We are working on an automatic call clear-down application for voice calls, and need to know if it’s possible to detect a period of silence from the far end during a voice call, similar to (or perhaps using) the H24 +FRS command.
We need to do this to initial a call clear-down if the called end party goes on-hook (UK exchanges allow this to be treated as a call on hold)
Is a silence possible to detect, or do we need to detect it external to the module?
We are using a GE865.
Isn’t the AT+FRS command a fax thing, not voice? GE865 has it implemented too.
Something simple on the audio line like a rectifier then a voltage comparator would do the trick I suppose?
Thanks, yes, it is a fax thing, but we need similar functionality, or for +FRS to work in voice mode (I’m not hopeful)
Alternatively, we can threshold something on the audio line, yes.
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