How to append work numbers to lync clients

Question

could anyone explain me how to set this up:
I have 2 users in a test environment
the standard for danish tel number seems to be eg. [phone]
i want to append 20304050 to user1 and 20304051 to user 2, with extension 9000 & 9001
what is the exact tel uri i need to use, and how do i set up nomalization for these to be able to call eachother, i have looked at various guides and examples, but i simply dont get the system behind. my goal is to be able to call out via enterprise voice.
any help would be greatly aprecciated.
my setup includes:
doman lynclab1.local
lync fe on 10.10.21.2
ad on 10.10.21.1
user1 on 10.10.21.3
user2 on 10.10.21.4
mediation with 2nics 10.10.21.5 & 192.168.1.8 for external access.
at this time i havent set up the pstn gateway, is this crucial for my users to call eachother by number internally, at this time im only able to call by username.

Answer 1

I would think:
tel:[phone];ext=9000
and
tel:[phone];ext=9001
Create a normalization rule like this:
Description: Extensions
Starting digits: 900
Length: Exactly 4
Digits to remove: 3
Digits to add: [phone]
With this, the users could call each other by dialing the extension, and outbound enterprise voice calls would look like the E.164 +45xxxxxxxx number.
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SWC Unified Communications
i have set up these parameters, but i am still not able to call between 2 internal users by using extensions. i havve also tried pushing the address book, without any result.