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What format should phone numbers in the Active Directory User Object be ?

Hi,
In the Active Directory User Object what format should the phone numbers be to ensure Outlook and Microsoft Lync are able to dial all local and international numbers ?  Regardless of user location / country ?

Is it the full international format that Outlook uses ? i.e.
A US number should be:
+1 (636) 722-3437

An Australian number should be :
+61 (2) 9466-3814
MichaelGreenActiveDirectoryPhone.jpg
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Michael Green
Asked:
Michael Green
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1 Solution
 
Michael GreenSenior IT Consultant / IT Project ManagerAuthor Commented:
These are the phone number fields I'm referring to :
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Cliff GaliherCommented:
Conform to E.164 formatting and you will be fine. Separators are a personal preference, andnseveral are in the e.164 spec. Use what you are comfortable with.

But always use e.164. Don't add country routing, or trim country codes themselves. ise normalization rules in the dialer for that instead.
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Michael GreenSenior IT Consultant / IT Project ManagerAuthor Commented:
Thanks cgaliher.  Where do I find the official documentation on E.164 ?
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Cliff GaliherCommented:
E.164 is an ITU standard so their website is a good start. Specific formatting is rather vague (see e.123 for that) so i'd also recommend referring to your dialer's documentation send choose a format that is comfortable. Lync, for example, has thorough documentation, but acceptable characters vary slightly from 3CX or asterisk.
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Michael GreenSenior IT Consultant / IT Project ManagerAuthor Commented:
Can you provide a URL ?
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Cliff GaliherCommented:
Since I am on my phone??

Sure...

www.bing.com and search for ITU E.164
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Michael GreenSenior IT Consultant / IT Project ManagerAuthor Commented:
Gee that was helpful...;).

Here are the links I think are the correct ones:
http://www.itu.int/rec/T-REC-E.164/en

E.164 : The international public telecommunication numbering plan :
http://www.itu.int/rec/T-REC-E.164-201011-I/en

Specific English PDF:
https://www.itu.int/rec/dologin_pub.asp?lang=e&id=T-REC-E.164-201011-I!!PDF-E&type=items
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Michael GreenSenior IT Consultant / IT Project ManagerAuthor Commented:
That said, I'm having trouble finding where it says that all phone numbers should have the + sign in front of them to be in 'international format' i.e. able to be dialled to/from anywhere.........
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Cliff GaliherCommented:
I believe that is actually E.123
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Michael GreenSenior IT Consultant / IT Project ManagerAuthor Commented:
E.123 : Notation for national and international telephone numbers, e-mail addresses and web addresses

http://www.itu.int/rec/T-REC-E.123-200102-I/en

Section:
2 Notation for National and International Telephone Numbers

7 Procedural symbols

7.1 International prefix symbol
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Michael GreenSenior IT Consultant / IT Project ManagerAuthor Commented:
Thanks cgaliher !
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Michael GreenSenior IT Consultant / IT Project ManagerAuthor Commented:
That would seem to confirm to me that all numbers entered in the AD User object in an international company must compy with these ITU standards to be diallable.

Does anyone else have any comments ?
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Seth SimmonsSr. Systems AdministratorCommented:
This question has been classified as abandoned and is closed as part of the Cleanup Program. See the recommendation for more details.
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