Cisco CISCO2650 - 2650 Router Hardware Installation Manual page 128

Channelized T1/E1 PRI Network Modules with G.703
Figure 7-1
modules with G.703.
Figure 7-1
NM-1CE1T1-PRI
Figure 7-2
NM-2CE1T1-PRI
Enabling Wetting Current on Channelized T1/E1 PRI Network Modules with
G.703
Wetting current is a small amount of electrical current (60 to 140 milliamps) sent from the central office
to the card to prevent the corrosion of electrical contacts in the module network connection.
The wetting current feature can be enabled or disabled by the end user. It is controlled by the location
of a jumper on the J8 (CTLR 0) and J9 (CTLR 1) connectors on the network module. (See
To enable the wetting current feature, connect pins 1 and 2 on the J8 and J9 connectors with the jumper.
To disable the wetting current feature, either remove the jumper completely, or use the jumper to connect
pins 2 and 3 on the J8 and J9 connectors.
The card is shipped with the jumper connecting pins 2 and 3 on the J8 and J9 connectors, disabling the
wetting current feature.
Cisco Network Modules Hardware Installation Guide
7-4
and Figure 7-2 show the faceplates for the 1-port and 2-port channelized T1/E1 PRI network
1-Port Channelized T1/E1 PRI Network Module with G.703
2-Port Channelized T1/E1 PRI Network Module with G.703
CD LP
T1
RA
E1-BAL
LA
E1-UNBAL
CTLR 1
Chapter 7
RX TX
MON MON
RA
C0 LA
RX
TX
MON MON
C1
RA
C0 LA
Connecting ISDN PRI Network Modules
CD LP
T1
AIM
E1-BAL
EN
E1-UNBAL
CTLR 0
CD
LP
T1
AIM
E1-BAL
EN
E1-UNBAL
CTLR 0
Figure
OL-2485-20
7-3.)