Automatic Logon

Hello,
We would like to automatically logon to many voip related hardware. This hardware have is own webinterface. The difficulty is that after connecting a windows security logon (popup) appears. After searching on the internet I saw the opportunity to use [url=http://[user]:[password]@[ip-adres]/]http://[user]:[password]@[ip-adres]/[/url]. How can we configure Remote Desktop Manager to ensure that we can automatically logon with this command or better logon credentials?
Ingrid