3Com Comprehensive Guide for 3C16700 and 3C16700A Ethernet Hubs

THE OFFICECONNECT ETHERNET HUB 4 AND 4C

Ethernet Hub 4 and 4C—Front

Alert LED	Activity LED	10BASE-T Port Status LEDs
orange	(Hub 4 only)	green/yellow
Alerts you to excessive	yellow	Indicates the status of each 10BASE-T port.
network use or an	Flashes each time	green — The link between the port and the next
isolated (partitioned)	a packet is	piece of network equipment is OK.
10BASE-T port.	received on a	yellow — The port has partitioned due to a fault on
	port.	that segment.
		off — Nothing is connected to the port or the link
		has failed.

Network Utilization LEDs (Hub 4C only)

green/yellow/orange

Indicates how much your network is being used.

			Port Status				AUI/COAX			Network Utilization
Alert	Power ActivityCollision	1	2	3	4	Green=AUI		Partitioned	1% 2% 3% 6% 12% 25% 50% 80%
		Green = OK, Yellow = Partitioned
						off=COAX				OfficeConnect Ethernet Hub 4C

Power LED	Collision LED
green	yellow
Indicates that the hub is	Flashes each time a collision is detected
powered on.	on the network. Collisions are part of
	normal network operation.

AUI/COAX Status LEDs (Hub 4C only)

green/off=media, yellow=partition

Indicates the status of the AUI or 10BASE-2 port, depending on which one is in use. green/off — The left-hand status LED is green if the AUI port is in use, and off if either the 10BASE-2 port is being used or nothing is connected to the port.

yellow — If the right-hand status LED is yellow, the port in use has been partitioned.

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