Operation Manual

Fiber Distributed Antenna System (Fiber DAS)
111
Local Connection to Remote Unit with Two FOR's
Some remote units are built with 2 FOR boards. This would occur in applications where one chassis contains: MIMO
paths, multiple amplifiers of the same band, amplifiers fed from different FOI cards or other special applications.
The 2 FOR boards share the one Ethernet connector on the remote unit. A standard Ethernet cable will only access
FOR [0]. A custom cable is required to access FOR [1] board.
To build a cable to access both FOR units you will need the following items.
 Wire cutters
 Wire strippers
 Electrical tape
 Two Ethernet cables with RJ-45 Connectors
Build a Custom Cable
1. Cut both Ethernet cables in half.
Three sections will be needed.
2. Strip back the insulation on each wire about 0.5 inch/13mm.
3. Twist the color pairs together as shown in Figure 134 on page 112 .
4. Use electrical tape to cover the connections so bare wire do not touch.
Unused cable strands can be cut.
5. Secure the splice with electrical tape so that stress does not pull the wire pairs apart.
6. Clearly mark each connector to distinguish which connector is attached to the remote and which connector
plugs into the laptop for FOR [0] and FOR [1].