Actually it’s one of the latest 1.2.0 revisions – b653c21.

I didn’t realize that with the quick look I had at the code.  Curious… that makes me wonder if the Aastra phones are generating the noise when they don’t see any media.  A user complained about hearing the noise when first logging into voicemail, before she is asked for her PIN.  I hadn’t noticed it before because I normally do that on speaker but on the handset, it is quite noticeable.

Is there a way to use send_silence_when_idle without having it kill ringback when set to a non-zero value?

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Anthony Minessale
Thu May 17 20:21:35 MSD 2012

Which revision of the code are you looking at?

The sleep sends dummy frames unless you set that

send_silence_when_idle var, if its not set its probably not sending

anything.

You can see in the code that unless that var is set it wont be

generating anything.