When making voice calls via DVI on a GC864-QUAD-V2, the received audio always seems to be a mix of the remote callers’ audio and the out going audio.
For example, if I inject a music signal to the modules DVI Rx pin, I hear the same music signal on the DVI Tx pin with no network delay, mixed with the remote callers audio. I still hear the music if I mute the microphone on the remote callers handset. The DVI port is in slave mode, but the effect is the same if I set it to master mode.
The AT command reference lists modes for enabling/disabling sidetone on the handset and headset, but no command to disable it on the DVI. Is this normal for the DVI port, and is there a command to disable the loopback?
For reference, the module firmware is version 10.00.057 and the initialisation sequence is as follows:
I believ eyou are using the default value for hte AT#SHSSD parameters which is 1 so you have the sidetone enabled.
Can you please check it? and in affirmative case toggle it to 0 to disable it.
you can also disable the sidetone selecting n audio profile other than 0 ie
AT#PSEL=1 ( oe 2 or 3 )
The command to disable sidetone worked – thanks for your help
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