4.2 CONNECT THE G.703/G.704 NETWORK
There are two ways to connect to the G.703/G.704 Network. This
section describes both options. After selecting the appropriate connec-
tion, set the internal jumpers as described in section 3.2 of this manu-
al.
4.2.1 Connect Twisted Pair (120 Ohm) to G.703/G.704 Network
The rear interface card for the Model 1186RC is equipped with a
single RJ-48C jack option for connections to a G.703/G.704 Network. If
your G.703/G.704 Network terminates via an RJ-48C, use the diagram
below (Figure 7).
4.2.2
Connect Coax Cable to the G.703/G.704 Network
The rear interface card for the Model 1186RC is also equipped
with dual female BNCs (TX and RX) for connection to a 75 ohm dual
coax G.703/G.704 Network interface. If your G.703/G.704 Network ter-
minates via dual coaxial cable, use the diagram below to make the
proper connections. The connector pinout and signals are shown in
Figure 8, below.
RX
(Data
FROM
G.703/G.704
Network)
TX
(Data
TO
G.703/G.704
Network)
Network
Figure 8.
Fiber cable to G.703/G.704 Interface connection
Figure 7.
G.703/G.704 Network Interface.
1 RX Data (TIP)
2 RX Data (RING)
3 (no connection)
4 TX Data (TIP)
5 TX Data (RING)
6 (no connection)
7 (no connection)
8 (no connection)
1
2
3
4
5
6
7
8
}
}
From Network
To Network
4.3 CONNECT THE FIBER INTERFACE
The Model 1186RC is designed to be connected to another Model
1186RC or Model 1186. The Model 1186RC supports communication
between G.703/G.704 equipment over one string of multi-mode fiber at
distances up to 2.5 km (1.5 miles). One modem can connect to anoth-
er on the end of a single string of fiber optic cable.
To connect two Model 1186RCs, use one string of 62.5/125
micron multi-mode fiber. The fiber connects to the rear interface card
using either an ST or an SMA connector.
Figure 9 below shows a close-up of both connector types.
Figure 9:
Close up of ST and SMA connectors
12
11
Alignment pin
faces down
