Eci Telecom NPT-1020 Installation And Maintenance Manual page 85

NPT-1020 Installation and Maintenance Manual
To connect the multipair cable to the E1 interfaces on the NPT-1020:
1. Arrange the E1 traffic cable and route it to the rack side rails.
2. Pull the E1 cable down to the level of the NPT-1020 platform.
3. Bend the cable and thread it through the side cable guides of the rack and through the appropriate
opening near the platform until the cable connector is positioned against the appropriate place. Use
cable ties as required to fasten the cable to the rack side rails.
4. Use a cabling diagram of the site to associate the NPT-1020's E1 connector with the appropriate DDF
connections.
5. Connect the cable connector to the corresponding connector on the NPT-1020 front panel.
4.9.4.3 Routing and Connecting E1 Cables for Unbalanced E1 Interfaces
The PME1_21 can only provide balanced E1s directly. For unbalanced E1s, the xDDF-21 patch panels must
be installed with the NPT-1020. Each xDDF-21 provides balanced-to-unbalanced conversion for 21 E1s.
The cable between the PME1_21 and the xDDF-21 (supplied by ECI) consists of 21 E1 twisted pairs (transmit
and receive) supporting 21 balanced E1s. The cable end connecting to the PME1_21 is terminated with a
100-pin SCSI male connector. The cable end connecting to the xDDF-21 is terminated with two 50-pin SCSI
male connectors.
To connect E1 cables between the NPT-1020 and the xDDF-21:
1. Arrange the E1 traffic cables and route them to the rack side rails.
2. Pull the 100-pin SCSI end of the cable down to the level of the NPT-1020 platform.
3. Bend the cable and thread it through the side cable guides of the rack and through the appropriate
opening near the platform until the cable connector is positioned against the appropriate place. Use
cable ties as required to fasten the cable to the rack side rails.
4. Connect the cable connector to the E1 connectors on the front panel of the PME1_21 module.
5. Secure the cable connector to the PME1_21 connectors with two cable connector screws. Tighten the
screws manually. If you cannot reach the screws with your hands, use an adjustable-torque flatblade
screwdriver (maximum blade size 0.6). Set the tightening torque to 40 N cm to 44 N cm.
6. Pull the 2 x 50-pin SCSI end of the cable to the level of the xDDF-21.
7. Bend the cables and thread them through the side cable guides of the rack and through the
appropriate opening near the platform until the cable connector is positioned against the appropriate
place. Use cable ties as required to fasten the cable to the rack side rails.
8. Connect the cable connector marked J1 to the 50-pin SCSI connector on the xDDF-21 panel marked
J1. Connect the cable connector marked J2 to the 50-pin SCSI connector on the xDDF-21 panel
marked J2.
9. Secure the cable connectors to the xDDF-21 connectors with two cable connector screws for each
connector. Tighten the screws manually. If you cannot reach the screws with your hands, use an
adjustable-torque flatblade screwdriver (maximum blade size 0.6). Set the tightening torque to 40 N
cm to 44 N cm.
ECI Telecom Ltd. Proprietary
Installing Equipment
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