The generic extensibility framework (GEF) concept is described in ITU-T Rec. H.323, and the corresponding data fields are formally defined in ITU-T Rec. H.225.0. Individual feature specifications define the meaning and content of those fields for specific
ITU-T SERIES H SUPP 4-2007 history
2011ITU-T SERIES H SUPP 4-2011 Repository of generic parameters for ITU-T H.460.x sub-series Recommendations (Study Group 16)
2010ITU-T SERIES H SUPP 4-2010 (Pre-Published) Repository of generic parameters for ITU-T Recommendations H.460.x sub-series
2007ITU-T SERIES H SUPP 4-2007 Repository of generic parameters for ITU-T Recommendations H.460.x sub-series Study Group 16
2006ITU-T SERIES H SUPP 4-2006 Repository of generic parameters for ITU-T Recommendations H.460.x sub-series Study Group 16