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Chapter 2: Network Requirements
2-2 2H23-50R/2H33-37R User’s Guide
2.3 100BASE-TX NETWORK
When connecting a 100BASE-T segment to any ports of CONN 1
through CONN 4 (2H23-50R), CONN 1 through CONN 3 (2H33-37R),
or an FE-100TX installed in slot 5 or 6 of the 2H23-50R, the device at the
other end of the twisted pair segment must meet IEEE 802.3u
100BASE-TX Fast Ethernet network requirements for the devices to
operate at 100 Mbps. Refer to the Cabletron Systems Cabling Guide for
details.
2.4 100BASE-FX FIBER OPTIC NETWORK
Slots 5 and 6 of the 2H23-50R can also support the Cabletron Systems
FE-100FX and FE-100F3 fiber optic interface modules. The device at the
other end of the fiber optic segment must meet the 100BASE-FX Fast
Ethernet network requirements to operate at 100 Mbps. Refer to the
Cabletron Systems Cabling Guide for details.
Multimode Fiber Optic Cable Length
The maximum multimode fiber optic cable length of a 100BASE-FX
segment is covered in the Cabletron Systems Cabling Guide.
Single Mode Fiber Cable Lengths
The maximum single mode fiber optic length of a 100BASE-FX segment
may be no more than 5 km between Data Terminal Equipment (DTE to
DTE) in half duplex mode or 20 km (DTE to DTE) in full duplex mode.
NOTE
The 2H23-50R with an FE-100TX installed is capable of
operating at either 10 or 100 Mbps. The FE-100TX can
automatically sense the speed of the other device and adjust
its speed accordingly.
If operating at 100 Mbps, each pair in a cable must be
Category 5 compliant with an impedance of 85 to 111 ohms.