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Installation
Andrew Token Ring Bridges are available in local and remote versions,
and they provide the capability to extend your network around the world.
They also provide increased network control and management functions,
based on their complete IBM compatibility.
16 Mb Token Rings
Some MAUs (Andrew Plus and E Series MAUs, for example) can be used
in 16 Mb token rings using Types 1, 2, 3, or Category 5 cabling. Category
5 cable is generally preferred for this application because of its ability to
support data rates up to 100 Mbps. This provides some margin for future
upgrades.
3.2 Calculating Distances
A simplified distance calculation method based on maximum cable length
follows:
The sum of the ARL (adjusted ring length, defined in Section 3.1,
Installation Background ) plus the cable length of the longest lobe in the
ring must be less than or equal to the distance given for your network's
configuration in one of the tables in Figures 14 through 19. Expressed as a
formula, this is:
ARL + longest lobe ≤ maximum distance for your configuration
(from the appropriate table)
NOTE:
The distances given in the tables for Type 3 cable will require
Andrew media filters between the adapters and the network cable.
Using another brand of media filter may result in decreased lobe
length. For 4 Mb rings, use CTD-440C media filters; for 16 Mb rings,
use CTD-416C media filters.
20
Lobe Access Unit User's Guide
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