Cabletron Systems TRXI-42A User Manual
Page 15
REQUIREMENTS/SPECIFICATIONS
Page 2-3
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.
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.
Table 2-2. UTP Maximum Lobe Lengths
UTP Cable Type
Maximum Lobe Length
4 Mbps
16 Mbps
Category 3
200 meters
100 meters
(656 feet)
(328 feet)
Category 4
200 meters
100 meters
(656 feet)
(328 feet)
Category 5
250 meters
120 meters
(820 feet)
(394 feet)