Manipulating Number Prefix

The device supports a notation for adding a prefix where part of the prefix is first extracted from a user-defined location in the original destination or source number. The notation is entered in the 'Prefix to Add' field in the Number Manipulation tables (see Configuring Source/Destination Number Manipulation): x[n,l]y...

where,

■ x = any number of characters/digits to add at the beginning of the number (i.e. first digits in the prefix).
■ [n,l] = defines the location in the original destination or source number where the digits y are added:
● n = location (number of digits counted from the left of the number) of a specific string in the original destination or source number.
● l = number of digits that this string includes.
■ y = prefix to add at the specified location.

For example, assume that you want to manipulate an incoming IP call with destination number "+5492028888888" (i.e., area code "202" and phone number "8888888") to the number "0202158888888". To perform such manipulation, the following configuration is required in the Number Manipulation table:

1. The following notation is used in the 'Prefix to Add' field:

0[5,3]15

where,

● 0 is the number to add at the beginning of the original destination number.
● [5,3] denotes a string that is located after (and including) the fifth character (i.e., the first '2' in the example) of the original destination number, and its length being three digits (i.e., the area code 202, in the example).
● 15 is the number to add immediately after the string denoted by [5,3] - in other words, 15 is added after (i.e. to the right of) the digits 202.
2. The first seven digits from the left are removed from the original number, by entering "7" in the 'Stripped Digits From Left' field.

Example of Configured Rule for Manipulating Prefix using Special Notation

Parameter

Rule 1

Destination Phone Pattern

+5492028888888

Source Phone Pattern

*

Source IP Address

*

Stripped Digits from Left

7

Prefix to Add

0[5,3]15

In this configuration example, the following manipulation process occurs:

1. The prefix is calculated as 020215.
2. The first seven digits from the left are removed from the original number, thereby changing the number to 8888888.
3. The prefix that was previously calculated is then added.