NPT-1020 Installation and Maintenance Manual
NPT-1020 Wall-Mounted Installations
ECI Telecom Ltd. Proprietary
5-41
5.18.4
Routing and Connecting Electrical Traffic Cables
Multipair cables are used to connect the balanced E1 (2 Mbps) interfaces located on the NPT-1020 or on E1
modules installed in it.
Each cable consists of a total of 21 E1 twisted pairs per cable (transmit or receive). The cable end
connecting to the NPT-1020 or to the E1 module is terminated with an appropriate male connector.
To connect multipair cables:
1.
Bring the cable connector against the appropriate slot and connect the cable connector to the
corresponding module.
2.
Secure the connector to the module connector with the two cable connector screws. Tighten the
screws manually. If the screws cannot be reached with your bare hand, use an adjustable-torque
flatblade screwdriver.
3.
Bend the cable and thread it through the space above the NPT-1020 and the left side of the frame.
Use cable ties as required to fasten the cable to the frame cable supports. See the figure
Wall-mounted frame cable routing - left side view
4.
Use a cabling diagram of the frame (or site) to associate module connectors with the appropriate DDF
connections. Cut excess cable length if necessary.
5.
If a DDF is installed in the frame, refer to
Wiring the E1 Cables to the DDF
to the DDF wiring blocks.
5.18.5
Routing and Connecting Coaxial Cables
Individual coaxial cables are used to connect to the interfaces located on E3/DS-3 and electrical STM-1
modules.
As part of site preparations, suitable cables must be routed from the relevant High Rate DDF (if used) to the
intended frame location and connected to the coaxial cables with DIN 1.0/2.3 connectors. Leave sufficient
length to permit routing the cables to the appropriate level in the frame.
To connect coaxial traffic cables to E3/DS-3 or STM-1 modules:
1.
Pull each coaxial cable to the level of the corresponding electrical connection module.
2.
Connect the DIN 1.0/2.3 connector on the cable to the corresponding electrical connector on the
module.
3.
Based on the frame (or site) cabling diagram, arrange the coaxial cables in groups according to the
designated module, and route them along the left side of the frame.
4.
Bend the cables and thread them through the space above the NPT-1020 and the left side of the
frame. Use cable ties as required to fasten the cables to the frame cable supports. See the figure
Wall-mounted frame cable routing - left side view
5.
Cut excess cable length if necessary.