Sync/Async Fiber Optic Modem

RAD's FOM-20 sync/async fiber optic modem operates full or half duplex over fiber optic cable. The FOM-20 sync/async fiber optic modem provides a secure, long range data fibers link between computers, routers, multiplexers, and other data communication devices. It operates at 16 selectable synchronous or asynchronous data rates from 19.2 kbps to 256 kbps. The built-in Ethernet option enables cost-effective LAN-to-LAN connectivity without the need for an external bridge. The FOM-20 sync/async fiber optic modem operates with various grades of fiber optic cable and supports a variety of data and fiber optic interfaces.

•  Extended transmission range up to 140 km (87 miles) over fiber

•  Ideal for operations in “noisy environments” or where security is an issue

•  Immunity against electrical interference; sparking and lightening protection

The FOM-20 is a sync/async fiber optic modem operating full or half duplex over fiber optic cable. It has 16 selectable data rates from 19.2 kbps up to 256 kbps. Four rates are for asynchronous transmission and 11 rates are for synchronous transmission (19.2 kbps is for both sync and async).

The FOM-20 can operate over single mode or multimode fiber using 850 nm or 1310 nm LEDs and 1310 nm or 1550 nm laser diodes.

The main application for the FOM-20 is point-to-point fiber links at ranges longer than any copper modem can achieve, in noisy environments or when security is a primary concern.

The FOM-20 features V.54 diagnostics to perform local analog/digital and remote digital loopbacks. Loopback commands are controlled either by a manual switch or via the DTE interface signals. The FOM-20 includes a built-in BER tester which is activated by a front panel switch and generates a 511 pseudo-random test pattern according to the V.52 standard.

The FOM-20 is available as a standalone unit or as a card for the ASM-MN-214 19" rack. An optional kit is available for mounting one or two standalone units in a 19" rack.