While the thread has drifted from the original subject, this is the only thread I found (within the past year) that shows DNS as the subject.

Several people here have mentioned using DNS with good results. Massive advertising (in emails I receive and on my local TV) claim that the newest versions are "greatly improved." (?)

An apparent "spinoff" on the idea of voice recognition appears in an ad in the latest issue of Smithsonion Magazine, for a telephone featuring "amplified sound" and a "simultaneous" real-time display of the text spoken. (The magaxine is quite reputable, but not all the advertisements are as reliable as I like to be able to believe.)

The ad claims no requirement for the caller (unlike TTY, which has been around for years), with all text-conversion done by your own (receiving) phone. Identification of the producer/seller is a bit vague, with only a (US) 877- phone number given for "more information." The most positive point I noted is that they don't claim "Medicare will pay for it, if you're hearing impaired" as any competent scammer would probably do.

I'll omit further details (which were sparse in the ad) pending indications of interest, but will try to keep the ad where I can find it for a while in case someone wants more. The idea of a speech-recognizing 'phone is interesting enough that similar devices may appear soon, if these people show some success (?) although this is the first one I've seen. It's also possible that something similar is already known by those who've needed something of the kind(?).

John