NETWORK REQUIREMENTS/SPECIFICATIONS
2-3
REPEATER FUNCTIONALITY (Cont..)
JAM Output:
If a collision occurs on one of the
segments, a pattern of 1, 0 is sent to
the other segments.
Minimum Packet Repeated:
96 bits including preamble (Packet
fragments are extended using the
JAM [1, O] data pattern).
FAULT Protection:
Each segment will disconnect itself
from the other segments if 33
consecutive collisions occur, or if the
collision detector of a segment is on
for longer than approximately 2.4
ms. This FAULT protection will
reset automatically after one packet
is transmitted onto the FAULT
protected segment without causing a
collision.
FRONT PANEL INDICATORS
Fail (Error)
When lit, this LED indicates that a
problem has been detected with the
IRM (red indicator).
CLN (Collision Present)
When lit, this LED indicates the IRM
is detecting a collision signal from
one of the segments connected to the
MMAC (red indicator).
Unlabeled (Yellow LED)
When lit this LED indicates that the
IRM is receiving network
management packets.
Unlabeled (Green LED)
When lit this LED indicates that the
IRM network management
capabilities are on line and
functional.
