Something like this might do it... ;)

<?xml version="1.0" standalone="yes"?>
<!-- SIP Enable HD Audio(G.722) on non-HD Polycom Phones -->
<!-- Discovered by Cherebrum -->
<!-- $RCSfile: hdaudio.cfg,v $  $Revision: 1.0 $ -->
<hdaudio>
   <voice>
      <codecs>
         <preferences voice.codecPref.Lin16="5" voice.codecPref.G722="1" voice.codecPref.G711Mu="2" voice.codecPref.G711A="3" voice.codecPref.G729AB="4" voice.codecPref.IP_300.G711Mu="1" voice.codecPref.IP_300.G711A="2" voice.codecPref.IP_300.G729AB="3" voice.codecPref.IP_4000.G711Mu="1" voice.codecPref.IP_4000.G711A="2" voice.codecPref.IP_4000.G729AB="" voice.codecPref.IP_650.G711Mu="2" voice.codecPref.IP_650.G711A="3" voice.codecPref.IP_650.G729AB="4" voice.codecPref.IP_650.Lin16="5" voice.codecPref.IP_650.G722="1"/>
         <profiles voice.audioProfile.G711Mu.payloadSize="20" voice.audioProfile.G711Mu.jitterBufferMin="40" voice.audioProfile.G711Mu.jitterBufferShrink="500" voice.audioProfile.G711Mu.jitterBufferMax="160" voice.audioProfile.G711A.payloadSize="20" voice.audioProfile.G711A.jitterBufferMin="40" voice.audioProfile.G711A.jitterBufferShrink="500" voice.audioProfile.G711A.jitterBufferMax="160" voice.audioProfile.G729AB.payloadSize="20" voice.audioProfile.G729AB.jitterBufferMin="40" voice.audioProfile.G729AB.jitterBufferShrink="500" voice.audioProfile.G729AB.jitterBufferMax="160" voice.audioProfile.G722.payloadSize="20" voice.audioProfile.G722.jitterBufferMin="40" voice.audioProfile.G722.jitterBufferShrink="500" voice.audioProfile.G722.jitterBufferMax="160" voice.audioProfile.Lin16.payloadSize="10" voice.audioProfile.Lin16.jitterBufferMin="20" voice.audioProfile.Lin16.jitterBufferShrink="500" voice.audioProfile.Lin16.jitterBufferMax="100" voice.audioProfile.Lin16.frequency="16000" voice.audioProfile.Lin16.payloadType="117"/>
      </codecs>
     <handset voice.handset.wideband="1"/>
   </voice>
</hdaudio>


On Tue, Jan 27, 2009 at 2:17 PM, peder@networkoblivion.com <peder@networkoblivion.com> wrote:
> Codec Options*
> G.711 Codec, G.726, G.729AB, G.723.1A, G.722 wideband codec
>
> Speex is not listed, so Polycom can't do Speex.
>
> I should note that even the non-HD Polycom phones have this same chip
> and are capable of doing G.722 some some config tweaking. ;)

Are you saying that you have actually gotten the non-HD versions to do
g.722?  Or are you saying that one might be able to do this?  If the
former, can you share what you did?

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