Patton electronic 1180/35 Installation, Single Fiber Connection, 4.2 V.35 CONNECTION, Operation

4.0 INSTALLATION

The Model 1180/35 is easy to install. After configuring the DIP switches, simply connect the single fiber cable, hook up the V.35 interface, and plug the power supply adapter into the 1180/35. Figure 4 (below) shows the location of the interface connections on the Model 1180/35 rear panel.

Figure 4. Rear Panel of Model 1180/35 Showing Interface Connections

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

1.5or 3 miles long. The fiber cable connects to each Model 1180/35 using either an ST or an SMA connector. Figure 5 (below) shows a close-up of both connector types.

alignment pin faces down

Figure 5. Close-up of ST and SMA Connections

4.2 V.35 CONNECTION

The Model 1180/35 is configured as a DCE. Therefore it “wants” to DTE hardware such as a PC, host or terminal, using a straight through V.35 cable. Connecting the Model 1180/35 to DCE hardware such as a modem, multiplexer, or printer, requires a null modem V.35 cable. Contact Patton Technical Support at (301) 975-1007 for more information about constructing the appropriate null modem cable for your application.

5.0 OPERATION

Once you have configured each Model 1180/35 properly and connected the fiber and V.35 cables, you are ready to operate the units. This section describes reading the LED status monitors, power-up, and using the built-in loopback test modes.

5.1 LED STATUS MONITORS

The Model 1180/35 features six front panel status LEDs that indicate the condition of the modem and communication link. Figure 6 (below) shows the front panel location of each LED.

Figure 6. Front view of Model 1180/35

•The green "Power" LED glows if power is applied to the modem.

•The green "Test Modes" LED indicates that the modem is in a test mode (local analog or remote digital).

•The "TD" and "RD" indicators blink red and green with data activity. Red indicates a low V.35 logic level, green indicates a high V.35 logic level. Note: V.35 devices idle in a low state, so the LED will glow red if the connections are correct and the V.35 device is in an idle state.

•The "RTS" and "CD" indicators are also tri-state and will glow red for a "low" signal or green for a "high" signal. RTS lights for an incoming signal on V.35 pin C. CD lights for an incoming signal on the line side, and the resulting output signal on V.35 pin F.

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