Cisco 3825 Hardware Installation Guide - Page 128

Channelized T1/E1 PRI Network Modules with G.703 Chapter 7 Connecting ISDN PRI Network Modules Figure 7-1 and Figure 7-2 show the faceplates for the 1-port and 2-port channelized T1/E1 PRI network modules with G.703. Figure 7-1 1-Port Channelized T1/E1 PRI Network Module with G.703 NM-1CE1T1-PRI RX MON TX MON C0 CD LP T1 RA E1-BAL LA E1-UNBAL CTLR 0 AIM EN 82886 Figure 7-2 2-Port Channelized T1/E1 PRI Network Module with G.703 NM-2CE1T1-PRI CD LP T1 RA E1-BAL LA E1-UNBAL CTLR 1 RX MON TX MON C1 C0 CD LP T1 RA E1-BAL LA E1-UNBAL CTLR 0 AIM EN 82887 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 Figure 7-3.) 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 OL-2485-20