Cabletron Systems MICROMMAC-22T User Manual
REQUIREMENTS/SPECIFICATIONS
2-9
Other Considerations
In addition to complying with the preceding cable specifications, the
following recommendations should be followed to minimize errors and
obtain optimum performance from the network:
following recommendations should be followed to minimize errors and
obtain optimum performance from the network:
•
UTP cabling should be free of splices, stubs, or bridged taps.
•
Maintain a two punch-down block limit between TCU ports and wall
outlets.
outlets.
•
Properly ground metal troughs, ducts, etc. carrying Token Ring
signals.
signals.
•
Avoid routing Token Ring signals near copper cables that exit a
building or are susceptible to lightning strikes and power surges.
building or are susceptible to lightning strikes and power surges.
•
UTP cables containing Token Ring signals should not be
simultaneously used for applications which may impress high voltages
(greater that 5 volts) with sharp rise or fall times. The noise coupling
from such signals could directly cause errors on the Token Ring
network.
simultaneously used for applications which may impress high voltages
(greater that 5 volts) with sharp rise or fall times. The noise coupling
from such signals could directly cause errors on the Token Ring
network.
•
Lobe lengths between TCU ports and connected devices should not
exceed 100 meters of 22 to 24 AWG wire.
exceed 100 meters of 22 to 24 AWG wire.
•
Wherever possible, use dedicated UTP cable for Token Ring signals.
2.3 COM PORT SPECIFICATIONS
The RJ45 COM 1 and COM 2 ports (Figure 2-2) support Local
Management applications. A description of COM port applications is
listed below:
Management applications. A description of COM port applications is
listed below:
Figure 2-2. COM 1/COM 2 Ports
COM 2
COM 1
TOKEN RING HUB
WITH
LANVIEW®
SUPPORTING 100 OHM UTP CABLE
MicroMMAC-24T
DISPLAY RESET
SPEED
16M
4M