[App_rpt-users] app_rpt and P25 (?)

David KE6UPI dshaw at ke6upi.com
Wed Feb 15 21:29:14 EST 2012


Jeremy, Does it said how wrote it???

David

On Wed, Feb 15, 2012 at 6:02 PM, "Jeremy R. Geeo [KDØEAV]" <kd0eav at gmail.com
> wrote:

> FYI - This link is working now...
>
> There does appear to be a channel driver that can be dropped into the
> Asterisk source tree called chan_usrp.
> Finally found it in their source tree: trunk/repeater/src/lib/
>
> This driver appears to be a bi-directional UDP interface between Asterisk
> and a USRP device (or discrimator tap type interface) using GNU Radio. It
> looks like it is capable of interfacing multiple SDR P25 and/or analog
> channels into Asterisk. That's a big statement. Assuming some higher
> horsepower hardware running all of this, it can simultaneously receive (if
> I'm reading this right, it can actually transceive) multiple P25
> (voice/data) streams and FM analog streams (each on a seperate app_rpt
> channel). The data stream can apparently be sent over to wireshark to be
> decoded (which also has to be patched).
>
> Haven't tried any of this yet. But with the right hardware, it appears
> that this would be fully function as a P25 interface (and more) into
> app_rpt.
>
>
> 73
>
> - Jeremy, KD0EAV
>
>
> On 01/16/12 21:24, Ramesh Dhami (VA3UV) wrote:
>
>> Hey All;
>>
>> Does anyone know anything about this project:
>>
>> http://www.sedition.org.au/**op25/wiki/RepeaterPage<http://www.sedition.org.au/op25/wiki/RepeaterPage>
>>
>>
>> This article seems to suggest some sort of 'channel driver' between
>> app_rpt and P25????
>>
>>
>> Unfortunately, the link in the article redirects to a University in
>> Australia, which prompts for a user name and passwd!
>>
>> Anyone have any scoop on this?
>>
>> Thx!
>>
>> Ramesh.
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>>
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