Echo Cancellation +Echo; Side Tone Modification +Sidet - Multitech CDMA Wireless Modem Reference Manual

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
AT+ECHO?
Note: Read current settings
AT+ECHO=0
Note: Set Echo Cancellation Off
AT+ECHO=1
Note: Set Echo Cancellation to Ear Seal
AT+ECHO=2
Note: Set Echo Cancellation to Headset
AT+ECHO=4
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
AT+SIDET=1,0
AT+SIDET?
Note: Current value
Multi-Tech Systems, Inc. CDMA Wireless AT Commands - PN S000294C
Possible Responses
+ECHO: 0
OK
OK
OK
OK
OK
Possible Responses
OK
Note: Command valid
+SIDET: 1,0
OK
Note: Command valid
Chapter 5 – Call Control Commands
42