G.722

VoIP Users Conference Friday, Nov 7: Wideband Telephony

What’s Happening This Friday?

The VoIP Users Conference weekly call on Friday, November 7, 2008 is all about wideband telephony. That is, using VoIP to deliver call quality vastly superior to the normal public telephone network (PSTN.) Our guest will be David Frankel, CEO of ZipDX, a commercial conferencing service that is specializing in wideband conference calling for businesses.

As usual anyone may join the call which gets underway at 12 noon EST on the Talkshoe conference service. That conference service can be reached by dial-in over the PSTN or by SIP URI. Details on how to connect to Talkshoe by various means can be found here.

For this one call only we will also be using the ZipDX wideband conference bridge. ZipDX and Talkshoe will be connected so that everyone will be on the call. Anyone connected to the ZipDX bridge using a suitable phone will be able to experience the call in G.722-based wideband quality.

Everyone else will experience the normal G.711 based narrowband conference quality that we all know and (despise) love.

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VoIP Users Conference Nov 7: HD Conference. Are You Ready?

This Friday’s edition of the weekly VoIP Users Conference call  is all about wideband audio (aka HD Voice) as mentioned in my review of the Polycom IP650 / 550 SIP phones back in August.

The guest for this call is David Frankel, CEO of ZipDX a commercial service that specializes in wideband conferencing. We expect an interesting call touching on many aspects of VoIP going beyond the traditional phone service, conference bridges, technical standards, device compatibility, etc.

The conference call will be held as usual on the Talkshoe service for people calling in from normal phones. Anyone with G.722 capable phones (Polycom, Snom, Cisco, Avaya, Mitel, Grandstream) or a G.722 capable soft phone (Eyebeam) will be able to connect to the ZipDX conference bridge and participate in glorious wideband audio.

The two conference bridges will be connected. People connected to ZipDX directly will be able to hear the startling difference that HDVoice makes. This is especially true in conference calls where line quality, accents and background noise all cause intelligibility issues. The downloadable recording of the conference will let everyone hear the difference for themselves.

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Wideband Audio In Gizmo5

The past couple of days I’ve been playing around with the Gizmo5 client on my desktop. It’s actually pretty slick. I wanted to see if I could pass a wideband call to/from Gizmo5 from my Polycom 650s or Eyebeam. So far no joy. There seems to be a problem completing a call from Gizmo5 to OnSIP via SIP URI. The call rings on the IP650 but cannot be answered. Not certain if its an issue with Polycom firmware or both devices being behind the same NAT and trying to connect directly. I’ll try and work that out when I’m back at home.

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Soft Phone Quest: EyePMedia Communicator

Beyond merely satisfying my curiosity I have a legitimate need for a handful of soft phone licenses. In my day job we have a small group of staff that travel a lot. Some have recently found that soft phones, typically Skype, or X-Lite can be handy and cost-effective of staying in touch with the office or home while on-the-road.

A few of these UK based staffers have even purchased Siemens S685IP SIP/DECT phones for their homes. They use these to connect to our US hosted IP-PBX infrastructure in those cases when then they are providing after hours support to North American customers. The S685IP is nice because it supports wideband audio via G.722. In providing these people soft phones I’d like to leverage G.722 so that their IP calling experience is truly better than using their cell phones as well as cheaper. So I continue to seek out G.722 capable soft phones.

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