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ITU-T V.90
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ITU-T V.90
A digital modem and analogue modem pair for use on the Public Switched Telephone Network (PSTN) at data signalling rates of up to 56000 bit/s downstream and up to 33600 bit/s upstreamMore info
This Recommendation specifies the operation of a digital modem and analogue modem pair for use on the Public Switched Telephone Network (PSTN) at data signalling rates of up to 56000 bit/s in the downstream direction and up to 33600 bit/s in the upstream direction. The two modems are specified herein in terms of coding, start-up signals and sequences, operating procedures and DTE-DCE interface functionalities. The network interface of the digital modem and the signalling rate that is used to connect the digital modem locally to a digital switched network are considered to be national matters and are hence not specified herein.
| Author | ITU |
|---|---|
| Editor | ITU |
| Document type | Standard |
| Format | File |
| ICS | 33.040.35 : Telephone networks
35.180 : IT terminal and other peripheral equipment |
| Number of pages | 47 |
| Year | 1990 |
| Document history | |
| Country | International |
| Keyword | CCITT V.90;ITU-T 90;90;ITU-T V.90 |