10/100BaseT over E3/T3 Fiber Optic Modems

RAD's FOM-E3/ETH 10/100BaseT over E3 fiber optic modem converts a 10/100BaseT signal to E3 optical signal. The FOM-T3/ETH 10/100BaseT over T3 fiber optic modem converts a 10/100BaseT signal to T3 optical signal. The converted signals are then transmitted over fiber optic cable. These modems transparently connect 10/100BaseT links, utilizing the full E3/T3 bandwidth, without the heavy overhead associated with packet- or cell-based technologies. Forwarding and filtering are at Fast Ethernet rates.

• Extends the range of 10/100BaseT signals over E3/T3 services via fiber optic cable to ranges of 110 kilometers (68 miles) modes

• Built in bridge and VLAN support

• Filtering and forwarding at Fast Ethernet rates

• Plug and play operation

• Wave Division Multiplexing (WDM) for transmission of multiple signals over a single fiber optic link; reduced costs for fiber optic lines

The FOM-E3/ETH and FOM-T3/ETH fiber optic modems convert a 10/100BaseT electrical signal into an optical signal with a range of up to 110 km (68 miles). These modems transparently connect between LANs, achieving maximum bandwidth utilization of the E3/T3 link, without the heavy overhead associated with packet- or cell-based technologies. They provide built-in bridging and VLAN support at Ethernet/Fast Ethernet rates, enabling virtual connection of remote LANs (e.g., campus applications).

The Ethernet interface module performs frame filtering and forwarding at the Fast Ethernet maximum theoretical rate of 150,000 frames per second. The bridge causes no LAN delays.

Different optical interfaces are available:

- 850 nm for multimode fiber

- 1310 nm for single or multimode fiber

- 1310 nm and 1550 nm laser diode, long haul laser for extended range over single mode fiber

- WDM laser for transmission over a single fiber

The modems can be configured by the user to enable or prevent broadcast and IP multicasting to the WAN as required. The FOM-E3/ETH and FOM-T3/ETH can be used to connect LANs and high speed routers over E3/T3 links to the network.

The products are available as standalone units. They can be mounted in a standard 19" rack using special hardware or two units can be mounted side-by-side.