The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of the International Telecommunication
Union. The ITU-T is responsible for studying technical, operating and tariff questions and
issuing Recommendations on them with a view to standardizing telecommunications on a worldwide basis.
The World Telecommunication Standardization Conference (WTSC), which meets every four years,
established the topics for study by the ITU-T Study Groups which, in their turn, produce Recommendations
on these topics.
ommendation H.323 was prepared by the ITU-T Study Group 15 (199x-199x) and was approved
by the WTSC (Place, Month xx-xx, 199x). ...展开详情收缩