PLATFORM INSTALLATION3-18 Edition One XC1000 ServiceFor proper operation of telephone signaling circuits andequipment, the –48 Vdc return must be strapped to thecentral office main-ground bus (earth-ground reference).This strap is usually installed close to the power source ordistribution panel.Caution!Do not install any circuit fuses or turn on any circuitbreakers at this time. Fuses are installed and circuitbreakers turned on after all cabling is completed, as part ofthe startup procedure, described in section 4.3.Warning!3. Connect the two input-power wires (return and –48 Vdc) to the cabinet 1main-power-input terminal block on the power-distribution shelf. Referto Figure 3-7 and use one of the following methods: Discard the compression lugs. Crimp a 5/ 16–18 by 1 1/ 8-inchring lug to each power wire. Bolt the lugs to the input terminals. Strip the end of each power wire and insert the cables into thecompression lugs attached to the terminal block. Tighten thescrews.4. Connect the –48 Vdc supply lead to the negative (–) terminal, and thereturn lead to the positive (+) terminal.5. Connect the other end of the input-power wires to the proper terminalsat the power source or distribution panel in the central office. Observethe correct polarities when connecting these wires.Measure the power and ground to verify that the power wires areinstalled correctly. To check the power and ground, refer to section 5.6.3.7 CONNECTING TELEPHONE CABLESProcedures for connecting the telephone cables to the backplane connectorsare presented in sections 3.7.1 through 3.7.4. Dress cables according to thecabinet location and configuration and drop them to the connectors. (Eachcable connector should have had its TIC number written on it during the sitepreparation.)3.7.1 ATIC or a DID TIC Telephone ConnectionsThe ATIC or DID TIC telephone cables and connectors should have beenassembled and cut to the correct length during the site preparation, describedin section 2.6.3. Install the cables using the following steps and Figure 3-8 asa reference:SECTION 3.6 – 3.7
