You do know that all dial up cards that the phone service uses are set at 26 K but they can sometimes be forced to run at close to 56 by putting three commas after the number that you dial to access the ISP,Try it and let me know.I can't do it where I am right now but I have done it in many other remote places before.
They are actually 56K cards that are tuned down to cut heat generation,By law they cannot do anything about it if you force the card to run at 56K
If I disappear from a discussion please forgive me. My 24-7 business requires me to split mid-sentence to serve them. I am not ducking out, I will be back later to catch up.