Like IP over raw fiber. Our friendly WDM vendors would love to get rid
of SONET. SS7? What's that?
Sorry, gotta weigh in here...
As great as POS is, and as exciting as running IP on optical OC-48 onto WDM
gear sounds (no piece of cake, believe me...), there is STILL room for
ATM. More than just the much-touted network traffic engineering value, too.
Simply put, because of the B-ISDN heritage of ATM, I can actually run
synchronous circuits over it (using circuit emulation) and have it work right.
Can't get there from here with any IP-over-glass solutions, alas.
And as much as an "IP over everything" bigot as I've been for the last
17 years or so, I still run into situations where what I *HAVE* to
have is some kind of synchronous circuit. Wish it weren't so, but I can't
just tell people "oh, you can't do that"...