SummaryThis Annex describes an extension of Recommendation H.223. It defines specific adaptation layers to allow the use of H.324 terminals in highly error-prone transmission environments. These adaptation layers include specific options for H.324 terminals, e.g: • error detection and correction; • sequence numbering; • automatic repeat request; • retransmission capabilities (hybrid ARQ-type I & II); • segmentation procedure to transmit frames which shall be transmitted unframed; • support of framed in unframed transmission mode. |