Reviews:
 ·Junction Networks
2 edits | reply to Telco
Re: Gigaset US Update said by Telco:The question is which voip providers support G.722 (HD voip) Now that is a curious question. So easily posed, yet so complicated to answer. Many facets to be considered.
Most commercial ITSPs primary service offering is connection to the PSTN. By definition, regulation and very possibly by law, the PSTN cannot pass wideband calls. There are ITU regulations that force filtering to ensure no energy content beyond that possible using G.711.
Only when calls completely bypass the PSTN will you achieve a wideband call. That becomes the defining thing about wideband in many ways.
Any SIP based provider who does not stay in the media path may support G.722 wideband. For example, you can sign up and account with Gizmo5 and use the Gigaset hardware to access that account. If you call other G.722 capable phones you will get a wideband call.
Using Gizmo5 you can call by SIP URI which means that you can call any SIP based provider by a pure IP pathway. However, the Gizmo5 soft phone client does NOT support G.722.
Myself I use Junction Networks/OnSIP and it supports G.722 for calling. I say for calling because things like VM, IVR prompts or conference bridges may not support wideband, even though normal calling between phones does.
FWIW, FWD supports G.722. In fact, it's about their only reason for being anymore. If you pay the annual fee you get a SIP URI that will handle your HD calling easily.
I have tried SIPGate with G.722 and I can't make that work. They claim to support G.722 for calls between accounts when an advanced compatibility setting is enabled.
I tried to call another user who had an IP650 registered but it did not connect in wideband. More testing & a SIP trace is required to know whats going on there.
Incidentally, part two in my series on "Making Use of Wideband Voice Right Now!" posted today:
»www.mgraves.org/voip/2009/06/mak···-gizmo5/
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Michael Graves
Houston TX
»blog.mgraves.org |
