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Our client wants the VVX 1500D to connect to external h.323 video endpoints and internal SIP video endpoints while only using SIP for audio. Can the dual stack VVX support both h.323 and SIP for Video whereby the CODEC can be set on a per call basis, or is the dual stack confined to a preset CODEC configuration whereby h.323 is the only CODEC used for video if configured as such?

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