Patton electronics 3324, Getting Started Manual

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Installation 67
Model 3324 VDSL Carrier-Class Aggregator Configuration Guide 5 • Troubleshooting
Installation
Verify that all system components have been properly installed. If one or more components appear to be mal-
functioning (e.g., the power cord or network cabling), test them in an alternate environment, where you are
sure that all the other components are functioning properly.
Transmission Mode
The default transmission mode of the RJ-45 ports is auto-negotiation. Therefore, if the Link signal is disrupted
(e.g., by unplugging the network cable and plugging it back in again, or by resetting the power), the port will
try to reestablish communications with the attached device Model 3324 through auto-negotiation. If auto-
negotiation fails, then communications are set to half duplex by default. Based on this type of industry-stan-
dard connection policy, if you are using a full-duplex device that does not support auto-negotiation, communi-
cations can easily be lost (i.e., reset to the wrong mode) whenever the attached device is reset or experiences a
power fluctuations. The best way to resolve this problem is to upgrade these devices to products that will sup-
port auto-negotiation.
Cabling
• Verify that the cable type is correct.
• Be sure RJ-45 cable connectors are securely fastened into the correct ports.
• Use 100W straight-through cables for all standard connections.
• Use Category 5 cable for 100/1000Mbps Fast Ethernet connections, or Category 3, 4 or 5 cables for stan-
dard 10Mbps Ethernet connections.
• Be sure RJ21 phone wiring, use 18~26 gauge.
• Make sure all devices are connected to the network. Equipment any have been unintentionally discon-
nected from the network.
• When cascading two devices using RJ-45 station ports at both ends of the cable (Model 3324 supports auto
MDIX), without crossover cable can be used.
Physical Configuration
If problems occur after altering the network configuration, restore the original connections, and try to track the
problem down by implementing the new changes, one step at a time. Ensure that cable distances and other
physical aspects of the installation do not exceed recommendations
System Integrity
As a last resort verify the switch integrity with a power-on reset. Turn the power to the switch off and then on
several times. If the problem still persists and you have completed all the preceding diagnoses, contact your
dealer for assistance.
CPE (Customer Premise/Remote) Side Starts Link Watch Dog
If the CPE side (VDSL Modem) is on power standby for an excess of 20 minutes without connecting to the
Model 3324, the link has failed. The users must power cycle the CPE once to clear and the CPE should recon-
nect to the Model 3324.