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For all other Calls, the Rate record might include the dialed NPA-NXX, just the NPA, or neither. So we try the look-up with the NPA-NXX, then the NPA, then neither. For all of the lookups, the first attempts include the Rating Group, Service Host, and the Billing Group. These are read from the Service ID of the Phone making the Call (or receiving the Call for incoming calls). If the lookup fails, then they are tried again with a blank Rating Group, then a blank Billing Group, then again with a blank Service Host. After all this, a Call Rate record should have been found. If it has not, a Rating Error is assigned to the call with a Description of "No rate defined for this call type". If there was no error, the correct rate amounts (based on time of day of the call) in the Call Rate record are multiplied by the duration to get the Call Cost. Further the call duration can be rounded to a specified duration using the CALL_USAGE_RATING_DURATION_PRECISION and CALL_USAGE_RATING_DURATION_ROUND_METHOD configuration options.
Markups
After the call Call cost is found, either from the Call Rate, or Pass Through, or Fixed Cost, some markups may be done, in this order:
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The final adjustment to the call Call cost is to round the cost to a whole penny, using the method specified in int the CALL_USAGE_RATING_COST_ROUND_METHOD configuration option. The options are to round up, round down, round to nearest with 0.5 rounding up, or round to nearest with 0.5 rounding down.
Adding Call Rates
To add a new Call Rate, click the button located on the Grid Toolbar above the Call Rates grid.
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