The new business phone systems, the ones that sit in the clouds called hosted IP PBX and are accessible remotely via smart cellphone, netbook, laptop, desktop or other user-held equipment, are one of the biggest proponents and reason for the popularity and expectation of HD voice quality and wide band audio. In fact, HD voice quality on VoIP results in better than that of cellular or landline traditional service. It is an important factor that is driving TDM to IP migration today.

Which IP PBX companies offer phones that can be configured to use the (wideband) G.722 codec on internal calls? Telephone equipment from Avaya, Cisco, Grandstream, Gigaset, Polycom (the one who brands wideband audio "HD Voice" seen as synonymous with wide band audio), Snom, Aastra, AudioCodes (which brands wideband audio "HDVoIP") and others take advantage of G.722 codec (for wideband audio), as well as even higher-quality audio components.

In fact, many readers have been using wideband audio without realizing it when calling from Skype to Skype on your PC, although making a SkypeOut call to a regular phone number does not. You can tell the difference when I am using Skype to Skype or Skype to PSTN (or VoIP on other platforms with or without HD) on my DIDX podcasts.

Want to experiment with HD Voice yourself?