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Radio vs dsdplus

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rad_ref

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Dec 8, 2017
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As I understand ex. GD-77 is not able to hear the audio belongs to system where RAS has been implemented. Well, how it is possible that ex. dsdplus is able to hear that (grabbled voice) while every radio, including GD-77, not?
 

RayAir

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Dec 31, 2005
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RAS is not a form of voice privacy.
It just prevents unauthorized radios w/o the proper RAS key from accessing the system.

A simple way to describe it is any real radio attempting to listen to a RAS enabled system will not unmute because the packets will fail the CRC and thus will be dropped.

DSD doesn't care about the CRC and simply decodes the voice frames.

RAS provides limited protection from eavesdropping. If someone is concerned about this voice privacy needs to be enabled also.

If voice privacy is enabled DSD+ will still play the voice frames, but the audio will be garbled and not intelligible.
 

rad_ref

Newbie
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Dec 8, 2017
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Well, why does DSD+ do not care about CRC while every radio do? And vice-versa, why there is not any radio which also would not care about CRC?
 
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