There is general consensus that received capability sets should be treated as deltas (unfortunately H.323 is not really explicit about this). This certainly applies to the capabilityTable and CapabilityDescriptors elements in the TerminalCapabilitySet message, but does this also apply to the multiplexCapability? If I first send a TCS with a nonStandard element and then a TCS with a h225Capability element should this be treated as a delta or a replacement? If I send two TCSs, both with a h225Capability element, should anything that is present in the second, but not in the first TCS be "added" and anything that was present in the first but not present in the second be removed?

Regards,

Frank

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