Qualcomm GSP-1620 specifications AT Command Processing Modes

Integrator’s Reference Manual

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AT Command Processing Modes

Data services AT command processing consists of three modes:

•Command mode — While in the Command mode, data service is inactive and the DCE processes AT commands received on the Rm interface.

•Online mode — Online mode is entered when a data connection is established and data service becomes active. While in the Online mode, the DCE does not recognize AT commands on the Rm interface, but does process in-band control data and software flow control data.

•Online-Command mode — During Online-Command mode, data service is in the active state, although data is not processed. The DCE processes all AT commands received on the Rm interface while in Online-Command mode.

Steps	TO ENTER ONLINE-COMMAND MODE FROM ONLINE MODE
	■ Use an in-band control data escape sequence, “+++”
	surrounded by guard time (see Change from Online to
	Online-Command Mode (+++) on page 6-40).
	or
	Turn OFF the Rm interface DTR (circuit 108/2) signal
	(see DTE Data Terminal Ready Behavior (&D) on page
	6-16 for details).

	Steps	TO TERMINATE A DATA CALL FROM ONLINE-COMMAND MODE
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2		■ Use the ATH command (see Hook Control (H) on page
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		6-22).

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