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Allows to adapt the incoming number in the SIP INVITE to match the configured number.

Example:

Phone numbers are configured in the format:

1. 0287191123450
2. 0287191123451

Incoming SIP INVITE contains the number: 0049287191123450

0049287191123450 ≠ 0287191123450 → Incoming call is not working.

You need to change that the incoming number is changed:

1. Strip the 0049
2. Add an 0 

Special Characters Used in Pattern Matching

Within the pattern, we use various letters and characters to represent sets or ranges of numbers. Here are the most common letters:

• X The letter X or x represents a single digit from 0 to 9.
• Z The letter Z or z represents any digit from 1 to 9.
• N The letter N or n matches any digit from 2-9

Ranges used in Pattern Matching

A numeric range can be used to match against a dialed number. This is also called a Character Set

• [1237-9] This pattern matches any digit in the brackets. In this example, the pattern will match: 1,2,3,7,8,9

Wildcards used in Pattern Matching

The following special characters are considered wildcards

• The '.' character matches one or more digits
• The '!' character matches zero or more digits immediately

More information can be found here: https://docs.asterisk.org/Configuration/Dialplan/Pattern-Matching/

Enter the name for this pattern.

Pattern: "0049!" The number starting with "0049" followed by zero or more digits

Cut: "4" Removes the first 4 digits "0049"

Prepend: "0" Add a "0" in front of the number

Select the VoIP provider where the Pattern should be used.