Chapter 5: Installation
Installing the copper Cat5e Ethernet interface
Page 5-11
Hoist and fix the main drop cable
Warning
Failure to obey the following precautions may result in injury or death:
•
Use the hoisting grip to hoist one cable only. Attempting to hoist more than one
cable may cause the hoisting grip to break or the cables to fall.
•
Do not use the hoisting grip for lowering cable unless the clamp is securely in place.
•
Maintain tension on the hoisting grip during hoisting. Loss of tension can cause
dangerous movement of the cable and result in injury or death to personnel.
•
Do not release tension on the grip until after the grip handle has been fastened to the
supporting structure.
•
Do not apply any strain to the RJ45 connectors.
Caution
Do not lay the drop cable alongside a lightning air terminal.
1 Hoist the top end of the main drop cable up to the ODU, following the hoist manufacturer’s
instructions. When the cable is in position, fasten the grip handle to the supporting structure
and remove the hoist line.
2 Connect the main drop cable to the ODU.
3 Attach the main drop cable to the supporting structure using site approved methods.
Ground the main drop cable
At all required grounding points, connect the screen of the main drop cable to the metal of the
supporting structure using the cable grounding kit (Cambium part number 01010419001).
Test resistance in the drop cable
Test that the resistances between pins are within the correct limits, as specified in the table
below. If any of the tests fail, examine the drop cable for wiring faults.
Connection to a terminated cable can be achieved reliably by use of a suitable cable adaptor.
One example is the Modapt adaptor manufactured by The Siemon Company.
Cable length
Maximum Resistance (Ohm)
between RJ45 pins
Ft
m
1
&
2, 3
&
6,
4
&
5, 7
&
8
1
&
3
4
&
7
0
0
0.8
1
1.6
33
10
2.5
2.7
3.3
66
20
4.2
4.4
5
