[App_rpt-users] Local squelch tail problem clarification. (copy of message to Ken) for comment.

Stephen Rodgers hwstar at rodgers.sdcoxmail.com
Sat Jan 22 13:23:06 EST 2011


On 01/22/2011 09:42 AM, Peter Elke wrote:
> From: Peter Elke [mailto:pete.elke at esquared.com] 
> Sent: Saturday, January 22, 2011 3:26 AM
> To: Ken
> Subject: RE: [App_rpt-users] Location dependant squelch tail?
> 
>  
> 
> Hi Ken,
> 
>  
> 
> What I meant to get across was...  There is a squelch tail when the
> local mobile unkeys (before the hang time) but you only hear it if you
> are monitoring the local node's transmit frequency.  Remotely connected
> stations don't hear the tail, only a soft click or nothing from the same
> transmission. 
> 
>  
> 
> The local repeater transmitter dropping does not cause a tail if the
> mobile is in PL decode.
> 
>  
> 
> I thought this was just strange, so much so that I sound ignorant
> reporting it...
> 
>  
> 
> 73's Pete (WI6H)
> 
>  
> 
> 
> 
> 
> 
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Packet propagation across an the Internet and the use of jitter buffers in Asterisk causes this. On a network-based
connection, the unkey control message is reaching the far end before the audio packets containing the squelch tail
noise.  On a local connection, the audio packet delay is much less.

I suppose a delay could be added to the local audio packet stream, but this impairs full duplex operation even more
as the delay there is already annoying enough.

Steve.
WA6ZFT




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