Cabletron Systems TRMIM 24A TRMIM-24A User Manual page 15

Maximum Lobe Lengths
The lobe length is the physical length of the cable connecting a station
to its TCU port at the TRXI. Table 2-2 shows the maximum lobe
length, according to ring speed. The cable lengths listed in Table 2-2
are total lengths made up of UTP cable only.
UTP Cable Type
Category 3
Category 4
Category 5
Type 3 Media Filters
To connect a UTP lobe segment from a TRXI-22A or TRXI-24A to a
station supporting STP cabling, you need a Type 3 Media Filter.
Cabletron Systems offers the following Type 3 Media Filters:
• TRMF, RJ45 (UTP) connector to 10-inch DB9 (STP) cable with
LANVIEW
• TRMF-2, RJ45 (UTP) connector to DB9 (STP) connector
Maximum Number of Stations
When you use UTP lobe cabling anywhere on the ring, the number of
stations is limited to 150 stations at ring speeds of either
4 or 16 Mbps.
REQUIREMENTS/SPECIFICATIONS
Table 2-2. UTP Maximum Lobe Lengths
Maximum Lobe Length
4 Mbps
200 meters
(656 feet)
200 meters
(656 feet)
250 meters
(820 feet)
16 Mbps
100 meters
(328 feet)
100 meters
(328 feet)
120 meters
(394 feet)
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