Batboard

Is there any software to decode unencrypted P25 audio from the V.24 port of a Quantar radio (audio encoding is not needed)?
Thanks.

Not that I've ever seen or heard of. Been doin this a while now. Maybe someone else can chime in?

Yep! DIU3000 firmware

(sorry, couldn't resist)

If you were really really keen then it might be possible to use the IMBE routines in the DSD package [ see: http://wiki.radioreference.com/index.ph ... e_package) ] and an open source HDLC stack [ http://www.ohloh.net/p/opensourcehdlc ] or mess with the built-in support in Linux.

Also the DSD software can only be used in your own private ‘lab’ as any commercial use would seriously breach the intellectual property rights of others, mainly Digital Voice Systems, Inc (DVSI).

The next problem is that there is not much hardware available to support the serial sync interface needed from the Quantar to the PC so another option is to use an HDLC to IP adapter (Cisco or IPtube). I’d also be looking for an old HP HDLC protocol analyzer or maybe use Wireshark to help debug the Motorola quirks in the Quantar – DIU protocol. Oh, and you’d need borrow a DIU to capture protocol details as they’re not in any Moto documentation I’ve ever seen.

I have no doubt it can be done but unless you're handy with programming then it would be easier to get a DIU. See als this thread: http://batboard.batlabs.com/viewtopic.php?f=10&t=102796

Thanks. This is a good start.