Cabletron Systems MR-9000TPT User Manual - page 20
Manual is about: ETHERNET MULTIPORT REPEATER
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Receive (RECEIVE)
This yellow LED flashes when the repeater port receives data from
the network. The LED flash is pulse stretched for viewing effect.
Collision (COLLISION)
This red LED flashes when the repeater port detects a collision
condition or a jabber packet on the network. The flash frequency may
increase as network traffic increases since more collisions are likely
to occur. The LED is pulse stretched for viewing effect.
Port OK (PORT OK)
This green LED turns on when the port has a valid connection to a
network device. The repeater disconnects a segment when 32
consecutive collisions occur on the segment or when the collision
detector remains on for longer than 2 to 3 ms.
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