When I connected the phone, immediately fell on my poor voice quality. The voice of the other person sounded muffled and distant like a international call in the eighties. It can not be described other than unabashedly that Siemens is the audacity, with a "great sound" referencing ([...] And, although already many reviewers and test reports had pointed to just this state of affairs. But beyond that has much more annoyed the following: The quality of the AB was so miserable (noise, distortion, unpleasant Hall) that the message they leave frequently was hard to understand - especially when the speaker is equipped with a slightly softer voice. An email to the Siemens support was nearly two weeks unanswered, so I had however already left to go back to the phone Amazon. Anyway, I was told that these problems could possibly have to do with the voice quality by connecting to an ISDN system. For me this is a really very unsatisfactory answer: On the one hand, because it was purely say anything about whether this problem is to fix or not. One is as it were left out in the rain with the information easily. Fortunately, I had returned the device in time. Secondly, because in the product description there was nothing to read of a possible incompatibility with ISDN. Especially as far my old (also analog) Schur loose telephone with ISDN wonderfully harmonized. The only advantage of the Eco mode plus has to be mentioned, is intended to reduce the transmission power of the base and mobile device close to 100% (I also find this Siemens formulation is a spongy) - which is why I wanted to scrap my old phone. In conclusion: I hope that the market will provide Siemens for such a misconstruction and especially for the non-transparent handling of it a tangible lesson.
