The Data Filters
Example 1: To create a Data Filter Clue that will reject call records
received on Sunday, match parameters would be defined as w=1. Where w
is the Real-Time variable for the day of the week, and 1 indicates Sunday.
Example 2: To create a Data Filter Clue that will reject call records
received after 6:00 pm (18:00) or before 7:00 am (07:00), match parameters
would be defined as follows:
Where t is the Real-Time variable for the time of the day, and + is the
logical OR operator.
Real-Time variables are not defined in the Data Filter Format.
Match parameters can include both Real-Time variables and
regular variables, as well as logical and relational operators.
Real-Time variables function independently from the Time/Date
Stamp. The Time/Date Stamp does not have to be enabled in
order for the Real-Time variables to function.
Values from the internal clock/calendar are not included in the
call record, unless the Time/Date Stamp is enabled.
8.6. Assigning the Data Filter to a Port
After the Data Filter is defined, the next step is to assign the filter to
one or more of the input ports. The port configuration menus are used
to assign one of the two available Data Filters to each port as described
in Section 5.4. Note that Data Filters will not function unless they are
assigned to a port.
8.7. Data Filter Definition Examples
The following examples are based on fictional PBX call record formats.
When designing your Data Filter, be aware that the record format will differ
from those shown in the examples. When defining the Data Filter Format
and Match Parameters the following factors should be considered:
Exact Match: Alphanumeric values in parameter definitions must
exactly match those found in the call record. If the record lists the
time as "09:00", then the parameter definition must also list time as
"09:00" (not "0900" or "9:00").
Number of Characters : For any given variable, the number of
characters specified in the Data Filter Format must exactly match the
number of characters indicated in the Match Parameters definition.
For example, if the filter format defines "B" as the first seven
characters of the number dialed, the parameter definition must account
for all seven characters.
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