11
4.3 CONNECTING THE FIBER INTERFACE
The Model 1193RC is designed to be connected to another Model
1193RC or 1193. The Model 1193RC supports communication
between G.703/G.704 equipment over Single-mode fiber at distances
up to 50 km (31 miles). One modem can connect to another on the
end of a single string of fiber optic cable.
To connect two Model 1193RCs, use one strand of 9/125 micron
Single-mode fiber. The fiber connects to each Model 1193RC using
either an FC or SC connector.
Figure 9 below shows a close-up of FC and SC connector types.
12
Figure 9. Single-mode fiber connectors (FC and SC)
WARNING: Model 1193RC uses a Laser Diode to transmit invisible light into the fiber.
Exposing eyes to this light can cause permanent damage. To prevent eye damage, DO NOT
DIRECT DISCONNECTED FIBER OR FIBER CONNECTOR OF THE MODEM IN THE
DIRECTION OF THE EYES.
4.2 CONNECTING TO 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 manual.
4.2.1 Connecting theTwisted Pair (120 Ohm) to G.703/G.704 Network
The rear interface card for the Model 1193RC 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 Connecting the Coax Cable to the G.703/G.704 Network
The rear interface card for the Model 1193RC 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 terminates
via dual coaxial cable, use the diagram below to make the proper con-
nections. 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: Connecting fiber cable to G.703/G.704 Interface
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
