[VoiceOps] ATAs with CAT-iq and HD codec support

Michael Graves mgraves at mstvp.com
Wed Sep 21 20:38:29 EDT 2011

HDVoice is a topic quite close to my heart. I've been following some
recent developments that may be of interest.

First, the idea of an ATA that is G.722 (or otherwise HDVoice)
capable=0Ais a little odd. Anything that would connect via RJ-11 would,
by=0Adefinition, be built to PSTN standards and so NOT capable wideband

Passing wideband to the PSTN would actually cause problems.
Everything=0Awill filter the analog audio to meet the 3.4 KHz passband
specified for 8 KHz sampling.

However, Arris Corp claims that their cable CPE could be HDVoice
capable=0Awith just a firmware upgrade. That CPE only provides an
analog RJ type connection to the customer.

Gigaset has stepped up and said that their DECT systems could,
again=0Awith a firmware update, accept wideband analog audio via the RJ

This means of taking cable customers to HDVoice could be cheaper than
the other commonly suggested approach, which is to add a DECT/CATiq
base radio to the cable CPE. That would mean rolling out large numbers
of new CPE, at considerable cost.=0A=0ACable Labs have included
DECT/CATiq in their ercent specs, providing a formal standard-based way
to add HDVoice capability in cable CPE.

Here's some related resources:


On Tue, 20 Sep 2011 21:05:24 -0500, Frank Bulk wrote:

>Can anyone recommend any ATAs with CAT-iq and HD codec support?  We're
>thinking of a voice application for residential users that would offer
>HD-quality voice.  I'm told that traditional analog phones are insufficient,
>and it appears that the best method for providing HD voice is either native
>IP to the phone or DECT's CAT-iq.
>VoiceOps mailing list
>VoiceOps at voiceops.org

Michael Graves
sip:mgraves at mstvp.onsip.com
skype mjgraves
Twitter mjgraves

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