User`s guide

About the CSX200
CSX200 Family User’s Guide 7
Ethernet LAN Connection
The CSX200 provides 10 Mbps Ethernet/IEEE 802.3 support through twelve (11 if Call Backup is
enabled) 8-pin RJ45 10BASE-T ports on the front of the unit (see Figure 1).
Repeater Functionality — The CSX200 fully conforms to the IEEE 802.3 Repeater, AUI, and
10BASE-T specifications, and provides the flexibility to connect networks using IEEE 802.3,
Ethernet Version 1 or Version 2 equipment. The CSX200 transmits retimed data packets,
regenerates the preamble, extends fragments, and arbitrates collisions.
The CSX200 automatically partitions problem segments, and reconnects repaired segments to the
network. This feature minimizes the impact on network operation resulting from a problem on one
segment by isolating the problem segment. Only devices on the problem segment are affected.
When the problem is solved, the CSX200 automatically reconnects the isolated segment to the
network.
Polarity Detection and Correction — Each twisted pair port on the CSX200 incorporates a
Polarity Detection and Correction feature that allows the CSX200 to pass data regardless of the
polarity of the twisted pair segment’s receive link. Cabletron does not recommend operating in this
condition. When this condition is detected, remove the segment from the network and wire it
correctly to reduce the potential for problems if equipment changes are made.
Flash EEPROMs — The CSX200 uses a Flash Electrically Erasable Programmable Read-Only
Memory (EEPROM) that allows the downloading of new and updated firmware in conjunction
with Cabletron Systems QuickSET or any device utilizing BootP or TFTP protocols.
LANVIEW LEDs — Cabletron Systems LANVIEW Status Monitoring and Diagnostics System
is a troubleshooting tool that helps in diagnosing power failures, collisions, cable faults, and link
problems. The LANVIEW LEDs are conveniently located on the CSX200 front panel.
RESET Button — Resetting the hub with the front panel RESET button reboots the CSX200 and
initializes the processor. The RESET button is also used with the mode switches to clear NVRAM.