[asterisk-users] Rewrite Outgoing Number

[basti]

Hello,
I am new on asterisk and do some tests on freepbx.

I have 2 SIP provider:

Provider1: In-/Out- Flatrate, only 1 Number
Provider2: Incoming Flatrate, Outgoing Cost depend on destination, 3 numbers

On Asterisk site i have 3 phones
(branch ??, don't know how its called in asterisk)

Is it possible to do something like:

Phone 1: Incoming Call: Number1/Provider1 Outgoing Call: Number1/Provider1
Phone 2: Incoming Call: Number1/Provider2 Outgoing Call: Number1/Provider1
Phone 3: Incoming Call: Number2/Provider2 Outgoing Call: Number1/Provider1

Best Regards,
Basti