[TrunkCom] partial encryption and if so how is this possible?

[Gary Hahn]

It's actually quite common, even on encrypted analog channels.  The
receiving end will receive whether it's encrypted or not...the radio figures
it out. (not unlike the BC796D figuring out if a transmission is P25 or
analog)  So if I have mine set to encrypt and you do not, we can still hold
a conversation.  I think both the transmitting and receiving parties
typically have indicators on the radio telling them whether encryption is
being used or not, since I've heard receiving parties warn transmitting
parties that they're in the clear.

> 
> 
> Good morning to all on the list.  I have noticed that when 
> listening to conversations on Michigan.s digital 800 MHz 
> system (MPSCS) there have been times where conversations are 
> partially encrypted.  This morning I heard what sounded like 
> some kind of road commission or something, but one side of 
> the conversation was clear and the other was encrypted.  I.ve 
> never known any system to do this, and the person who was 
> clear wasn.t asking the person who was encrypted for a 
> retransmit or anything.  As I said I only got to listen to 
> this for a few minutes and couldn.t guess on what the agency 
> was, but I found this to be strange.
> 
>