4.0 INSTALLATION
The Model 1180 is easy to install. After configuring the DIP
switches, simply connect the single fiber cable, hook up the RS-232
interface, and plug the power supply adapter into the 1180. Figure 4
shows the location of the interface connections on the Model 1180 rear
panel.
4.1 SINGLE FIBER CONNECTION
These short range modems are designed to work in
pairs. You will
need one at each end of single multi-mode fiber cable. Depending
upon the data rate setting you select, your cable may be a maximum of
2.5 or 5 Km long. The fiber cable connects to each Model 1180 using
either an ST or an SMA connector. Figure 5 shows a close up of both
connector types.
4.2 RS-232 CONNECTION
The Model 1180 is configured as a DCE. Therefore it wants to
connect to a DTE. When connecting the Model 1180 to DTE hardware
such as a PC, host or terminal, use a
straight through RS-232 cable.
When connecting the Model 1180 to DCE hardware such as a modem,
multiplexer or printer, use a
null modem RS-232 cable. The diagrams
below show some typical RS-232 null modem wiring configurations.
Consult your hardware user manual for the specific pin configuration
you need.
8
7
Figure 4. Rear panel of Model 1180 showing interface connections
Powered Short Range Modem
Made In The USA
Fiber
RS-232 Interface
Power
Model 1180 Single-Fiber Modem
Power
- Remote
- Normal
- Local
Test
Modes
TD
RD
RTS
CD
Figure 5. Close up of ST and SMA connections
ST
SMA
alignment pin
faces down
Local Software Handshaking
RS-232 DCE
Model 1180
DB-25 Pin No.
DB-25 Pin No.
1 ---------------------------------------------------1
2 ---------------------------------------------------3
3 ---------------------------------------------------2
4
4
5
5
6
6
8
8
20
20
7 ---------------------------------------------------7
Local Hardware Handshaking
RS-232 DCE
Model 1180
DB-25 Pin No.
DB-25 Pin No.
1 ---------------------------------------------------1
2 ---------------------------------------------------3
3 ---------------------------------------------------2
4 ---------------------------------------------------5
5 ---------------------------------------------------4
6 ---------------------------------------------------20
8
20 ---------------------------------------------------6
8
7 ---------------------------------------------------7