Go to the Voip -> click on Provider and select Prefix/Prefixes Prefissi
To add a prefix click on “
ADD
”: 
Control of the permissions for this Prefix: If NO bypass the control for the user otherwise it
controls the permissions
.
Composition dialstring prefixes:
_ = accept everything that comes before
85 = this number must always be present
Xx = this number is variable
. = accept everything that comes after the period (digits on the keyboard)
NOTE
If at the end of the dialstring there isn’t any period you can digit as many
number as the X.
Example
The Dialstring of the prefix _XXX can filters the number between 0 and 999, the
numbers dialled after won’t be considered.
Composition dialstring prefixes:
_0XXX.
The Strategy of the Prefixes must be planned before starting the configuration of the Station.
The prefixes have two possible strategies:
1° with intrinsic selection of the default Provider
The Intrinsic Selection of the Provider is the definition for the macro prefixes so that
the flow of the call is determined by his prefix or his root.
Example of Prefix for Milan:
If you want to use two different Providers to direct the local and the national calls you
should separate the prefixes as shown below:
_02. With Eutelia Provider (only for Milan)
_0XX. With Skypho Provider (all the other prefixes starting by 0)
_3XX. With Squillo Provider (all the mobile phones)
In this case in the provider setting
the RemoveNum is 0.
2° With the Provider selection
The Provider selection is determined by the number put before the prefix, for example
in the number, 00212345678, 0 identifies the Provider that will take the Outgoing Call.
For Example
_0XXX. With Eutelia Provider
_1XXX. With Skypho Provider
_2XXX. With Squillo Provider
In this case in the provider setting
the RemoveNum is 1.
Click on the appropriate button to confirm the changes
Save the Rescue Point as described in the "Saving Rescue Point
" section and we recommend
that you insert a description of the changes.
(Example: “Prefix Added“)
