understanding translation rules in cme

[baselzind]

i have a customer with a cme issue but im trying to understand his setup , among it there is these translation rules which i cant understand their meaning 

voice translation-rule 1
rule 1 /^2227\(....\)/ /\1/
!
voice translation-rule 2
rule 1 /.*/ /2227\0/
!
voice translation-rule 3
rule 1 /^7100/ //
rule 2 /^7300/ //

kindly explain them?

[Abhay Singh Reyal]

Find the below link helpful 

http://www.cisco.com/c/en/us/support/docs/voice/call-routing-dial-plans/61083-voice-transla-rules.html

You can find more helpful links on google to understand voice translation rules. 

Regards

Abhay

[Manish Gogna · Accepted solution]

voice translation-rule 1
rule 1 /^2227\(....\)/ /\1/   --- Any number begining with 2227 followed by any 4 digits will be converted to last 4 digits only , example 22272222 will be converted to 2222.

voice translation-rule 3
rule 1 /^7100/ //
rule 2 /^7300/ //    - matches any numbers begining with 7100 and 7300 and replaces them with Null

You can use the following for reference

Match String	Replace String	Dialed String	Replaced String	Comments
/^$/	/ /	NULL	NULL	Simple Null to Null translation.
/^.*/	/ /	9195551212	NULL	Any to Null translation.
//	//	9195551212	9195551212	Match any string but no replacement. Use this to manipulate the call plan or call type.
/^392\(.*\)/	/555\1/	3921212	5551212	Match the beginning of a variable length string.
/^\(555\)\(....\)/	/444\2/	5551212	4441212	Match the beginning of the string. The second paren structure is pulled to the new string.
/^555\(....\)/	/444\1/	5551212	4441212	Match the beginning of the string. Notice the \1 replaces the first group of the regular expression within parenthesis.
/\(^...\)555\(....\)/	/\1444\2/	9195551212	9194441212	Match the middle of a string.
/\(^...\)\(555\)\(....\)/	/\1444\3/	9195551212	9194441212	Match the middle of a string.
/\(.*\)1212$/	/\13434/	9195551212 555121212	9195553434 555123434	Match the end of a string.
/\(.*\)1212/	/\13434/	9195551212 555121212	9195553434 555123434	Match the end of a string. There is no need for an implicit $ at the end for this particular example.
/444/	/555/	4441212 44441212 44414441212	5551212 55541212 55514441212	Match the substring.
/^[135]/	/9/	12345 22345 32345	92345 22345 93245	Match certain numbers.
/^[1-35]/	/9/	1234 2345 4567 8456	9234 9345 4567 8456	Match a range.
/^[^1-35]/	/9/	1234 2345 4567 8456	1234 2345 9567 9456	The ^ in the list means do not match these items.
/^1#/	//	1#456	456	Match 1# at the beginning and replace it with Null.
/^1\#\(.*\)/	/\1/	1#456	456	The same as the previous expression, but composed differently.
/^1\*/	//	1*456	456	Match 1* in a pattern and replace it with Null.
/^1\*\(.*\)/	/\1/	1*456	456	The same as the previous expression but composed slightly different.
/^5+/	/9/	5888 55888 555888 5588855	9888 9888 9888 988855	This is an example of the use of the '+' option.
/^\(555\)+\(.*\)/	/444\2/	5551212 555551212 5555551212 5551212555	4441212 444551212 4441212 4441212555	This is another example of the '+' option. This searches for the 555 pattern repeated at the beginning.
/^9?1?\(919\)/	/\1/	9195551212 19195551212 919195551212 99195551212	9195551212 9195551212 9195551212 9195551212	Here is how the '?' string can be used. For example, if you want to strip some preceding digits that are or are not present. In this case you want to strip the leading 9 or 1 or 9 and 1 together.
/1234/	/00&00/	5551234	55500123400	Match the substring.
/1234/	/00\000/	5551234	55500123400	Match the substring (same as &).

HTH

Manish

[baselzind]

thank you very much , but regarding first rule which part in the first rule says to convert to the last 4 digits? the /\1/ ?

also what is the point in the translation rule 3 to match 7100 and 7300 and replaces them with Null ? like if a person dials 7100 or 7400 it will replace them with nothing? is it like a person dials 7100 999 and the 7100 will be removed leaving 999 to dial?

do you know the what is the translation rule 2 meaning? 

[Manish Gogna]

The syntax for voice translation rules is the following:

rule precedence /match pattern/   /replacement pattern/

You can use the test voice translation-rule command to test all these translation rules on the same router. Basically you just use a sample number in the match pattern to test by specifying the translation rule number in the command and it shows you what the output ( replacement pattern ) will be. You can test it for all your translation rules like the following and check the output

router#test voice translation-rule 1 22272234

router#test voice translation-rule 2 2255667

router#test voice translation-rule 3 7100

router#test voice translation-rule 3 7100225566

You can try all combinations to see what these rules will do to the match pattern

For example, the following replaces the first occurrence of the number "123" with "456".

voice translation-rule 1
 rule 1 /123/ /456/  

Now, we test using the  test voice translation-rule command with different 'match patterns':

router#test voice translation-rule 1 123
Matched with rule 1
Original number: 123    Translated number: 456

router#test voice translation-rule 1 1234
Matched with rule 1
Original number: 1234   Translated number: 4564

router#test voice translation-rule 1 6123
Matched with rule 1
Original number: 6123   Translated number: 6456

[Inderpal Oberoi]

Hi

voice translation-rule 1
rule 1 /^2227\(....\)/   

The first part matches the pattern , ie any no beginning with 2227 followed by any 4 digits which are defined in a bracket as a subset 1.

This subset 1 is defined in the replacement pattern as /\1/.

Both match and replacement patterns are delineated by forward slashes.

The output of the above translation for a no like 22279090 will be 9090( which is a translated no )

Regarding the voice translation 3 , whatever it matches in the match pattern is not forwarded to the replaced pattern.

So , in your case it will match 7100 or 7300 and since there is nothing defined in the replacement pattern ie // it will be NULL in your case.So it there is anything defined after 7100 or 7300 will be forwarded to the replacement pattern ie 999 in your case.

For voice translation rule 2, it will match any number defined in the match pattern ie rule 1 /.*/

, and in the replacement pattern  /2227\0/ , you are adding 2227 as a prefix to that number defined by \0.

Eg 909090 will be translated into 2227909090

Regards

Inderpsi

[Deepak Rawat]

https://supportforums.cisco.com/document/31816/custom-made-guide-translation-rulesprofiles-and-some-common-uses

Regards

Deepak