ME310G1/ME910G1/ML865G1 AT Commands Reference Guide
80617ST10991A Rev. 11 Page 49 of 1039 2021-09-23
General Control and Config
3.2.1. Command Line Prefixes
3.2.1.1. AT - Starting a Command Line
AT is the prefix used to start a command line.
ITU-T Recommendation V.25 ter
3GPP TS 27.007
AT
The prefix AT is a two-character abbreviation ("ATtention"), always used
to start a command line to be sent from TE to TA, with the only exception
of AT#/ prefix. As a command, it can be issued just to test if the device is
responding to AT commands.