[TrunkCom] Open Sky and Florida's pro-voice system and update form University of Michigan

Thu, 10 Apr 2003 01:33:49 -0400

Yes the DATA protocol is based on CDPD, however the Airlink (Air interface) for
Voice networks is based on  4-slot Time Division Multiple Access (TDMA).

Since most of the systems sold are both Voice and Data the network would have
two distinct sounds.

Gary Hahn wrote:

> Marcel:  According to MA/COM, the OpenSky protocol is based on the CDPD
> protocol.  http://www.opensky.com/about.asp  2 people have confirmed this
> sound for me in areas where they have implemented this.
>
> Scott B.:  If it "doesn't sound right at all", perhaps you'd like to explain
> your position.  Why bother commenting on something if you don't want to
> spend the time to back it up.
>
> I admittedly used the same sample for my CDPD and OpenSky listings, because
> to the ear, I could not detect a difference with the samples I was sent.
> It's quite possible that a busy channel may sound different from an idle
> channel, etc.  I'm always open for more samples....  Anything under 10MB.
>
> Gary
>
> > -----Original Message-----
> > From: Marcel [mailto:[email protected]]
> > Sent: Wednesday, April 09, 2003 11:30 PM
> > To: Gary Hahn
> > Cc: Trunkcom List (Trunkcom List)
> > Subject: Re: [TrunkCom] Open Sky and Florida's pro-voice
> > system and update form University of Michigan
> >
> >
> > It sounds like CDPD?????
> >
> > Gary Hahn wrote:
> >
> > > OpenSky sounds like this... http://www.kb9ukd.com/digital/cdpd.wav
> > >
> > > > -----Original Message-----
> > > > From: [email protected]
> > > > [mailto:[email protected]] On Behalf Of Jeff Kenyon
> > > > Sent: Wednesday, April 09, 2003 6:52 PM
> > > > To: [email protected]
> > > > Subject: [TrunkCom] Open Sky and Florida's pro-voice system and
> > > > update form University of Michigan
> > > >
> > > >
> > > > Hi everyone.  I am wondering if anyone has any more
> > information on
> > > > the new Open Sky systems that are going on line in
> > Pennsylvania, and
> > > > Oakland County, Michigan?  I have been hearing a strange sounding
> > > > control channel that doesn't sound like Moto or EDACS so I am
> > > > assuming that part of Open Sky for Oakland County is
> > turned on now,
> > > > but I am thinking just for testing. According to
> > trunkedradio.net,
> > > > Open Sky doesn't use a control channel though.  Also, I
> > am wondering
> > > > if any other agency is encrypting their control channel like
> > > > Florida's Pro-voice system?
> > > >     Lastly I have an update from University of Michigan from
> > > > trunkedradio.net.  As of yesterday their long time type IIi
> > > > hybrid system is now fully type II.  Other then that nothing
> > > > else is new, and I am still looking for work in the trunked
> > > > radio field preferrably on the technical support side.  Any
> > > > information and/or help would be appreciated, and thanks
> > in advance.
> > > >
> > >
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