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9-19
The Alarm Filters (Toll Fraud Detection)
|08:18|067|R.JONES |OUT| 5553333|05:36|00.75|
|08:20|091|R.PETERS |OUT| 19005551212|31:07|41.00|
|08:21|002|P.BROWN |OUT| 1900555444411#2|00:57|00.20|
----------------------------AAAAAAAAAAAAAAAAA-------------
Figure 9.10: Alarm Filter Format; Match Parameters Example 4
Example 4: The "Contains String" Operator ($)
This clue provides an example of how the "Contains String" operator ($)
can search a field for a specific text string, without regard for the string's
position within the field. This is useful in cases where the call record
includes a field with right justified numbers (e.g., the number dialed).
For this example, assume that the Alarm Filter Format is defined as shown
in Figure 9.10. Note that the first three lines in Figure 9.10 are sample call
records, and the fourth line is the Alarm Filter Format.
Where A is the field that lists the number dialed.
In this example, the PBX also records digits entered after the call has
connected. This is often seen in cases where the caller is prompted to press
numbers in order to access a specific department or extension. In the third
line of the example, the digits "11#2" represent digits entered after the call
was connected.
Match Parameters for this Alarm Clue would be defined as follows:
A$1900
Where A$1900 tells NetLink II to count calls that have the string "1900"
anywhere in the "A" field. When the "$" operator is used, wild card
characters are not used to fill the remaining digits.
Note: When the "Contains String" operator is used, the clue may
also count call records that do not fit the intended purpose of the
clue. For example, the clue in this example would also count calls
to any number that contains the string "1900", such as "555-1900".
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