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Micronas keyboard controller enables desktop VoIP

Posted: 07 Feb 2003 ?? ?Print Version ?Bookmark and Share

Keywords:micronas? uac 3556b? usb keyboard controller? desktop voip? real time communications?

The UAC 3556B USB keyboard controller from Micronas GmbH is designed to enable desktop VoIP by integrating an additional audio channel directly into existing keyboard architectures.

Following Microsoft's Real Time Communications protocol, the keyboard controller creates a dedicated audio channel completely independent from the sound card. This establishes a separate line for VoIP functionality, minimizing interference generated by PC audio signals such as voicemail notification and gaming sounds.

In addition, integrating the audio channel directly into the keyboard allows easy user-access to a more complete range of functions. "By putting an external audio channel into the keyboard, in closer proximity to the user, the UAC 3556B delivers greater audio functionality and control," said Kai Scheffer, director marketing and multimedia products at Micronas. "Its compatibility with existing PS/2 keyboard standards also gives manufacturers the flexibility to quickly upgrade to a full USB architecture."

The controller features a USB interface; a digital processing unit with a stereo DAC and ADC for direct interface between audio devices such as microphones, loudspeakers, and headsets; and a PS/2 bridge interface for keyboard control functions.

The UAC 3556B comes in three packages: 44-pin PMQFP, 64-pin PMQFP, and 64-pin PQFN, and will sell for <$4.

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