P25 on a stick ?

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Mike Alpha
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Joined: Thu Aug 14, 2008 8:22 pm

P25 on a stick ?

Post by Mike Alpha » Mon Apr 16, 2012 12:24 am

Has anyone played with these? http://www.dvsinc.com/products/usb_3k.htm

The Digital Voice Systems, Inc. (DVSI) USB-3000™ is the perfect combination of DVSI's AMBE™ Vocoder Technology with a USB interface. Connect the USB-3000™ to a Windows based PC's USB port, and users can encode and decode files, or develop a customized system to process real time speech.

Mike

matthewn1983
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Joined: Sat Feb 06, 2010 9:41 am

Re: P25 on a stick ?

Post by matthewn1983 » Mon Apr 16, 2012 7:37 am

Nope, but check http://www.youtube.com/watch?v=wShOLgW2tmI out, you can do the same thing with a $20 usb tv tuner. Ill be trying it out next week when i have a few days up my sleeve.

citabria
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Re: P25 on a stick ?

Post by citabria » Mon Apr 16, 2012 12:22 pm

The big question is why bother? Theres at least 4 open source implementations of IMBE that I know of...

Why spend money on a dongle, which then you have to write code to send the data to and from the device, when all this has already been done with free software (OP25, DSD, etc)

citabria
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Re: P25 on a stick ?

Post by citabria » Mon Apr 16, 2012 12:26 pm

Having said that, the worst thing about DSVI is that they don't bother with customer service t all.

I have contacte them previously to purchase development boards and they just don't bother replying..

DVSI - "Voice CODECs with arrogance"

:D

Mike Alpha
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Re: P25 on a stick ?

Post by Mike Alpha » Tue Apr 17, 2012 10:35 am

Out of curiousity, what do you think this dongle is worth Matt?

Mike

citabria
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Re: P25 on a stick ?

Post by citabria » Tue Apr 17, 2012 11:01 am

DVSI quoted me $499US. Keeping in mind that you then need RF hardware and software to interface to it..

What do I personally think its worth? Maybe $10 tops. Motorola pay about $20 per radio in royalties to DVSI because they buy in bulk, and the scanner manufacturers get a similar price too. MBE based codecs are 30 years old now and DVSI have got the market cornered. Public safety vendors are literally over a barrel.

You can get an free open source library that does everything that dongle does:- https://github.com/szechyjs/mbelib or here https://op25.osmocom.org

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