X.445 The X.445 is an ITU-T standard for sending X.400 traffic over standard telephone lines, a method known commonly as dial-up. It is also known as the Asynchronous Protocol Specification (APS).[1] See alsoITU-T, a list of current ITU-T standardsReferences ^ https://www.pcmag.com/encyclopedia_term/0,1237,t=X445&i=54961,00.asp [dead link]
