Cabletron Systems SEHI SEHI100TX- User Manual

Also see for SEHI100TX-22: User guide User guide

Contents

Chapter 2: SEHI Features and Options2-2SEHI100TX User’s Guide2.2 SEHI FEATURESRepeater FunctionalityThe SEHI fully conforms to the IEEE 802.3u Repeater specifications. TheSEHI transmits retimed data packets, regenerates the preamble, extendsfragments, and arbitrates collisions.The SEHI100TX-22 meets IEEE 802.3u Repeater Class I standards.Class I standards allow one repeater between any two Data TerminalEquipment (DTE) devices within a single collision domain (network).The SEHI automatically partitions problem segments, and reconnectsrepaired segments to the network. This feature minimizes the impact onnetwork operation resulting from a problem on one segment by isolatingthe problem segment. Only devices on the problem segment are affected.When the problem is solved, the SEHI automatically reconnects theisolated segment to the network.Polarity Detection and CorrectionEach twisted pair port on the SEHI incorporates a polarity detection andcorrection feature that allows the SEHI to pass data regardless of thepolarity of the twisted pair segment’s receive link.FLASH EEPROMsThe SEHI uses FLASH EEPROMs that allow the downloading of newand updated firmware using Cabletron Systems SPECTRUM ElementManager/Windows or any device using BOOTP or TFTP protocols.!CAUT IONThe SEHI100TX-22 operates in a 100BASE-T Ethernetnetwork. This product will NOT operate in a 10BASE-Tenvironment. Connect the SEHI100TX-22 and SEH100TX-22only to similar 100BASE-T products.The SEHI100TX-22 supports the EPIM-100TX and theEPIM-100FX. No other Cabletron Systems EPIMs operate inthis device.