Trigger Call?

[CWR]

With that URL it still prompts for username and password.

I also did a Wireshark trace and when that string is sent to the phone it redirects to the logon page as well.

When you did it, is it possible you were already logged into the phone?

FORMS authentication is a FORM on screen.
-> http://en.wikipedia.org/wiki/Form-based_authentication

The T38 under V70 and prior showed a pop-up dialog box for authentication.
-> http://en.wikipedia.org/wiki/Basic_acces...entication