"This standard contains protocols for use between a DTE and a Facsimile DCE. It includes automatic calling and answering. This standard defines the commands that the DTE may issue to configure and control the DCE@ and the responses the facsimile DCE may issue to those commands. This standard is useful for intelligent DTEs and DTE software@ facsimile DCEs@ facsimile terminals@ and Multi-Functional Devices with digital connection to DTEs. This standard assumes that the DTE and DCE are connected via serial asynchronous connection using EIA??TIA-232-E (or ITU-TITU V.24) circuits. However@ the protocols defined may be implemented in any environment that provide a character serial bi-directional data stream@ including processor bus attached ""fax boards""@ local area networks@ Small Computer Systems Interface (SCSI@ ANSI X3.131)@ IEEE 1284 parallel ports@ etc. The adaptation of the protocols and procedures to these alternative communication schemes is for future study."