[op25-dev] Why can't I hear fire tones?

Chuck Kelsey wb2edv@roadrunner.com [op25-dev] op25-dev at yahoogroups.com
Sun May 20 18:42:49 UTC 2018

My take is that any paging tones that one happens to hear over P25 
systems is because the system is simulcasting an analog channel that 
carries them. That's what is happening in my county. As soon as the P25 
is 100% switched over, the fire paging will only go out over an analog 
channel. Tones sent over a digital system (P25 or other) do not decode 
reliably - the codec doesn't handle a tone well and the frequency ends 
up getting shifted.


On 5/20/2018 2:15 PM, zlatiolais at yahoo.com [op25-dev] wrote:
> Same here. I can hear our tones on the high band. I think it depends 
> on how the core is sending them.
> *From:* op25-dev at yahoogroups.com <op25-dev at yahoogroups.com>
> *Sent:* Sunday, May 20, 2018 10:36 AM
> *To:* op25-dev at yahoogroups.com
> *Subject:* [op25-dev] Re: Why can't I hear fire tones?
> Do the tones not go like voice over radio. Is it like a code that the 
> scanner then changes into a beep?

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