The phone is likely to be very good, but I could not try it. First lacks a power supply unit supplied, as there is also the Stomrversorgung over the Internet option. But that does not have a normal telephone connection merstmal. The power supply will cost nochmnals 10-20. Then, unfortunately, I could not operate at a Speedport 724 phone. The connection to the Internet goes, IP is also displayed, but you can not set up your phone. This is evident with the Speedport not possible have such gefundne in other forums. Very unfortunate. If that were angegen precisely on the product pages, I would have saved a lot of trouble and expense Mitr. Thus, if an error or lack of speed ports and the lack of information from the Yealink it.