Hello All, Argue it as you may, the Internet is unreliable on many levels to due normal loading at those levels and vulnerable to targeted attacks, it is well documented, for the latest visit: http://www.cert.org/ It is targeted daily and will be the target in any major conflicts, its just a fact of the world in which we live.
The Amateur Radio Service (ARS) is about "RADIO", yes we can tie into the Internet, its been done in various for years in countries where it is legal to do so, however its only a bridge, its not the "RADIO to RADIO" communications system that the ARS requires regardless of what system one wants to make mention. Making use of the Internet for a delivery medium as part of the system is smart, for when its working it is fast, but we can not rely on it as the delivery system. The ARS requires its own "Radio to Radio HF e-mail system", wether it be based on STANAG 5066 or other, be it proven or new technology developed by the ARS for the ARS, it does not matter, what matter's is making it happen. Also, the Amateur Radio Service is a World Wide Service, where many languages are spoken, digital communications in many ways overcomes those language barriers, I do not subscribe to "SSB in English" and English is the only language that I speak fluently, if I in someone's opinion I am even fluent in English. Looking at STANAG 5066 as it does exist and provides all that the Internet provides if one wanted to implement and take advantage of all that, sophisticated high MIL-STD-188-110x modem core's now exist on the PC Sound Device Modem (PCSDM) a.k.a. Sound Card and are being used daily Commercially, by various Governments and some Militaries as well as by Amateur's (PC-ALE) in parts of the world were it is legal (not under present FCC Rules) and by the U.S. MARS program (MARS-ALE) as well. The first Commercial PCSDM based STANAG 5066 MIL-STD-188-110 offering to go public is from SkySweeper Technology, it will not be the last. The PCSDM has been in use for SIGINT tools for years now for decoding sophisticated digital waveforms, the CPU speed and OS reliable has arrived where the use of the PCSDM for two-way communications with this level of modem and sophisticated waveform has arrived. Here in the U.S. FCC Part 97 stands in the way of progress on these technical fronts at present as we need robust waveforms and speed, we need 3Khz channels (the big boys use 2ALE and 4ALE 3khz channels for their 19kb+ raw speed) to get somewhere in the range of 2400 to 9600bps raw data rate speed. I really do NOT believe that we need more than HF e-mail and file attachments, we do not need to be using HTML, which means if all we can achieve is 2400bps raw speed, that will be fine, its fast, I use it daily in MARS with FS-1052 DLP in both BRD, ARQ and FTP via MARS-ALE as the tool. The standard MIL-STD-188-110 serial tone modem calls for an 1800hz PSK carrier and 2400bps symbol rate which equates to 300-3300hz or 3Khz BW, as most MARS members do not have 3khz IF filtering, I added both optional PSK carrier selection and symbol rate selection, thus we can go from a 2khz BW to a full 3Khz BW, we made the selection of 1200hz PSK carrier and 1600bps symbol rate our MARS-to-MARS standard for that 2Khz BW, which is 200-2200hz, all radios filtering handles this, but the symbol rate still exceeds FCC Part 97 symbol rate by nearly 2:1 at present. The choices we have with all this at 2, 2.25, 2.5Khz BW and our raw data rate selections up to 2400bps ( our adaptive data rates are 75, 150, 300, 600, 1200 and 2400bps along with Short/Long Interleave selection ) places the use of FS-1052 DLP using the ARQ protocol in the same basic raw speed as PACTOR III and via the PCSDM, just compare it to 5 speeds of PACTOR III. If the FCC would bump the symbol rate to double, then the 1600bps symbol rate would then be legal. In comparing MT-63 to FS-1052 DLP BRD on the MIL-STD-188-110 modem vs the MT-63 FSK modem, the symbol rate is lower, the BW is kept at 2Khz max, the data rate is kept at 200 baud or 600bps, the FEC used is very similar to that or BRD, MT-63 could be beefed up with an Adaptive ARQ protocol and transport layer along with adaptive data rates and become the ARQ protocol for the ARS service, as a matter of fact we are looking at doing just this with MARS-ALE. Sincerely, /s/ Steve, N2CKH/ARR2EY Need a Digital mode QSO? Connect to Telnet://cluster.dynalias.org Other areas of interest: The MixW Reflector : http://groups.yahoo.com/group/themixwgroup/ DigiPol: http://groups.yahoo.com/group/Digipol (band plan policy discussion) Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/digitalradio/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
