The LinkBuilder repeaters from 3Com have two ports on the front panel and a slot for a Transceiver Interface (port 3) on the rear panel. ??The 3C1650-5 Fiber Optic Repeaters have one AUI port and a pair of fiber optic connectors on the front panel. The AUI port can be connected to any Ethernet cable type using a suitable transceiver. The 3C1650-5 Repeater has a pair of ST bayonet type connectors. This Repeater has been designed to conform to the IEEE 802.3 standard for Local Area Networks. The Repeater provides all the standard functions of an 802.3 repeater, including signal retiming, preamble regeneration, fragment extension and automatic partition/reconnection. The Repeater is force cooled by a fan located on the right-handside of the unit when viewed from the front. Air flow around the unit and through the vents in the side of the case must not be restricted. Minimize