To: George T. Santamaria who wrote (41261 ) 3/27/1998 8:14:00 AM From: David Lawrence Respond to of 61433
It was Boardwatch Magazine, with the article written by Jack Rickard -- both highly respected. Here's a link to the article - it's a long piece and takes a minute to load (½ a minute if you're running x2), but it is definitely worth reading, so allow yourself 10-15 minutes.boardwatch.com (there is a follow up link a little further down in this post) The only fallacy with their real-world test is that all of their testing was done from the same set of POTS lines, but even so it leaves one to wonder why x2 modems handled them so well and K56Flex didn't. Excerpts:Both Hayes and Rockwell assured us we were doing something wrong and that they had tons of data proving that their modems were great. They threatened to fly people out. They warned us repeatedly that we needed to be accurate. But we received no useful suggestions, data, or otherwise useful information. We were told point blank that US Robotics was lying. We had to go over it about three times before they finally understood that WE were doing the testing, we weren't lying, and US Robotics was as much a potential victim of our evil plots as they were. ... Rockwell sent a senior engineer to our site for two days. He noted that he could find nothing wrong with our methodology per se, or modem firmware versions. He did indicate that the modems were able to negotiate a K56flex session on paths with 0 or 1 rob bit, but never on paths with 2 or 3 rob bits, falling back to a V.34 connection in that event. He did note that this was not per design and did not yet have an explanation for it. And, here's a news.com article about the Boardwatch article:news.com Rickard predicted the performance disparity will carry over to the new v.90 standard because of the way the standard is written. "This is going to persist in the v.90," he said. "V.90 is the standard for how the modems talk to each other. But how the actual process is implemented is up to the actual modem developers." Understandably delighted by the report, John Powell, x2 field trial manager for 3Com, agreed with Rickard's assessment that the disparity would continue. "Everybody's client implementation is going to be different," he said. "It gives you a highway, but you choose the car." Rockwell disputed the findings of the study, saying that because all of the calls in the study were made from the same location, the results cannot be extrapolated to indicate worldwide performancec rates. "We told them what was wrong with their methodology and they published a flawed report," said Dean Grumlose, product line manager of central site modems for Rockwell. "It flies in the face of common sense that if we had the kind of performance problems indicated in this study, that we would have had the kind of success that we have had," he said. Grumlose also said that some ISPs had found the lines used in the Boardwatch study to be "atypical."3Com's Powell said that he examined the lines used in the study and found them to be "extremely average." [My gut still hurts from laughing at that one!] Without commenting directly on the report, International Data Corporation modem analyst Abner Germanow gave Boardwatch a vote of confidence. "The analysis and the coverage that I've seen Boardwatch write is typically very well done," he said. "I've never had any reason to doubt them."