Best practice: international phone numbers

[Alexey Smirnov]

Are there any best practices regarding how to format phone numbers in
Address Book within international company?

I'm interesting about most compatible (and clear) format (if any) for users
accross the world, especially for mobile users with PDA/Goodlink

Today I have

+9(999)999-999-99
009 999 999 99
999.999.99
+99 (0) 999-999-99
999.999.99 ext. 9999

and this is what I want to standardize somehow.

Thanks.

 

[Peter Marchert]

This format is international standard: +99 (999) 99999 and is the best
way to sync with mobile devices.

Please pay attention of the space before "(" and after ")"

Peter