Installation
BusinessPhone – Dialog 4425 IP Vision138
Install card
Use the Designation Card Manager to make and print your own 
designation cards. The Designation Card Manager is included on 
the Enterprise Telephone Toolbox CD or it can be downloaded 
from:
http://www.aastra.com
For questions regarding the product, please contact your Aastra 
Certified Sales Partner.
Install key panels
1 Remove the small plastic plate, marked DSS, i.e. with a 
screwdriver and connect the cable.