[Asterisk-Users] Extens and number converting so that i can dial following one standaard.

[Johannes van Hulst]

For asterisk I am using more than one sip providers.
The provider in Holland would like to have the international calls like 
00 31 20 1234567 but the provider in the US likes it like 0011 31 20 1234567

Can I make a rule in asterisk so that I can dail 00 31 20 1234567 and
asterisk dails 0011 31 20 1234567 to the US provider?

Greetings Han