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in this Thread  ATM is used from the modem to the DSLAM, but the
authentication and control, which is PPPoE, is encapsulated
within the ATM cells.  C. O. based DSLAM's are DS3 sized pipes
that traverse across the ATM cloud, and eventually will
aggregate with other DS3 connections to an OC3 port that feeds a
particular RedBack at ASI.  The Remote Terminal, being field
based, are Telco owned and operated. The circuits will
eventually terminate on an ASI RedBack, but must first traverse
the Telco network. This includes circuits originally terminating
on an OCD device, which concentrates the circuits of several
individual Remote Terminals , then terminates them as 1 logical
pipe to the OC3 port of the ASI RedBack.  If the ASI RedBack has
say 10 PVC's terminating on it's OC3 ingress port, 7 may be
individual DSLAM PVC's, and the 3 remaining may be Telco Remote
Terminal PVC's, which in turn