4
4..0
0 IIN
NS
ST
TA
AL
LL
LA
AT
TIIO
ON
N
Once the Model 1088/K is properly configured, it is ready to con-
nect to the twisted pair interface, to the serial port, and to the power
source. This section describes how to make these connections.
4.1 CONNECT G.703 NETWORK
The Power, G.703/G.704 and DSL Line connections are located
on the rear panel of the Model 1088/K. Figure 4, below, shows the
location of each of these ports.
4.2 JUMPER CONFIGURATION
The Model 1088/K has four jumpers (two position headers): JP1,
JP4, JP5, and JP6. These jumpers are used to select input or output
impedance matching between the module, external line, and to employ
either BNC or RJ-45 interface. Figure 5 (below) shows the top view of
the printed circuit board (PCB) and the location of the jumpers.
13
The following is a description of the jumper settings with respect to
the rear panel connectors.
1. For a 75 Ohm connection (coax) insert JP1, JP4, JP5, and JP6
(default)
2. For a 120 Ohm connection (RJ45) remove JP1 and JP4, JP5, and
JP6.
4.2.1 Connect Twisted Pair (120 ohm) to G.703 Network
The Model 1088/K is equipped with a single RJ-48C jack for con-
nections 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 diagram
below and the table on the following page to make the proper connec-
tions. The connector pinout and signals are shown in Figure 6, below.
Use the following connection diagram to connect the 120 ohm
G.703/G.704 network channel.
RJ-45 Cable (8-Wire)
1088/K
G.703/G.704
SIGNAL
PIN#
NETWORK SIGNAL
RX+
1-----------------------TX+
RX-
2-----------------------TX-
TX+
5-----------------------RX+
TX-
4-----------------------RX
Shield
3-----------------------Shield
Shield
6-----------------------Shield
14
Figure 4.
Model 1088/K Rear Panel
Figure 6:
120 Ohm RJ-48C G.703 Interface
(No Connection) 8
(No Connection) 7
(No Connection) 6
(TX+) 5
(TX-) 4
(No Connection) 3
(RX-) 2
(RX+) 1
8
7
6
5
4
3
2
1
G.703/G.704 Terminations
DSL Line
Power
Figure 5
. Top view of 1088/K, location of JP1, JP4, JP5, and JP6
RX
TX
RX
TX
