[FedCom] Re: Unknown Frequencies (J Doe) - Is that your real name?

[Ken]

Hmm that's interesting.  Isn't there something in digital called the 
"Network Access Code" NAC that is basically the same as ctcss/dcs?   I 
understand that there's thousands of NAC combinations.  Surely repeaters 
would want to be protected from unauthorized access.  HOWEVER, you are 
correct in that some FBI geographic areas (even in analog), more than 1 
repeater will repeat the same traffic.

Ken
Springfield MA Monitoring Area

----- Original Message ----- 
From: "Michael W. Scheel" <mws72 at qconline.com>
To: "Discussion of Federal Government Communications" 
<fedcom at mailman.qth.net>
Sent: Saturday, October 07, 2006 4:20 AM
Subject: Re: [FedCom] Re: Unknown Frequencies (J Doe) - Is that your real 
name?


> Several years ago I was told a reason for the switch. With digital 
> encrytion they could not select a site like with analog voice with CTCSS. 
> So you would have different outputs with the same input so now when they 
> select a site it is the output channel they are selecting. I do consider 
> the person who told me that to be an expert in Federal Monitoring.