Max Express Ethernet Switch LB9217A-R2 & Applicable Modules
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No Connectivity to the Data Terminal Equipment.
Symptom: An Ethernet switch cannot communicate to the directly connected
computers or network segments.
Possible Problem
Solution
Incorrect or faulty
cabling
1. Check cables for a secure connection.
2. Verify that the correct type of cable is in use.
• For connection to a PC or a network interface card (NIC),
use a straight-through cable.
• For uplink to another switch or hub, use a cross-wire
cable, or use a regular straight-through cable connected to
the uplink port with the uplink button activated.
• Refer to Table 1 for cable specifications.
1. Verify proper cable preparation.
2. Use a time domain reflectometer (TDR) or other cable-
checking device to verify that the cable has no opens,
shorts, or other problems.
3. Swap the cable with another of the same kind to see if the
cable is bad.
• Replace or fix the faulty cable as necessary.
Dysfunctional NIC
on a PC or
workstation
Run the diagnostic supplied by the vendor on the NIC to
determine if it is functioning properly. If it is not, replace it.
Packet Overflow or
Hardware problem
Reset the switch by pressing the reset button or turn the
switch off, then on again.
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