Async Fiber Optic Multipoint Modem

RAD's FOM-6MP Async fiber optic multipoint modem operates over fiber to connect remote terminals and computers, connected in multidrop, to a central host. Transmission range is dependent only on the type of fiber used.

• Variety of optical options, including: multimode, single mode and laser diode for extended range make the unit suitable for any application

 

The FOM-6MP async fiber optic modem operates over fiber to connect remote terminals and computers, connected in multidrop, to a central host. Transmission range (regardless of the data rate):

- 3.5 km (2 miles) using 850 nm multimode fiber

- 30 km (18 miles) using 1310 nm single mode fiber

- 46 km (28 miles) using 1310 nm laser diode single mode fiber

 

The FOM-6MP contains two optical interfaces and one V.24/RS-232 port. One optical interface passes data to and from the host while the other passes data to and from the rest of the terminals in the chain. The V.24/RS-232 interface is connected to the local terminal.

 

Terminal contention for transmission to the host is selectable: transmitting data or raising RTS signal.

 

The FOM-6MP includes anti-streaming protection which prevents blockage of data transmission. The FOM-6MP disables a port that blocks the polling for a preset, user-selectable period of time.

 

LED indicators help the user to easily isolate faulty segments along the chain of terminals. The FOM-6MP requires an external DC power supply of 10–30 VDC/500 mA.