Dear editors! We think that the following references should be added: In all of H.323 standards reference to X.680 Amendment 1 (Rules of Extensibility) In addition in H.450.1 reference to X.681 Amendment 1 (Rules of Extensibility)

Orit Levin RADVision Inc. E Mail: orit@radvision.com 575 Corporate Dr., Suite 420 Tel: 201-529-4300 ext. 230 Mahwah, NJ 07430 Fax: 201-529-3516