Not really. They are all using the max anyway as you are dealing with about 9600 kbs. The AMBE2+ vocoder is decent but at 6.25 to 12.5 KHz there isn't a hell of a lot of room to play with.
On Thu, Nov 5, 2015 at 9:26 AM Chuck McCown <[email protected]> wrote: > I would think they could select the compression/voice quality. > > *From:* George Skorup <[email protected]> > *Sent:* Wednesday, November 04, 2015 8:49 PM > *To:* [email protected] > *Subject:* Re: [AFMUG] OT 2-way radio systems > It's a vocoder so it's gonna sound mr roboto. > > On 11/4/2015 8:27 PM, Jaime Solorza wrote: > > For my tower work I am happy with Cheap radios... Public safety is another > world...but the point I so poorly tried to make Is that I like the sound of > my Icoms over the Motorola ones used around my area...but again I didnt > like the Harris digital voice either. Its me.. Okay...stop making sense > ...my head will blow up > > Jaime Solorza > On Nov 4, 2015 6:56 PM, "Lewis Bergman" <[email protected]> wrote: > >> Firstnet is still an 8 billion dollar pipe dream. VoLTE is still >> vaporware. P25, like it or not, is really the only viable option right now. >> Sure, twenty years from now P25 might not be the right option. But right >> now, show me another? >> >> Tetra isn't an option because there aren't enough 25KHz channels to make >> a large system work in most cases. And if you want to see expensive try out >> a tetra terminal. They make P25 look reasonable. By the way, Motorola >> invented Tetra too. >> >> Blaming Motorola for inventing something, and then not wanting to give it >> away is simply rediculous. Would you do that? >> >> Lastly, you are not seriously comparing a $100 Chinese piece of crap to a >> piece of gear you would bet your life on are you? Really? About the >> cheapest P25 portable you can get is $1250 while the same model without P25 >> is about $855. So the license to do P25 is about $400. Pretty pricey no >> doubt. Maybe to much, but also reliable. >> >> But, not everyone wants the reliability, interoperability, or the price >> tag that goes with it. >> >> I honestly think DMR TIER 3 has some compelling arguements at a better >> price point. But like most other protocols it is late to the party. >> >> >> On Wed, Nov 4, 2015, 6:21 PM Chuck McCown <[email protected]> wrote: >> > Thanks Brian. No, Utah is asking the taxpayer for $236 million... >> >> Lots of people arguing against it. >> >> >> >> *From:* Brian Webster <[email protected]> >> >> *Sent:* Wednesday, November 04, 2015 4:57 PM >> >> *To:* [email protected] >> >> *Subject:* Re: [AFMUG] OT 2-way radio systems >> >> P25 or Project 25 was a Motorola proprietary technology that was >> developed in the 80’s. They championed it to APCO to become the digital >> standard for public safety radio systems. APCO would not adopt it until >> Motorola agree to license it to other manufacturers. That delayed the >> process a very long time and Motorola went kicking and screaming in to the >> agreements at first. It was not cheap for a manufacturer to go that way but >> APCO did not want a single vendor solution. In the rest of the world the >> Tetra standard was adopted but again this are older technologies. Now the >> push is for LTE and Voice over LTE. When the FCC mandated narrowbanding for >> analog VHF and UHF radio systems they gave a 15 year window to migrate. >> Even with that much lead time big cities like NYC, Boston, DC and others >> did not make the deadline because it was typically a complete system >> replacement. These big cities got waivers with a plan to migrate, those >> plans were special licenses for the Firstnet spectrum and the plan to >> develop a public safety grade/reliable voice over IP type network to become >> their primary dispatch radio system in conjunction with their data >> deployments. That VoLTE development is ongoing. They need a lot more >> reliability than what Nextel and CDMA push to talk cellular solutions >> currently deliver. >> >> >> >> Given that VoLTE development and the push for FirstNet systems, many >> folks argue that it’s a waste of money to go P25 at this point. There are >> even some Tetra deployments now in the US. Seems to me a standard that >> follows LTE and will also work in the narrowband spectrum of public safety >> radio systems is more productive. I started my wireless career in public >> safety radio designing and selling Motorola systems. I think they build a >> great product but P25 radios are way too expensive for smaller agencies to >> afford them. With the proliferation of sub $100 FCC approved Chinese radios >> out there, it’s real hard to justify these digital systems when one is on a >> budget. P25 radios are in the $1500 per radio price range. Small fire, EMS >> and law enforcement agencies have a hard time paying those prices. There >> are benefits to digital systems but in all honesty many users don’t take >> advantage of them. The cost of the central site controllers for the system >> really pushes the price tag up. To add insult to injury almost all federal >> grant programs now state that if there are radios involved, they HAVE to be >> P25 compliant. The DOD has mandated all radios be P25 compliant. If Utah is >> getting grant money that is probably why they are going P25. >> >> >> >> Thank You, >> >> Brian Webster >> >> www.wirelessmapping.com >> >> www.Broadband-Mapping.com >> >> >> >> *From:* Af [mailto:[email protected]] *On Behalf Of *chuck@ >> <[email protected]>wbmfg.com <[email protected]> >> *Sent:* Wednesday, November 04, 2015 4:56 PM >> *To:* [email protected] >> *Subject:* Re: [AFMUG] OT 2-way radio systems >> >> >> >> Thanks, that is helpful. >> >> >> >> *From:* George <[email protected]>Skorup <[email protected]> >> >> *Sent:* Wednesday, November 4, 2015 2:50 PM >> >> *To:* [email protected] >> >> *Subject:* Re: [AFMUG] OT 2-way radio systems >> >> >> >> Illinois has state-wide P25 (owned and operated by Motorola Solutions). >> Interoperability between agencies and all of the other P25 stuff is nice, >> but every little town can't afford it and that's why we still have little >> dispatch centers that represent small communities and make use of regular >> old analog VHF. Plus, a lot of users on the state system say the coverage >> sucks, and that would be Motorola not building enough sites. >> >> On 11/4/2015 1:16 PM, [email protected] wrote: >> >> In Utah, there is a very very large proposal to change all the 2-way >> radios for public safety out to a P25 system.� Some of the opponents say >> this is an outdated system.� I had not heard that before.� Looking for >> opinions.� >> >> >> >> >> >> >
