Cabletron Systems THN-MIM - Manual (Page 10)

INSTALLATION
Page 2-1
CHAPTER 2
INSTALLATION
2.1 INTRODUCTION
The Cabletron Systems THN-MIM is designed for quick and easy
installation into an MMAC. No special skills or tools are required to
install this module.
2.2 NETWORK DESIGN GUIDELINES
The following network design guidelines must be followed when
connecting segments to the THN-MIM. If not, unsatisfactory network
performance may result.
2.2.1 Thin-net Segments
This applies to the THN-MIM only. For the THN-MIM7593, see
section 2.2.2.
• 50 ohm RG-58A/U type coaxial cable must be used when making up
a thin-net cable segment. A 50 ohm terminator must be connected
to the far end of the thin-net segment.
• A maximum of 30 connections may be made to a thin-net cable
segment. These connections must be at least 0.5 meter apart.
• For safety, only one end of a thin-net segment should be connected
to earth ground. Connection to earth ground at more than one point
on the segment may allow for the occurrence of dangerous ground
currents. The BNC ports of the THN-MIM are connected to earth
ground. This eliminates the need of grounding the thin-net
segments connected to the module.
• Connections on a thin-net cable segment to host systems or
transceivers are made by BNC tee connectors. The male end of the
BNC tee connector is used to connect directly to the host or to the
transceiver. The female ends of the tee connector must be
connected to another part of the segment or to a terminator.