John Higdon <john@zygot.ati.com> (08/07/90)
This morning at 8:45 (a golden hour of sleep), a gentleman from Sprint
called to discuss my problem with data communications. He told me that
he had called the numbers at each end and discovered Telebit modems.
Quite right.
He then proceded to explain, in great detail, the problem with CCITT-
compliant echo suppression and the Telebit's inability to reliably
disable them. He talked frequencies, timings, and asked further
questions about the difficulty. We talked for about ten minutes, and
after our conversation I was convinced that the problem lies within
the firmware in my modems.
Of course, the immediate fix is to use another carrier (such as AT&T)
where this problem doesn't occur. The long range fix is for Telebit to
modify firmware so that their modems can successfully disable echo
cancellation on CCITT-compliant systems. Since Telebit is in the local
area, I will now direct my complaints in their direction.
Sprint has finally done what I would minimally expect from a company
that has aspirations to greatness: looked at a problem and discussed
its solution with a customer. I am satisfied that although I may not
be able, for the present, to utilize Sprint's services, the company is
providing product in good faith. My only beef with Sprint at this
point is that it took them a week to come through with an explanation.
Maybe that will improve with time.
John Higdon | P. O. Box 7648 | +1 408 723 1395
john@zygot.ati.com | San Jose, CA 95150 | M o o !peter@ficc.ferranti.com (peter da silva) (08/08/90)
UUNET 800 service is provided by SPRINT. UUNET uses Telebits. For quite a while UUNET was having problems with SPRINT's echo cancellation. These problems seem to have stopped. I don't know know if it was UUNET's or SPRINT's action that fixed it, but we made no change to *our* Telebit. I would suggest mail to postmaster@uunet.uu.net. Peter da Silva. `-_-' +1 713 274 5180. 'U` <peter@ficc.ferranti.com>