Allied Telesis CentreCOM transceiver

These CentreCOM Micro Repeaters are two port media converters designed for the Fiber Optic Inter Repeater Link (FOIRL) to coaxial cable media market place. These micro repeaters allow for connection of an FOIRL segment to a thinnet (10BASE2) coaxial segment with the AT-MR117F. Segments on either side of the unit support full length, fully repeated transmission and allow the maximum number of nodes specified by the IEEE. These media converters utilize state-of-the-art technologies, including a custom Application Specific Integrated Circuit (ASIC) and Surface Mount Technology (SMT), which provide enhanced functionality, increased reliability and improved performance. The CentreCOM Micro Repeaters provide the complete functionality of large repeaters, including packet regeneration and network partitioning. Packet regeneration results in a higher performance network by regenerating preamble, retiming the data packets and extending collision fragments to ensure collision enforcement by all nodes. The use of a proprietary ASIC and an external power supply permits Allied Telesis' to make the CentreCOM Micro Repeaters extremely compact. The units small size allows for the repeater function to be brought to the desktop or used in wall mount installation. The AT-MR117F (BNC to FOIRL) has a switch-selection for full repeater or half repeater mode. In the full repeater mode each repeater counts toward the total repeater count specified by IEEE 802.3. In certain situations (i.e. connections between buildings using the FOIRL ports), fully repeated functionality is not needed. The half repeater mode allows a pair of repeaters linking the two networks together to count as one repeater. Network diagnostic LEDs are provided on the front of the CentreCOM Micro Repeaters to aid in troubleshooting and fault isolation. Both segments have "Transmit," "Receive," "On Line" and "Collision" indicators. All units come with a "Power" indicator and a "Link Integrity Test" LED is provided for the fiber optic port.