Zerify Inc (ZRFY)

[Gold49er]

Guidance is not a Standard.

I asked for something that showed MFA was a Standard. Not a Guidance. !

Guidance is like the example: "You should wear your Seatbelt", not until more than a decade later did seat belts become mandatory for the user.

Or the Line Code Algorithm for ADSL (DSL), there were Two Forms,AT&T CAP & Amati G DMT. Both were being used prior to 2000.

Then Amati (Texas Instruments) who bought out Amati, and Amaiti finally won the IEEE T1.413 G992.1 International Standard for ADSL.

DMT ADSL Reference

I invested in Amati's DMT in 1996, as I understood the Vast Benifits of DMT over AT&T's CAP within a month of doing DD.


Of course back in 1996, if you did a search on ADSL, you got only 6 hits. Hard to do DD that way.

Today you get over 14 Million search hits.

I could see the Overwelming Evidence and Benifitof his DMT, once you knew how inferior AT&T's CAP Line Code (Algorithms) were......
http://www.bing.com/search?q=ADSL

I know and can easily understand Technology and what is the better Tech. After all I bought the 1st Laptop on the Market, in 1983,
https://en.m.wikipedia.org/wiki/TRS-80_Model_100" rel="nofollow" target="_blank" >https://en.m.wikipedia.org/wiki/TRS-80_Model_100[tag]
Model 100 LapTop.[/tag]

I was able to buy a Demo Model, before it was being sold, I remember while on a Business trip in 1983. I still remember the Stewardess on the plane ask me "What's That ? " as I was typing my Trobleshooting and Fixes on an F-4 Simulator on my way home. I was the East-Coast Tech-Rep on F-4 Flight Simulators at the time.

Back in the late 97's I wrote WHY DMT for ADSL, I don't have access to that at the moment.

So here is WHY DMT For VDSL I wrote in 1997 (Which is what AT&T is still Using Amati Communications Corp's DMT Line Code for AT&T's U-Verse TV and Internet today, Ten Years later, yes even in the World of AT&Ts U-verse Fiber Optics Transmission Subscriptions today ! Amati / TXN gets Lots of Licencing Revenues.

Not just getting Licencing and Royalties, but since SFOR's IP covers Credit Card Processing there is a possibility of SFOR getting a Very small percentage off each transaction.

Who knows, but that a distinct possibility.

I just know that SFOR'S Patents and the Major Players SFOR and it's
Channel Partners are working with are Investable for me. Especially being a Penny ! That's an Easy Risk to Reward Investment which is why I own Millions of Shares. It's just hurry up and wait, and I delete with that working on a DOD Contracts since I was 20 years old.

ALL Amati's Patents are still gaining Royalties World Wide on
Dr. John Cioffi's Professor Stanford University Patents, who Like Ram, Coiffi, they both worked "INSIDE" BELL LABS. In Dr. Cioffi's Case he was in Bell Labs when they Developed The "Inferior" CAP Line Code.

So years later Professor Cioffi and a Special Class of his, wrote the Algorithms for DMT Line Code.

And not unlike Ram Pemmaraju's & StrikeForce's IP,
Dr. Cioffi's IP lead him to form Amati Communications CORP.

A little unknown company that no one knew the name of, and became the International Standard for ADSL, used by every person that has an ADSL (DSL) Modem on their PhoneLines World Wide.

Sorry guy, I will trust my Background Judgment in knowing a World Standard before your opinion.


______________________________________________________ A Post of Mine from 1997 WHY DMT For VDSL
______________________________________________

With that said -- Robert let me try to help you and others understand why CAP cannot compete with DMT in the VDSL arena.

In order for CAP to achieve the same optimization as DMT, CAP/QAM must rely on transmit filters and receivers to remove energy in the bands.

Determining how well the energy is removed is directly proportional to
the number of taps used in the filters, this is limited by the complexity (which equals cost) of the system. Generally speaking, hundreds of taps are required to sufficiently remove energy beyond the
useful band.

Over and over again we have heard how much more complex DMT is in
comparison to CAP. ** Well pay close attention Amatians, do to the
complexity/cost constraints only a fraction of the required number of
taps are used in CAP. For this reason CAP modems may operate on short
distances across copper with few problems, the number of taps are
adequate. But on longer distances CAP modems fail catastrophically. On longer lines CAP/QAM confine the transmitted signal to the useful
frequency band, this allows the reliable signal in the correct part of
the band, to be corrupted by the bad signal in the wrong part of the
band.

Loop lengths are shorter for VDSL, and after the above description, it
might seem logical for one to assume this would be an advantage for
CAP. Sorry to disappoint some of you.

Though the loop lengths are shorter, the frequencies used are much
higher in VDSL. VDSL using the 11 Mhz and above, where ADSL uses 1.1
Mhz. Now what problems may CAP in counter one might ask? The higher in frequency the more the signal is effected by noise!

