When your service is activated, you will be sent an email containing various pieces of information including your Voice Portal telephone number.  The Voice Portal extension is typically the last four digits of your telephone number.

If you misplace the initial activation email, contact your site administrator for assistance. 

 

Link to: http://altusuc.com/wp-content/uploads/2015/02/Altus-Voice-Portal-QRG-R15.pdf