Multi-Tech Systems CDMA Wireless Modem Echo Cancellation +ECHO, Side Tone Modification +SIDET

Chapter 5 – Call Control Commands

Echo Cancellation +ECHO

Description: This command is used to enable, disable or configure the Echo Cancellation functions for voice calls (in rooms, in cars, etc.). The +SPEAKER function automatically sets echo cancellation based upon handset or headset choice and this command allows non-standard operation.

Values:	<mode>
	0: Vocoder Echo Cancellation Off
	1: Ear Seal Echo Cancellation
	2: Head Set Echo Cancellation
	3: AEC
	4: Speaker Echo Cancellation for car kit operation
	5: Default Echo Cancellation for current path settings
Syntax:	Command syntax: AT+ECHO= <mode>
	Command	Possible Responses
	AT+ECHO?	+ECHO: 0
	Note: Read current settings	OK
	AT+ECHO=0	OK
	Note: Set Echo Cancellation Off
	AT+ECHO=1	OK
	Note: Set Echo Cancellation to Ear Seal
	AT+ECHO=2	OK
	Note: Set Echo Cancellation to Headset
	AT+ECHO=4	OK
	Note: Set Echo Cancellation to Handset

Side Tone Modification +SIDET

Description: This command is used to set the level of audio feedback in the speaker (microphone feedback in the speaker).

Values:	<val1>
	0: Sidetone is disabled
	1: Sidetone is enabled
	<val2>
	0: No side tone
	1: Handset Sidetone levels
	2: Headset Sidetone levels
	3: Max Sidetone level
Syntax:	Command syntax: AT+SIDET=<val1>,<val2>
	Command	Possible Responses
	AT+SIDET=1,0	OK
		Note: Command valid
	AT+SIDET?	+SIDET: 1,0
	Note: Current value	OK
		Note: Command valid

Multi-Tech Systems, Inc. CDMA Wireless AT Commands - PN S000294C 42