Cabletron Systems MicroMMAC-44T Guía de usuario Pagina 22

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REQUIREMENTS/SPECIFICATIONS
2-3
Maximum Lobe Lengths
Lobe length is the physical length of the cable connecting a station to its
TCU port at the MicroMMAC-T. Table 2-2 lists the maximum lobe cable
length for ring speeds of 4 and 16 Mbps. The values listed refer to total
lengths made up of UTP cable only.
Type 3 Media Filters
A Type 3 Media Filter is required when connecting a UTP lobe segment
from a MicroMMAC-22T or MicroMMAC-24T to a station supporting
STP cabling. 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 UTP lobe cabling is used in any ring segment, the number of ring
stations supported by the MicroMMAC-T is limited to 150, regardless of
the operating ring speed.
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)
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