In the SBC Edge, Regular Expressions can be used for phone number matching and transformation. Use of Regular Expressions for phone number transformation is supported in the Transformation Tables .

Examples of Regular Expressions for phone number matching and transformation are shown below. For more information about Regular Expression syntax, see Understanding Regular Expressions.

## Examples of Phone Number Matching and Transformation using Regular Expressions

Phone number transformation is the process of matching phone number patterns and transforming them to a single standard format.

In the context of Enterprise Voice, the single standard format could be the local numbering plan, the E.164 numbering scheme, as well as a SIP URI.

The following table illustrates use of Regular Expressions for matching phone number patterns and phone number transformations:

Rule Name |
Description |
Input Pattern |
Output Pattern |
Result |
---|---|---|---|---|

4-digit Extension |
Transforms 4-digit extensions |
(\d{4}) |
+1425555\1 |
1234 is transformed to +14255551234 |

5-digit Extension |
Transforms 5-digit extensions |
8(\d{4}) |
+1425558\1 |
81234 is transformed to +14255581234 |

7-digit calling Fremont |
Transforms 7-digit numbers to Fremont local number |
(\d{7}) |
+1510\1 |
5551212 is transformed to +15105551212 |

7-digit calling Dallas |
Transforms 7-digit numbers to Dallas local number |
(\d{7}) |
+1972\1 |
5551212 is transformed to +19725551212 |

10-digit calling US |
Transforms 10-digit numbers in US |
(\d{10}) |
+1\1 |
5105551212 is transformed to +15105551212 |

Long Distance (LD) Calling US |
Transforms numbers with LD prefix in US |
1(\d{10}) |
+1\1 |
12145551212 is transformed to +12145551212 |

International Calling |
Transforms numbers with US international prefix |
011(\d*) |
+\1 |
011914412345678 is transformed to +914412345678 |

Fremont Operator |
Transforms 0 to Fremont Operator |
0 |
+15105551212 |
0 is transformed to +15105551212 |

Fremont Site Prefix |
Transforms numbers with on-net prefix (6) and Fremont site code (222) |
6222(\d{4}) |
+1510555\1 |
62221234 is transformed to +15105551234 |

New York Site Prefix |
Transforms numbers with on-net prefix (6) and New York site code (333) |
6333(\d{4}) |
+1202555\1 |
63331234 is transformed to +12025551234 |

Dallas Site Prefix |
Transforms numbers with on-net prefix (6) and Dallas site code (444) |
6444(\d{4}) |
+1972555\1 |
64441234 is transformed to +19725551234 |

URI to E.164 format |
Transforms URI with on-net prefix (+999) to E.164 format |
\+999(.*)@.* |
0119144\1 |
+99912345678@net.com is transformed to 011914412345678 |

The use of caret symbol (^) for beginning of a number-matching pattern and the dollar sign ($) for the end of the pattern is implicit. The regular expression rule will work with or without them.

## Detailed Examples

### Example 1: Using Regular Expression for Route Match

- Select
**Using Regular Expression**option. Match Rule:

(.*)@net\.com

Transformation :

\1

In this example, the input text

*john.doe@net.com*matches the Match Rule and the output will be "john.doe". The Input text*john.doe@invalid.com*does not match.Expression Input

Expression Output

john.doe@net.com

john.doe

jane_doe@net.com

jane_doe

jdoe@net.com

jdoe

john.doe@invalid.com

expression does not match: no output

### Example 2: Local calls transformed to National numbering plan

- Select
**Using Regular Expression**option. Match Rule:

(\d{7})

Transformation:

1510\1

In this example, any 7 digit number as input matches the Match Rule and the output will be the same 7-digit number prefixed with 1510.

Expression Input

Expression Output

8889999

15108889999

4441234

15104441234

### Example 3: 10-digit long distance (LD) calls transformed for 11-digit dialing

- Select
**Using Regular Expression**option. Match Rule:

(\d{10})

Transformation:

1\1

In this example, any 10-digit number as input matches the Match Rule and the output will be the same 7-digit number prefixed with 1.

Expression Input

Expression Output

5107779999

15107779999

### Example 4: Stripping +-sign from the number (when terminating to some ISDN providers)

- Select
**Using Regular Expression**option. Match Rule:

\+(.*)

Transformation:

\1

In this example, any destination number prefixed with a +-sign (plus-sign) as input matches the Match Rule and the output will be the same number without the +-sign.

Expression Input

Expression Output

+914412345678

914412345678

### Example 5: Replacing "011" (international prefix) with +-sign

- Select
**Using Regular Expression**option. Match Rule:

011(.*)

Transformation:

+\1

In this example, any destination number prefixed with a +-sign (plus-sign) as input matches the Match Rule and the output will be the same number without the +-sign.

Expression Input

Expression Output

011914412345678

+914412345678

### Example 6: Transforming only URI's that start with "+999" and have a ".com" extension to E.164 format

- Select
**Using Regular Expression**option. Match Rule:

\+999(.*)@(.*)\.com

Transformation:

0119144\1

In this example, any destination URI +99912345678@net.com matches the pattern

`+999`

, followed any character set`(.*)`

, followed by the @-sign, followed any character set`(.*)`

, followed by and ending with`\.com`

, the first character set is preserved and`0119144`

is prefixed to it resulting in`011914412345678`

.

Expression Input | Expression Output |
---|---|

+99912345678@net.com | 011914412345678 |