2N VoiceBlue Enterprise - User Manual - Manual (Page 95)

LCR – Saving Automat 7-9
7.5. Normalisation of numbers
During description of the saving automat operation on the Chapter
7.1 we have mentioned also the modifications of the numbers
before the input and after the output of the routing process – so-
called normalisation. They are conditional transformations of the
called and/or calling number. This ensures the transformation into
the unified format, which then simplifies the definition of own
routing rules.
The normalisation prescription is determined by three parameters:
1) Normalisation type – determines, in what stage of the process
(input / output) and to what numbers it should be used
(called/calling).
2) Conditions – transformation will be applied only for numbers,
which fulfil the condition. The condition is specified by prefix
– chain, by which the number must begin. The prefix is
automatically detached and the residual part of the number
after the prefix goes into the transformation phase.
3) Transformation prescription – enables modification of the
number by detaching of certain number of the characters from
its starting, respectively adding of the new prefix.
To illustrate the practical possibilities, which are provided to us by
the transformation manner, we state the two typical, but entirely
different usages of the normalisation.
Example 1: It flows from the numbering plan of VoIP network,
that we must dial „0“ to call outside this network. Therefore, if we
want to call the mobile user with the number „602 123 456“, we
must dial the „0 602 123 456“ on the VoIP telephone. Before entry
into the saving automat, usually transformation into the
international format is realised. For the Czech Republic, it would
be „+420 602 123 456“.
In this case, the prefix of normalisation will be „0“, number of
subsequent detached characters 0 and the new added prefix will be
„+420“.
Example 2: the second example will be the relatively unusual
requirement for transformation of any number into the single
particular number. What is the purpose? Let us say, that we do not
want to enable the international calls through our gateway for the