ME310G1/ME910G1/ML865G1 AT Commands Reference Guide
80617ST10991A Rev.4 Page 111 of 545 2020-04-15
3.1.5.3. ATO - Return to ON-Line Mode
This execution command is used, during a suspended data conversation, to return in on-line mode from
command mode. If there is no suspended conversation, it returns NO CARRIER.
After issuing ATO command, the device returns in on-line mode. To enter again
command-mode you must issue the escape sequence, see register S2.