Specifications

Figure 17: Configuring the Repeater
Fiber-Optic Modems
You can install the 2110 fiber-optic modems in any location on the FC bus. Just as only two repeaters can be
cascaded on the FC bus, only two pairs of 2110 modems can be cascaded.
The first installation step is to route the optical fiber and connect each modem to the ends of the fiber. The second
step is to connect the FC bus on both sides of the modems.
Routing and Connecting the Fiber Cables
To route and connect the fiber cables, follow these steps and see Figure 18:
1. Route the optical fiber in a manner that is required for the application.
2. Connect the fiber cable from the T (Transmit) output of the modem nearest to the NxE to the R (Receive) input
of the modem near the MS/TP devices.
3. Connect the fiber cable from the T (Transmit) output of the modem near the MS/TP devices to the R (Receive)
input on the modem nearest to the NxE.
4. Plug in the power supply for each modem.
Figure 18: Connecting the 2110 Modems
Connecting Modems to MSTP Bus
Connect the MS/TP bus to the 2110 modem by soldering the MS/TP wires to pins on the 9-pin connector, which
can also configure the modem as an EOL device. To connect the bus, see Setting Termination on Fiber Modems.
41MS/TP Communications Bus Technical Bulletin: Appendix: FC Bus Auxiliary Devices