RAD Data comm MPW-1 Specifications download pdf (Page 96)

Chapter 4 Troubleshooting and Diagnostics Installation and Operation Manual

4-18 Troubleshooting MPW-1 MP-4100 Ver. 2.0

4.4 Troubleshooting

In case a problem occurs with one of the pseudowires carried by the MPW-1

module, check the displayed alarm messages and refer to

Section

4.3

and to the

Megaplex-4100 Installation and Operation Manual

for their interpretation.

If the problem is detected the first time the module is put into operation,

perform the following preliminary checks before proceeding:

•

Check for proper module installation and correct cable connections, in

accordance with the system installation plan.

•

Check the module configuration parameters in accordance with the specific

application requirements, as provided by the system administrator.

•

If the Megaplex-4100 nodal clock is to be locked to the clock recovered from

one of the pseudowires carried by the MPW-1 module, make sure a suitable

fallback clock source is configured and provides a good clock signal.

After collecting all the relevant information, perform the actions listed below until

the problem is corrected:

• Make sure that no test has been activated on the corresponding MPW-1

internal DS1 port. Use the Megaplex-4100 management system to find the

active test or loopback, and deactivate it.

• Activate the local loopback on the corresponding port timeslots that carry the

corresponding pseudowire. While the loop is connected, the user’s equipment

served by pseudowires configured on the corresponding port should receive

its own signal; if not, the problem is external. Check cable connections, and

any transmission equipment providing the link to the user’s equipment.

• You can rapidly check the link to the remote unit by activating, at the remote

unit, the remote loopback on the corresponding timeslots of the remote

internal DS1 port. If the link operates OK, the local user’s equipment served

by pseudowires configured on the corresponding port should receive its own

signal.

If the test fails, there is a problem with the transmission through the

network, or with the MPW-1 modules:

 Using the ping test to check IP connectivity to the destination IP address

of the relevant pseudowires. If ping fails, the problem is in the network

 Repeat the test after carefully checking all the configuration parameters

of the module and its ports. If the problem persists, replace the module

and check again.

Note

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RAD Data comm MPW-1 Specifications Page 96

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