I have a Siemens OptiPoint 400 Standard (v 3.0) IP phone. It originally came with HFA software (Siemens' take on h.323) however I have changed the application software to a SIP image. Now that my testing and experimenting is complete I would like to change it back to HFA. So far this has proved to be quite the task.
Does anyone out there have any insight to how I can change from a SIP image back to an HFA image? Since this was originally an HFA phone, is there some kind of factory reset procedure?
Any help would be fabulous. electricsuit at yahoo dot com