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This 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.
| Author | ITU |
|---|---|
| Editor | ITU |
| Document type | Standard |
| Format | File |
| ICS | 33.080 : Integrated Services Digital Network (ISDN)
35.180 : IT terminal and other peripheral equipment |
| Number of pages | 6 |
| Modify | ITU-T T.90 (1992-02)
|
| Year | 1990 |
| Document history | |
| Country | International |
| Keyword | CCITT T.90;CCITT T.90 AMD 3;ITU-T T.90;ITU-T 90;90;ITU-T T.90 (1992) AMD 3 |