ISDN telephone without power supply and batteries

Have the phone purchased in January and since then in use. It should be emphasized that this does not require power supply and batteries, because the power supply via the telephone line - with me from the Fritz box of - takes place. The display is also unlit legible and is well lit as soon as the receiver is picked up or the menu will be served. The functionality of the phone does not lack anything, the handset is comfortable to hold and also I find the design appealing.

In the menu you will find it after a short time - even without manual - along well. Entering the telephone register is self-explanatory, the name input works like a cell phone keypad. From the registry entries of the name of the caller, otherwise the number in the display. Visible from a distance indicator lamp blinks when new messages on the Answering Machine are. To listen to the ABS is then to press "Play" button, only the "records" and. About the "Call list" key can be unceremoniously all missed calls, even those who have not leave a message, all with phone number or name. The voice quality I find very good.

Overall, however, the phone has only 10 basic ring tones. It can be assigned to different but MSN Distinctive Ring. Also listening is very quiet and ok only on loudest level

I have connected the phone to the ISDN starting my Fritz box 7170, which depends on an analogue telecom service connection. The decorated in the Fritzbox MSN 1 is hereby recognized by the phone immediately, the other MSN could be set up without any problems on the phone. Since I am very satisfied with the telephone, I also have 290 connected via a BTR ISDN adapter without termination resistors on the same ISDN starting the Fritz box the Tiptel without AB (as the same ringing second phone). This works for over 3 months with no problems, though AVM had declared this expressly for installation impossible. At the 3 analog connections the Fritz box 3 analog phones connected to the children who own numbers were assigned to each of the Fritz box over the menu.