Digital vs Analog cordless Phone? Health Radiation is the same?

Nope. Long wave or far IR is heat. Short wave or near IR is ummmm... near IR. Note that there are various division of IR:

Nope. I can prove it with a simple test. Heat up a frying pan and put it in front of IR receiver window in your TV, hi-fi, or whatever. That should belch many watts of heat in the IR region. Then try using the IR remote control. It will work because the 8000-15000 nanometer wavelength of the IR "heat" from the frying pan is quite different from the 850 nanometer wavelength of the IR emitter in your remote control.

Try that outdoors, in the bright sunlight where it isn't a narrow slice of IR.

Yep. An IR cordless phone probably won't work outdoors.

See my comments in this thread on the IR paging system I helped design. Solar and inside lighting interference were major problems. The solar spectra contains plenty of near IR radiation, that does a splendid job of trashing IR data. However, if the IR beam can be controlled to a small spot size with lenses and filters and sunlight excluded with baffles and shades, high speed IR data is possible. Due to fear of RF, the local hospital has a bunch of IR ethernet links on the rooftops. Those are great fun shooting over the freeway, where the rising hot air from the vehicles causes all kinds of strange propagation effects.

What do you await. A horn growing out of the head?

Long time meat consume dazzles the mind too, as per an U.K. survey. Makes more prepared to take risks, respectively, they can't estimate risks as good as they can while normal biological operation.

The poor fools never stop to think about the broadband radiation from our sun. I used to dread the 'Solar outages' on C-band when I worked in CATV & broadcast. No matter how much advance warning you gave, idiots would jam the phone lines, day after day as they lost their garbage TV for a minute or so. The sat's EIRP was over 100W at 4 GHz, and the sun swamped it easily.

It still happens today with Ka and Ku band solar outages, when the sun gets behind the satellite belt twice a year. I used to announce the solar outages on a local newsgroup for a different reason. I live in a forest, where locating suitable locations for a DBS dish is tricky. The easiest way is to wait for when the sun gets behind the desired satellite, and photograph the roof during the outage. That's where a dish will work. Here's some of my photos for DirecTV at 101w. Note the shadows from the tree branches on my dish indicating I have a blockage problem. I don't post the outage predictions any more because with the current HDTV satellite distribution, it takes 3-5 satellites for full coverage, which is impossible through all the trees.

I no longer work with any Sat, so I'm not the one that catches hell for it when 10,000 people lose HBO on a cable system. At least with KU band you need a smaller break in the trees than you needed with a five meter fiberglass dish with multiple feedhorns for a CATV headend. That was back when a 100°K LNA & 3" Heliax was common. :)

The trees here used to be thicker than that, till two years of high hurricane activity a few years back. Now about 90% of the bigh trees are gone, leaving the shorter & stronger trees behind.