Master DNL Class4
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Calls are failure

There are many reasons why calls are failed. Sometimes, it can be calls that are dropped by the switch. Sometimes, it can be calls that are blocked by the vendor.
Here are some steps to go about solving them.

Step 1: Go to Disconnect Reports

Step 2: Check the Client Side Disconnect Cause

You can click on the "Counts" to look into CDRs:

Step 3: Check the Vendor Side Disconnect Cause

These are the various errors that your vendors are returning for all your calls sent to them. Note that Class 4 may attempt multiple vendors for each inbound calls. Therefore, you will see larger count value in Vendor side than the Client side normally.