AVM FRITZ! Fon MT-F cordless landline and Internet phone (VoIP, DECT) On 7.20.10 2 new terminals MT-F obtain detachment of 2 older Gigaset. Registration at Fritz! Box 7270 V2 with no problems. Unfortunately the terminals when pressing the call key or call a reset and log back in to the box on. After that you can make calls with reasonable quality, should not the caller previously abandoned. Far from mature technology still miles. Typical "Banana Technology", matures at the customer.
Update: In the meantime, with the latest firmware 1:02:39 running the phone with no problems