MCI [ATM overhead]

I.e. a dual clearline DS-3 actually carries as much user data as OC-3c ATM.
Which, incidentally, was why SprintLink backbone design is easily expandable
to dual links (that includes carefully considering implications for routing).
Sean presented that design on NANOG a year ago, BTW. Funny thing, the design
is expandable beyond that, too, so OC-3 ATM is already obsolete.


If OC-3 is obsolete, what does that make DS-1s and DS-3s?