7.14.1. Feature Description 
Many customers need the station numbers that appear on the charge
tickets in a particular format. They consequently need an option for
cutting off parts from or adding parts to the station numbers (for example,
ISDN codes, tie line access digits, etc.).
These modifications are necessary for making efficient analyses. A
suitable modification is critical for further ticket processing using
applications.
Station number modification in call data recording affects only the
number output in the charge tickets and so has absolutely no side-effects
on the CP functionality.
An editable modification table can be used to configure digit patterns
that can be cut off or added.
Multiple cutoff patterns and one add-on pattern can be defined for
each node number. You can also configure the numbers to which these patterns
should be applied. In addition, you can define the minimum number of
remaining digits.
The cutoff algorithm attempts to apply the longest pattern to each
node number. Each number is cut a maximum of one time. The station number
is then added. Should the resulting number be longer than 22 characters,
the final digits are cut off.