ports, failure to properly tighten both mounting
screws causes FXO ground-start outgoing call operation to fail
.
Step 3
Insert the screws from the hardware kit through the port expansion module into the brackets on the
network module.
Warning
Failure to secure the expansion module to the base module with two screws defeats the earth ground,
causing a potential safety hazard.
Statement 347
Figure 16-4 Installing a Port Expansion Module
Step 4
Apply the appropriate label on the front of the card, as shown in
Figure 16-5
.
Step 5
Install the network module into the router, as described in the
“Installing Cisco Network Modules in
Cisco Access Routers” section on page 2-5
.
NM
-
HD
A
1
25
AC
T
26
50
EN
Port
1-
4
5-
14
15-
24
#
Type
4
FXS
62295
EM 1 installed
on this side
EM 0 installed
on this side