Excellent Sound, Oki Electric Industry's proprietary IP phone (VoIP) technology, makes it dramatically easier to discern callers than is possible with conventional phones. Conversations sound as if you're in the same room as the caller.

Because conventional phones can transmit only a narrow frequency band, audio quality of telephone calls was limited. Oki Electric Industry developed Excellent Sound, a technology that is capable of transmitting a much wider range of audio frequencies, to deliver the kind of high-quality sound made possible by IP phone technology.

Conversations between telephones that support Excellent Sound are vastly easier to understand than conventional phones, allowing nuances of pronunciation and meaning to communicate with accuracy and clarity.