Cisco CISCO1602-CH Hardware Installation Guide - Page 93
Enabling Wetting Current on T1/FT1 DSU/CSU WICs
UPC - 746320009230
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DSU/CSU WAN Interface Cards T1/FT1 DSU/CSU WAN Interface Card Table 13 Feature AL LED CD LED Loopback button T1/FT1 DSU/CSU WIC LEDs and Loopback Button (continued) Color Yellow Off Green - Description Remote station has an alarm condition. Normal operation. Internal DSU/CSU in the WIC is communicating with another DSU/CSU. This LED is on during normal operation. Push this button to place the WIC into loopback mode. The service provider can send a signal to test the connection from your site to the central office switch. Push this button again to turn off loopback mode. Enabling Wetting Current on T1/FT1 DSU/CSU WICs The WIC-1DSU-T1-V2 interface card supports wetting current. 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 card's network connection. Wetting current may be enabled or disabled by the user. It is controlled by the placement of a jumper on connector J2 on the card. Figure 60 shows the J2 connector and the jumper. The feature is enabled by connecting pins 1 and 2 of the J2 connector with a jumper. It is disabled either by removing the jumper or by connecting pins 2 and 3 of the J2 connector. The card is shipped with the jumper connecting pins 2 and 3 on the J2 connector, which disables the wetting current. OL-12845-01 5