Hardware Installation Guide
Page 93
... Yellow Off Green - Normal operation. Push this button again to place the WIC into loopback mode. It is enabled by the user. The card is controlled by connecting pins 2 and 3 of a jumper on connector J2 on T1/FT1 DSU/CSU WICs The WIC-1DSU-T1-V2 interface card supports wetting current.... It is shipped with a jumper. Push this button to turn off loopback mode. Figure 60 shows the J2 connector and the jumper. Description Remote station has an alarm condition.
... Yellow Off Green - Normal operation. Push this button again to place the WIC into loopback mode. It is enabled by the user. The card is controlled by connecting pins 2 and 3 of a jumper on connector J2 on T1/FT1 DSU/CSU WICs The WIC-1DSU-T1-V2 interface card supports wetting current.... It is shipped with a jumper. Push this button to turn off loopback mode. Figure 60 shows the J2 connector and the jumper. Description Remote station has an alarm condition.