mine question is, why there are no support for 'Set_G729_annexb: No' for SPA series gateways. That is SPA gateway violates RFC 3555 (dating back to 2003) in its G729 codec naming. Snippet from RFC:
MIME subtype name: G729
Required parameters: None
annexb: indicates that Annex B, voice activity detection, is
used or preferred. Permissible values are "yes" and "no"
(without the quotes); "yes" is implied if this parameter is
That is by not providing this optional attribute, G729 is considered Annex B. And accoring RFC theres no such mime name as G729a. Even more, i dont think that rtpmap attribute is of any use for codec G729 as it is only in 8khz.
As i understand other cisco equipment follows this RFC requirement also as SPA IP Phones do. Is there a change that this option will be added to SPA gateways? This would really help with G729 interoperability.
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