User Manual

AS4000 Central Terminal
Installation and Commissioning
DLP 003
605-0000-452
Issue 1.3dr Date 7/02/00
Page 7 of 8
120 Ohm Connections
Run the 2Mbit/s 120 ohm cables from the modem shelf to the allocated positions on the
DDF/Backhaul. In partial equipped installations it may be appropriate to run enough
cables to cater for a complete rack of equipment. This reduces the need to disturb
original installation when adding additional equipment.
Feed the 2Mbit/s cables through the top left-hand side of the rack, and down the front
of the rack.
Identify and label each cable at both ends as well as the DDF/Backhaul positions.
Terminate all cables with 9 pin D-Type connectors. Terminate as detailed in Figure 12.
9 Way Female D-Type
2
9
4
1
5
E5 in
E5 out
Screen
A
B
Screen
A
B
6
Figure 12. 120 ohm connection to CT modem shelf.
Connect the 2Mbit/s ports on the DDF to P7 connectors on shelf interface connections
located on the modem shelf interface panel. If using protected mode connect the other
2Mbit/s cables to P9 connectors on the same panel. See Figure 11
Ensure that the respective 2Mbit/s ports have been configured on the DDF/Backhaul
Tie in cables as necessary using suitable cable ties, trim, leaving no sharp edges.