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CABLING
B.2 LOBE CABLING
Lobe cabling provides for the connection between end station and lobe,
or Trunk Coupling Unit (TCU) ports. A station can transmit data to and
receive data from other stations on the ring via the lobe cable attachment
to the concentrator.
B.2.1 Lobe Port
A lobe port accepts phantom current or a fiber key to allow the insertion
of a station on the ring via the lobe segment attached to the concentrator.
B.2.2 Station Port
A station port transmits phantom current or a fiber key to enter the ring.
B.3 REQUIREMENTS AND RECOMMENDATIONS
To achieve optimal performance from your installation, observe the
following recommendations:
Maintain a punch-down block/patch panel limit of two between lobe
•
ports and wall outlets.
Use properly grounded metal troughs, ducts, etc. for carrying Token
•
Ring cabling.
Avoid routing Token Ring cabling near twisted pair cables that exit a
•
building or are susceptible to lightning strikes and power surges.
Do not use UTP cabling with high voltage (greater that 5 volts) signals
•
with sharp rise or fall times. The noise coupling from such signals
could directly cause errors on the Token Ring network.
Ensure that the network meets the performance requirements listed in
•
Table
B-1.
Do not exceed the recommended cable lengths listed in
•
B-2
Table
2-2.
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