This amendment comprises the following changes:
a) The T.30 Indicator is mandatory.
b) Annex B is modified to clarify the TCP Start-up.
c) The ASN.1 text in Annex B is removed. A reference to ITU-T H.245 V7 replaces it.
d) ITU-T.38 version number is 2, and the table introduced in Amendment 3 is updated.