Furthermore AT&T has some of the oldest fiber in service. From what I have read some of their fiber might not even be in good enough condition to even run at OC-192 speeds. Therefore solutions running at OC-48 would be the only effective solution. I don't know how much of the installed fiber is not suitable to run at OC-192 but I would bet it's enough to make a difference.
Craig,
Thanks for pointing this out. When I read about the aging of fiber, and how some simply is not suitable for OC-192, I was wondering how long fiber lasts and/or if newer fiber manufacturing processes are better.
Edited: In reading Tim Bagwell's post, it seems that the aging of fiber may not be the issue. Rather, the issue may be the quality of the original manufacturing process (in terms of dispersability).
I think another issue is how fast you want to speed up the train. That is, LU's solution (when it exists) might works for some, but not all, portions of the railroad. That is, it may best work where the need to let off data passengers is diminished. (As I understand things, the faster you run the train, the less granularized are the data packets that you offload).
Gary Korn |
