DTMF can be done on NXDN, at least on the Icom handhelds many railroads are buying.
Not in NXDN, TT pad is for analog. At least for Icoms
Quite true. With Marine band now narrowbanding internationally, and NXDN being the standard they are looking at... Expect to start seeing Marine NXDN capable radios soon. Also with railroads using NXDN is digital encryption, which is being used on some Police chans, and administrative chans. It will never be used on yard, MOW, or mainline ops, but the days of always being able to hear the rail road cops are coming to an end.When DTMF is sent over NXDN digital, the actual tones are not being sent, rather a digital algorithm is regenerating the tones on the remote end; your ears hear what sounds like DTMF tones, but it’s truly digital signaling. DTMF is also available in P25 as well using the same method. Also many railroads are using NXDN throughout all of North America, but for now, it’s mostly secondary channels such as MOW, Yard, and Law Enforcement operations; common road channels will likely remain analog for several years to come. Also, watch in the coming years as NXDN is also coming to the marine band as well...
Is this likely to be Very Narrow NXDN (6.25khz BW) or Narrow NXDN (12.5khz BW)?Quite true. With Marine band now narrowbanding internationally, and NXDN being the standard they are looking at...
When quoting someone it is wise to actually read entire statement before trying to use it against someone. You should have looked at the sentence just before the one you ran with. "Also with railroads using NXDN is digital encryption, which is being used on some Police chans, and administrative chans. "Quote"
It will never be used on yard, MOW, or mainline ops,
I wouldn't count on that, we got 18 pair of NXDN freqs from the AAR for just that. I don't see it on mainline or RTC operations anytime soon but for other uses it's already here.
Quite true. With Marine band now narrowbanding internationally, and NXDN being the standard they are looking at... Expect to start seeing Marine NXDN capable radios soon. Also with railroads using NXDN is digital encryption, which is being used on some Police chans, and administrative chans. It will never be used on yard, MOW, or mainline ops, but the days of always being able to hear the rail road cops are coming to an end.
Why do Railroad Police need Encryption. What do they need to hide. Hey John CSX502 just killed 2 bums at milepost marker 71.2.Maybe, I misunderstood the statement due to the break in sentence structure and I wasn't using it against anyone, but I was making a statement that still stands as it will be a long time coming before NXDN is used on mainline channels with "E" or not, and far as NXDN "E" on other channels we use it all the time for Fire Operations and Radio Repair, maybe in about 5 years on MOW and Track too. Still have about 4000 HT-1250's out they, and our PD is soon to be on 800/700 with AES.
Ok I can see from your aspect the need for Encryption.They do not want you to know they are busting you for stealing thousands of dollars in retail goods fr that boxcar. Or see you playing with air lines for the braking system which will cause a in yard derail. Or that your planning to actually cause a derail for terrorist reasons?
it was chosen to screw Mot for the abandonment of support for their RR radios AND when Icom and Kenwood came in a better Codec the Ambe II with an open format that uses less bandwidth, and any radio manufacturer could use they chose it. A no brainer .