On two meters and 440, we have programs in use called D-Chat and D-Rats that send data back and forth between users, either simplex or through a repeater connected to the gateway. There is no high speed data capability on two meters and 440 because high speed requires more bandwidth than we have available on those bands. D-Chat has been used in emergency tests and drills and can provide hard copy to back up voice communications.
The ID-1 (1200 mHz D-Star radio)) is capable of 128k as there is bandwidth available on 1.2 gHz for the speed. Increased bandwidth means less range and to this point switching times have prevented using the ID-1 with amplifiers in the DD (digital data) mode, so range may be limited. It would require about 200 watts on DD to equal a ten watt DV signal. The ID-1 is capable of connecting to the internet for email and web surfing, although that is limited by regulations and would not be what you might consider high speed in computer world terms. D-Star radios can all forward D-PRS data to the D-PRS server which is posted to the net on sites like www.findu.com . Some radios can be purchased with optional GPS, and all can be connected with outboard GPS. So if I understand your questions, yes D-Star can allow text messages between stations, exchange of short files, and GPS tracking of units in the field while still allowing for voice communications-- all using the slow speed data capability available on 2 meters and 440. Ernie W6KAP --- In dstar_digital@yahoogroups.com, "n0uyx" <n0...@...> wrote: > > Let me run this by you guys once more. From what I am told D-Star is > currently being used for Simulated Emergency Test and are sending > DATA about patients at Hospitals. I get this info from a Guy who went > to the Jacksonville, MS Hamfest and this info was put out at a D-Star > conferense. OK so we take a PC and hook it up to a D-Star radio and > can run HIGH Speed DATA with it right? OK so this being the case then > why cant we send a MSG from one D-Star radio or user to the other? I > was told here that can't be done. But if we can send HIGH speed data > then of course it can be done if it's not being done right now is > only maybe because somebody hasn't designed the software for it? Is > this right? > > So if we can send HIGH speed data which could include MSG and Station > Status or Beacon data and it makes it to the Internet then D-Star > could send email, TEXT MSG and so on. Also a Server could be designed > to handle D-Star/ APRS MSG so the two could send info or data from > one to the other at a very limited size because of APRS data limits. > > Did I not ask this same thing a few weeks ago? Why couldn't the above > be done? Lack of interest? D-Star Copyright Infringement? > > What am I missing here? > > DE WW5RM > Randall >
