Allied Telesis AT-MR820T - Manual (Page 25)

AT-MR420T and AT-MR820T Installation Guide
3
Features
The AT-MR420T/AT-MR820T Micro Repeaters have incorporated the
latest technologies, including a custom Application Specific Integrated
Circuit (ASIC) and Surface Mount Technology (SMT). These result in
enhanced functionality, increased reliability, and improved
performance.
The AT-MR420T/AT-MR820T Micro Repeaters have the following
features:
❑ IEEE 802.3 compliant
❑ 10Base-T and Ethernet Version 1.0 and 2.0 compatible
❑ AUI port for connectivity to a network backbone as well as four/
eight twisted pair cable connections
❑ Automatic packet regeneration, error detection and correction
❑ Test link capability
❑ Auto partitioning and jabber lock-up protection
❑ Status and diagnostic LEDs
❑ Network Load LEDs
❑ UTP uplink port supported for network cascading
Packet Regeneration. Packet regeneration is a high-performance
network feature that includes the regenerating of the packet preamble,
retiming of data packets, and the extension of collision fragments.
Link Integrity. The IEEE 802.3 defined link integrity test function
continually monitors the twisted pair cable to ensure link continuity of
the receive pair between the user node and the repeater.
Auto Partitioning. Also known as segmentation, each segment is
automatically partitioned whenever 32 consecutive collisions are seen
on the segment. One valid packet will reset the segment and reconnect
it.
MRx20T(UTP)Ver6_Book Page 3 Thursday, April 3, 1997 5:18 PM