The Full/Half-Duplex 10BASE-FL Transceiver provides low cost network migration options.

Features

Available in both multimode and single mode fiber optic versions.
Link Pass Through
Link Pass Through is a troubleshooting feature that allows the transceiver to monitor both the fiber and copper RX ports for loss of signal.
Single mode version supports segments up to 15,000 meters in length.
Both multimode and single mode transceivers connect AUI male (DB-15) nodes to a fiber optic medium via a standard ST type connector in both full and half-duplex modes. The ability to operate in full-duplex mode allows for operation between switches, routers and servers using full-duplex Ethernet.
Multimode version takes advantage of full duplex transmission to increase data rates between devices up to 20 Mbps.
Long-Haul version, E-FRL-MC05(L), uses a 1300nm LED rather than the standard 850nm LED, so it can transmit and receive data over distances up to 5,000 meters. That's almost a 3,000-meter advantage over the standard 10BASE-FL distance of 2,000 meters.

Specifications:

Standards	IEEE Std. 802.3™
Connectors	1 AUI male (DB-15); 1 duplex fiber optic
Fiber Optic Connector Specs
Switches	Position 1: On/Off selectable SQE testing for NICs and hubs that support SQE  Position 2: LinkAlert On/Off control  Position 3: Half/Full-Duplex mode control
Status LEDs	Status: Steady on indicates normal operation; Blinking once indicates link down; Blinking twice indicates AUI packets are too long (local jabber); Not lit indicates no connection to external power.  Collision: Flashing or lit LED indicates collisions are occurring.  Receive: Flashing or lit LED indicates packets are being received. Transmit: Flashing or lit LED indicates a packet has been transmitted.
Dimensions	Width: 1.65" [42 mm]  Depth: 3.8" [95 mm]  Height: 0.94" [24 mm]
Environment	0 – 40°C; 10% – 90% humidity non-condensing; 0 – 10,000 feet altitude
Shipping Weight	1 lb. [0.45 kg]
Compliance	UL Listed; FCC & CISPR Class A; CE Mark
Warranty	Lifetime