9-11
The Alarm Filters (Toll Fraud Detection)
9.6. Logical and Relational Operators
Variables and operators are combined to form match parameters. Variables
are the uppercase letters A through Z, as defined in the Alarm Filter Format.
Relational and logical operators are described below.
Operator
Function
>
Greater Than
<
Less Than
>=
Greater Than or Equal To
<=
Less Than or Equal To
~
Not. Can also precede other comparison operators (e.g. ~<, Not
Less Than).
=
Equal To
$
Contains String. Searches for specified string anywhere in a field
-
(Dash) Wild Card Character
( )
(Parentheses) Used to Combine and Prioritize Operations
+ or |
Logical OR Conditions
* or &
Logical AND Conditions
9.6.1. Logical AND/OR Conditions
Logical AND/OR conditions are created by including the AND operators,
or the OR operators in the Match Parameter definition.
9.6.1.1. Logical AND Conditions
The AND operators (* and &) link parameters in a manner where two or
more conditions must all be true in order for the call record to flagged
and counted.
Example:
Assume the variable "A" represents the field for the number
dialed, and "B" represents the extension number. To define an Alarm Clue
that counts calls placed to 555-1111 from extension 013, match parameters
would be defined as follows:
A=5551111*B=013
or
A=5551111&B=013
This Alarm Filter Clue would
only
count calls that are placed to 555-1111
AND placed from extension 013. Calls to 555-1111 from extension 086
would
not
be counted, and calls to 555-2222 from extension 013 would also
not
be counted.
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