Note 1: The Implementers Guide must be read along with the standards. Important ITU-approved corrections are found in those documents. For some standards, the ITU-T has published Amendments and Corrigendum documents that must also be read with the standard. Please refer to the ITU-T Recommendations Page. Note 2: Compiling the H.225.0 ASN.1 also requires the associated H.245 and H.235 file.