The copper infrastructure in place is not shielded, (of course I mean
the twisted-pair telephone lines and not shielded coaxial cable) and
leakage occurs "into" unshielded copper, this commonly known as "ingress" and leakage "out of" copper, is known as egress. Let's start with ingress. VDSL modems must be able to operate in with the presence of over-the-air radio frequency interference (RFI) entering the copper bundles and smaller lines running into homes and offices. I'm sure many are familiar with a Die-Pole antenna (looks like a T) that most have connected to their stereo FM Receivers.

Sure increases your signal strength right. Those radio signals are
picked up just fine on that short 6ft little piece of copper. Now try
to imagine what a huge antenna that line running from the pole to your
house makes, or the lines running along miles of telephone poles to your neighborhood. So VDSL must be tolerant of in-the air transmissions (RFI) - see Ref. in Why DMT).

In AM/FM radio the noise is at a fairly constant rate. In the case of
Ham Radio, the signal is not always there, only when the operator keys
the mike. Before moving on to egress, lets talk about another form of
ingress noise that effects VDSL. Anyone have an Air Conditioner,
Refrigerator, Dishwasher, washer/dryer, or a hair-dryer in the house.
Each time one of these devices cycles on or off it causes noise spikes that can easily effect the signal of VDSL modem. Even a simple light switch can have an effect. This is known as Impulse Noise.

DMT being a multiple carrier having 256 channels, the effect of impulse noise is dispersed across the entire 256 channels, the effect is so minor on each channel it does not cause any interference to the signal. (this is the most simplest way I can explain how it works)
There is no added complexity with the DMT method of handling the above described impulse noise.

CAP/QAM is a "single carrier" signal which cannot handle impulse noise as simply, it must use old Error correction coding, and interleaving of the transmitted signals. Once again this is the simplest way to explain the way it works not necessarily the best, I am writing to the audience, not T1E1.4, nor would I attempt to.

CAP handles RFI by using transmit filters, and receiver equalizer
filters, and must create notches in the bands to be avoided. Again the
complexity of incorporating enough of these filters to remove the noise would be cost prohibitive, when we take into account that many amateur radio bands overlap the VDSL spectrum, is it any wonder that the CAP proponents avoid discussing, this issue, in fact they are promoting the fact that Amateur bands are not of concern. Well I'm here to tell you they are, and even more so in Europe where amateur radio dwarfs the U.S. numbers.

Egress

For CAP's problem with Egress or leaking from copper lines, see the
above paragraph about British Telecom's test. It does not make for
happy campers in Europe, nor in the U.S.


How does DMT cope with Egress, short and sweet, they turn off the
channels that have an affect the Amateur Radio and Short-wave bands. See References above for a more in-depth description.


Maybe they thought DMT VDSL was not feasible, but Amati has now
solved these problems by going half-duplex (ping-ponging)? I have no idea. I was hoping that someone with more knowledge might comment.

Robert, I will continue hopefully answering your question.

As I mentioned in my previous post ping-pong DMT for VDSL is known as
SDMT. The "S" meaning synchronized. SDMT is Low Complexity
Here, there is only one Fast Fourier transform (FFT) per modem. ( FFT - see Ref. in Why DMT).

This one FFT is shared by the transmitter and the receiver of the modem, as only one of the two are on at a time. This is less complex than a modem, which has a separate hardware for both the transmit and receive functions, as is the case with CAP/QAM. It should also be noted that since SDMT has only one transmit and receive band, it only needs one analog filter. SDMT's power consumption is "very" low. ( I do not know exactly, at this time)

Another excellent feature of SDMT is that the same VDSL modem is able to be configured for either Asymmetric or Symmetric transmission.

Once again the CAP modem is at a disadvantage, it must change the
bandwidths, of the downstream and upstream bands in order to change
symmetries.

I must say to those who say that CAP is the better choice for VDSL, they have little imagination, and even less patience to use their engineering background to it's fullest potential, when trying to arrive at the solution for the RFI and other interference's on VDSL transmissions.

I thought about providing a summary, but then thought if any one needs one, it would be easy to create one as the key points stand out on their own.

Perhaps someone may provide one.

Amati's Engineers are undoubtedly some of the best in the world, though in DSL, there is no question in my mind, they are the best. It would appear that some of the largest DSP manufactures in the world share my convictions. In time I feel confident that we will see that praise, stated in much more flattering verse, in a forum far superior to this one. Editors note: This statement was written last week before TI spoke at the Montgomery Conference. Thanks Peter Piper. I'm sure more will follow.

In closing I would like to attempt to bring home the points covered
above, in a much simpler terms, this is for those who find the above confusing.

Since many of you may be audiophiles, or at least enjoy the sound of a
decent stereo system.

Pull out an old 45rpm record or an old Album. Turn the volume way up, and play it. Now don't those Clicks and Pops make you cringe, it's almost sounds as if they could be damaging to your speakers.

This is your DATA on CAP, any questions?

Now put on a CD, I suggest Life in The Fast Lane, by DMT.