Acer ALH-608ds Manuale Utente

4-1

4.1  Symptoms and Suggestions

Symptoms

All LEDs are
off

Link LED of a
connected
port is off

100 LED is
not lit when
connected to
a 100 NIC or
100 Hub(but
Link LED is
lit.)

Possible Reason

Suggestions

The hub is not receiving
DC power

1.The UTP cable is not 

securely connected

2.The port is bad
3. If the other party is a 

PC, the Network 

interface card(NIC)

could be not working

1. Check if the AC power cord

is securely fastened at both
ends ands that power is 
available at the AC outlet.

2. Check if the power adapter

DC 5V cord is connected to
Hub's DC jack

1. Check the cable connection

2.Try to connect another port

3. Check if the network 

interface card(NIC)is 
installed properly

4. If the other party is a 

hub or LAN switch, the 
connected ports signal 
could be cross-over

4. Make sure ALH-608ds 

normal port is connected to 
the other hub's(or 
switch's)uplink port(or called
cross-over port); and ALH-
608ds uplink port is 
connected the other's 
normal port

5. The UTP cable is 

broken, or it is a cross-
over cable

The auto-negotiation
function is failed between
ALH-608ds and the other
party

5. Try another normal cable

1. Un-plug the UTP cable from

ALH-608ds, and plug-in 
again

2. Check if the NIC is set to 

anto-negotiation mode

3. Check if the other hub is set

to auto-negotiation mode

4. if the above steps does not 

work, it is an inter-
operability problem, contact 
your vendor

608-UM  1/8/99 2:34 PM  

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