I have been fighting for half a year with me and yet ordered this device in the end. I can only say that all negative here and commented elsewhere properties meet I do not think about.
The only thing you can complain directly to the device is a bit wobbly keyboard for entering numbers, which with the other Gigaset quality nothing in common, as each stone old Gigaset is much better.
The device was within 70 minutes (including the time for the swearing of manual, the "dumb" and not properly reading the instructions) unpacked, installed, connected, even two handsets were the same as connected. No, am not an electrician or technician, but a bureaucrat.
It was connected to a Speeport W 723 and directly to ISDN.
Who dreams for so little money from noblest, goldklunkerbehangenen tech equipment, should be for something else.
Previously I had a telephone system for 6,000 euros with 3 extensions apparatus that has kept 14 years without any problems, .... what they should, but it's just getting old.
The Gigaset DX800A can hold more and it is for small and medium offices TOP and perfectly adequate, very many settings, you have to stop to get used only to drahltosen extension phones, but you can indeed choose according to his needs.
As a top product of handsets the 810H has emerged, the interlocutor opposite does not notice if you are in hands-free mode or normal phone, the device can forget additional hands-free devices. In contrast, the mobile phone similar 910H is rather unwieldy.
Sure, some subtleties I have to adjust, ......
I will in a few weeks even bring a Ergäzungskommentar,
many greetings
JS