I have the device as a "third-phone" through A / B converter on the ISDN -. Plant The big advantage is that the device requires no power supply, another cable is thus spared. The display is easily legible even in my opinion from an angle. And that after separation from the telephone network or power failure the first handset to be lifted for 5 seconds is really no big deal. The choice of ringtones is, however, very modest, but sufficient for my purposes by today's standards. The only downside, but that is not on the phone: The already older A / B - converter (TA 2a / b comfort of Telekom) can not pass through the Caller ID, so this feature can not unfortunately be used. But to "normal" connection it works fine (tested at a neighbor).
