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To: Kachina who wrote (482)	8/17/1999 6:29:00 PM
From: Srexley	Read Replies (1) \| Respond to of 626

Does anyone know the true transfer rate of a T1 line? I would like to verify the accuracy of the nearly one hour file transfer time that SR states also. I talked with a relative of mine and he said he sends a 700mb file via T1 every night and it takes 7 hours. That sounds way too slow to me. On the other hand, your 40 second time seems too fast. Please try to verify the size of the file and method by which it was sent. Your message indicating a non compressed 238mb file from CA to TX in less than a minute seems too fast (5.95mb per second). If it is accurate it is still relatively slow compared to the 50mb per second (approx) that SR claims. Also, your statement is presented in a way that indicates that you feel SR is trying to pull the wool over our (and SDSU's, the Telcom industry's, etc) eyes. You theorise that they may be using file compression (but have nothing to back it up) and you don't even know for sure how you sent the 238mb file (probable T1). I don't mind the skeptical views that you have regarding SR and their technology, but when you offer your views based on your suspicions (and not facts) then all you are sharing with the thread is your skeptical view. I would think with all the technical people on this thread that someone would have an idea as to whether a 411mb file would take almost an hour on T1 or ADSL. There is a big difference between almost an hour and the 69 seconds that your "probable" T1 can achieve.

To: Kachina who wrote (482)	8/17/1999 6:49:00 PM
From: Matt Kroll	Respond to of 626

If you transferred a 238 Mbyte file in 40 seconds, you certainly have a better connection than a T-1. In fact, that's better than you could do with a T-3 (wish I had a connection like that)! I believe the press release to be correct. They mention T-1. With a T-1, transfer time would be ~45 minutes for a 411 Mbyte file, which could certainly be 56 minutes with network overhead thrown in. No compression was used.

To: Kachina who wrote (482)	8/18/1999 1:50:00 AM
From: Scott C. Lemon	Read Replies (2) \| Respond to of 626

Hello Kachina, > I just transferred a 238 Mbyte file in roughly 40 between > California and Texas - probably T-1 or better. This is a pretty amazing feat ... First, on average I have found bulk data to be about 2:1 compressable ... not 4:1. And at 2:1 it takes some pretty intensive CPU to do this to streaming tape media. If you are seeing 4:1, at full bus speeds, then I'm curious what type of hardware you are running on? And what type of file? Is it all ASCII text? As for the numbers that you provide, I wanted to do some basic math to evaluate your link speeds ... 238MB in ~40 seconds = 5.95MB/sec If there are ~10 bits per byte with overhead ... 5.95MB/sec = 59.5Mb/sec (megabits per second) A full T3 is only about 45Mb (megabits per second) So you were more than saturating a T3+ ... Is this an internal leased connection? What is your connection to the Internet? Scott C. Lemon