Enterasys mrx Installation Instruction

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REQUIREMENTS/SPECIFICATIONS
WARNING:  Do not connect the shield at both ends of a thin net
segment to ground.  Only one end of the shield should be connected
to earth ground.
The BNC ports of the Coaxial Interface Modules are not
connected to earth ground.
2.3.4  Transceiver/AUI Requirements
When connecting an external network segment, via a transceiver and
an AUI cable, to the HUB with a Single Port AUI Interface module
(SPIM-A), the following network requirements must be met:
Transceiver/Ethernet Device - The transceiver or Ethernet
Device to which the module will be connected must meet IEEE
802.3 standards, and/or Ethernet Version 1.0 or Version 2.0
requirements.
AUI Cable - The AUI cable connecting the module to a device
must be IEEE 802.3 type cable.
Length - The AUI Cable must not exceed 50 meters in length.  If
28 AWG thin office drop AUI cable is used, then the maximum
cable length is limited to 50 feet (15.24 meters).