T46S auto redial does not work / Broadsoft

[hinken]

Hi,

I`m trying to get the auto-redial function to work.
The phone is a T46S, FW66.84.0.86 (I also tried .90)
The phone system is broadworks.

When the called party is busy the phone detects that correctly and also offers to auto-redial the number. After confirming the speaker stays active and after counting down it seems the phone seems to start to redial but nothing more happens. The screen shows the number and the animated >>>>>>> below - so it looks like the phone is dialing but nothing happens.
Looking at the last dialed numbers within broadsoft the second try isn`t in the list so I guess the call didn`t reach the platform.

Can anyone help me to get it to work?

Many thanks