The audio quality of High Definition Sound Performance (HDSP) can make your internet phone calls sound more like face-to-face chats. Thanks to a frequency band twice that of standard phones, Gigaset's HDSP phones let you experience internet (VoIP) conversations in unparalleled sound quality. This extended frequency range means HDSP calls can transmit more audio details than ever before, eliminating much of the static and interference common to normal phone calls. As a result, you can hear every inflection in the voice of the person you're talking to – and experience calls that sound more like face-to-face conversations.

What product do you need to have HDSP? You'll first need a Gigaset HDSP capable cordless phone, such as the Siemens Gigaset S675 IP. You can then plug your phone into a router, such as the Siemens Gigaset SE366 WLAN, which in turn connects to your broadband internet connection. You'll then be able to phone with a friend or family member who also has an HDSP capable phone – and talk to them in unrivaled sound quality. You then may expand your phone system with the Siemens Gigaset SL37H.

Experience HDSP: Sound check

...all about HDSP can be found here: Siemens Gigaset Sound