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When you set one up an outside line manually you have to “cut”  called “cut” the incoming number in Gateway group to match the pattern that you have defined in “Inbound routes”.

If E.g. the incoming phone number is 02871 2397567 and you want  to let pass only want to map the last 3 digits (567) to extension 12, you have to cut off  02871 2397 and . First step would be to set the "Pattern" in "Inbound routes" set "Pattern" to ^(567) and "Target" to 12.. The next step is to define the filtering rules in "Gateway groups".

Depending on provider, incoming numbers can be formatted in different ways. Therefore, all possible formats should be checkedThere are several forms how number can come from provider, depending on the provider. That's why you have to check all possibilities.

 

 

 

 

Prefix    

 

City prefix

 

Number 

 Comment

 

 

 

 0049

 

 2871

 

 2397   

 

 567

Called Incoming number 0049 2871 2397567

 

 

 

+49

 

 2871

 

 2397   

 

 567

Called Incoming number +49 2871 2397567

 

 

 

 49

 

 2871

 

 2397    

 

 567

Called Incoming number 49 2871 2397567

 

 

 

0

 

  2871

 

 2397   

 

 567

Called Incoming number 02871 2397567

 

 

 

 

 

 

 

 2397

 

 567

Called Incoming number 2397567

 

 

(?:

0049|\+49|49|0

)? 

 

 

   

 

 

It will be checked if Check wether 0049 or +49 or 49 or 0 is part of incomming the incoming number.

If yes, this part will be cut off.

 

(?:

 

 

 

2871

)?

 

 

 

It will be checked if Check wether 2871 is part of incomming the incoming number.

If yes, this part will be cut off.

^(?:

 

 

 

 

 

 

2397

)?

 

 It will be checked if Check wether 2397 is part of incomming the incoming number.

If yes, this part will be cut off.

 

 

 

 

 

 

 

 

 

(.*)

All numbers , who that are still thereleft, they will be saved in $1

^(?:

(?:

(?:

0049|\+49|49|0

)?

2871

)?

2397

)?

(.*)

ExpressionComplete expression.

                                      ^(?: ( ?: (?: 0049|\+49|49|0)?2871)? 2397 )?(.*)    567 will be saved in $1 and compared to the pattern in "Inbound routes".

 

 

 

If you want to use the complete number 2397567 in “Inbound routes”.

 

That The filtering rules should look like this:

 

 

 

Prefix

 

City prefix

 

Number

Comment

 

 

0049

 

2871

 

 2397567

Called Incoming number 0049 2871 2397567

 

 

+49

 

2871

 

 2397567

Called number Incoming number +49 2871 2397567

 

 

49

 

2871

 

 2397567

Called number Incoming number 49 2871 2397567

 

 

0

 

2871

 

 2397567

Called number Incoming number 02871 2397567

 

 

 

 

 

 

 2397567

Called number  Incoming number  2397567

 

(?:

0049|\+49|49|0

)?

 

 

 

It will be checked if Check wether 0049 or +49 or 49 or 0 is part of incomming the incoming number.

If yes, this part will be cut off.

^(?:

 

 

 

2871

)?

 

It will be checked if Check wether 2871 is part of incomming the incoming number.

If yes, this part will be cut off.

 

 

 

 

 

 

(.*)

All numbers , who that are still thereleft, they will be saved in $1

^(?:

(?:

0049|\+49|49|0

)?

2871

)?

(.*)

ExpressionComplete expression.

                        ^( ?: (?: 0049|\+49|49|0)?2871)?(.*)                      2397567 will be saved  in $1 and compared to the pattern in "Inbound routes".

...

Explanation:

(.*) – all numbers which are still are there

$1 – is a variable, in this variable will be saved all from (.*) will be saved in this variable

(?:XXXXX)? – means if XXXXX exist exists, this part will be “cut”.

| – is "or"

...