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When using the 75 Ohm interface, jumper straps JP2, JP6, and JP7
must be installed over the jumpers. The jumpers are located next to the
BNC connectors. Refer to the following section to open the case.
Opening the Case
Open the case by inserting a screwdriver into the slots and twist the
screwdriver head slightly. The top half of the case will separate from the
lower half of the case. Take caution not to damage any of the PC board
mounted components.
Connecting the Twisted Pair (120 ohm) to the G.703 Network
The Model 2701/I is equipped with a single RJ-48C jack for connections
to a 120 ohm twisted pair G.703/G.704 network interface. If your G.703/
G.704 network terminates via RJ-48C, use the connection diagram
(Figure 7) following the pinout and signals chart below to connect the
120 ohm G.703/G.704 network channel.
Figure 7. G.703/G.704 170 ohm Connection.
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
(RX) Receive (Ring)
(RX) Receive (Tip)
Shield
(TX) Transmit (Ring)
(TX) Transmit (Tip)
Shield
No connection
No connection
Signal NameRJ-48C Jack