3Com 3C16700A - Manual (Page 10)

10
T HE O FFICE C ONNECT E THERNET H UB 4 AND 4C
Ethernet Hub 4 and 4C—Front
1 2 3 4
Green=AUI
off=COAX
1% 2% 3% 6% 12% 25% 50% 80%
Port Status Network Utilization
Partitioned
AUI/COAX
Alert
OfficeConnect Ethernet Hub 4C Green = OK, Yellow = Partitioned
Power Collision Activity
Alert LED
orange
Alerts you to excessive
network use or an
isolated (partitioned)
10BASE-T port.
Power LED
green
Indicates that the hub is
powered on.
Collision LED
yellow
Flashes each time a collision is detected
on the network. Collisions are part of
normal network operation.
Activity LED
(Hub 4 only)
yellow
Flashes each time
a packet is
received on a
port.
Network Utilization LEDs (Hub 4C only)
green/yellow/orange
Indicates how much your network is being used.
10BASE-T Port Status LEDs
green/yellow
green
yellow
off
Indicates the status of each 10BASE-T port.
— The link between the port and the next
piece of network equipment is OK.
— The port has partitioned due to a fault on
that segment.
— Nothing is connected to the port or the link
has failed.
AUI/COAX Status LEDs (Hub 4C only)
green/off=media, yellow=partition
green/off
yellow
Indicates the status of the AUI or 10BASE-2 port, depending on which one is in use.
— 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.
— If the right-hand status LED is yellow, the port in use has been partitioned.
3C16700.book Page 10 Wednesday, July 7, 1999 5:46 PM