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4. Installation and Operation
To connect a G.703 Adapter or Balun Mate II to your
G.703 devices and/or networks, take these steps:
1. If you are using an MT255A-M Adapter, connect
its coaxial pigtails to your device's coaxial G.703
ports. If you are using an MT256A-F Adapter or
Balun Mate II, connect your coaxial G.703 cables
to its coaxial ports. Make sure to connect TX to
TX and RX to RX. If the cables or device ports you
want to attach have regular BNC connectors
rather than 1.6/5.6-mm connectors, you'll need to
use BNC-to-1.5/6.5-mm adapters or adapter cables
(call Black Box Technical Support).
2. Connect your G.703 twisted-pair cabling to the
Adapter's or Balun Mate II's RJ-45 jack(s). The
plug of each cable you'll attach to these jacks
should be pinned to match them:
1
6
1
8
RJ-45 jack
(female)
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CHAPTER 4: Installation and Operation
Pin 1: Transmit Data + (TX+)
Pin 2: Transmit Data – (TX–)
Pin 3: Transmit Data (TX) shield
Pin 4: Receive Data + (RX+)
Pin 5: Receive Data – (RX–)
Pin 6: Receive Data (RX) shield
Pins 7 and 8: No connection
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