Does anyone know wich NVM to adjust to change the fax start speed on a altalink? (sending speed..)

At the 78xx it can be done on the device in fax options, the new altalink does not have this option/ tab.

I called support desk but the wil not help me with this because they only support "100% analog lines".

On the 78xx everything worked fine until the new 8035 arrived..3 out of 5 faxes will not be send..

Turning off ECM did not resolve the problem either..this is only for receiving faxes i guess.

Thank you in advance