this feature is available in Zoiper Classic Biz.
The feature is available in Zoiper Classic and is called "Associated Phone"
1. What is the Associated Phone feature?
The associated phone feature is a special feature making the Outlook implementation even better.
You can use Zoiper to make your Deskphone dial your Outlook contacts.
2. How to setup an associated phone with Zoiper Classic?
Start Zoiper Classic and your Outlook.
Open the Zoiper Options Window, go to the list of accounts and select "extras" for the chosen account.
Enable the "Use Associated Phone" checkbox and enter the Associated extension in the blank field.
3. How to use the Associated phone feature?
Start your Outlook.
Open the addressbook and select a contact. Right click on the chosen contact. The drop-down menu will appear. When you chose to dial an Outlook contact via Zoiper, you will see another menu. You can choose between dial via Zoiper, or to use the associated phone. If you choose to use the associated phone, Zoiper will first call your associated phone and when you answer that call it will transfer the call to your contact.