Caller Number Normalization

Providers can send the caller number in various formats (e.g. for french national number you could receive 0123456789 or +33123456789 or even 33123456789). You can change the caller number to adapt to your need. For examples:

you may want to always display incoming numbers in E.164 format (e.g. +33123456789)
or, if you use a prefix to dial outgoing numbers (like a 0), you should add a 0 to the received caller number so you can redial it.

This caller number normalization is done via the xivo_in_callerid.conf file.

Important

Before modifying this file, you must know:

that any caller number modification will break the Customer Call History,
and that the Reverse lookup is done with the caller number after it has been modified through the rules of this xivo_in_callerid.conf file.

Therefore, if you need to have the Customer Call History (used in CC Agent and Switchboard applications), then you must void all the rules in this file (i.e. remove the content of the add and strip lines so the caller number is not changed). But then you must take care that, if you also use the Reverse lookup, the phone numbers in your directory are stored in the same format than received from the provider (i.e. if your provider sends +33123456789 the phone number must be stored in the directory as +33123456789).

Default rules

By default the following rules are applied

National number with missing prefix

rule: if caller number does not start by 0 and is 9 digits long
action: add a leading 0
example: 123456789 is normalized to 0123456789

French national number E.164 format

rule: if caller number starts with +33 and is followed by 9 digits
action: replace +33 with 0
example: +33123456789 is normalized to 0123456789

International number E.164 format

rule: if caller number starts with + followed by at least 4 digits
action: replace + with 00
example: 33123456789 is normalized to 0033123456789

International number with missing prefix

rule: if caller number does not start by 0 and is at least 11 digits long
action: add a leading 00
example: 33123456789 is normalized to 0033123456789