Jared,
I keep hear of Frame-Relay and ATM signaling that is going to happen in large providers MPLS cores. That's right, your "safe" TDM based services, will be transported over someones IP backbone first. This means if they don't protect their IP network, the TDM services could fail. These types of CES services are not just limited to Frame and ATM. (Did anyone with frame/atm/vpn services from Level3 experience the same outage?)
Is your concern that carrying FR/ATM/TDM over a packet core (IP or MPLS or ..) will, via some mechanism, reduce the resilience of the those services, of the packet core, of both, or something else?
We're at (or already past) the dangerous point of network convergence. While I suspect that nobody directly died as a result of the recent outage, the trend to link together hospitals, doctors and other agencies via the Internet and a series of VPN clients continues to grow. (I say this knowing how important the internet is to the medical community, reading x-rays and other data scans at home for the oncall is quite common).
Again, I'm unclear as to what constitutes "the dangerous point of network convergence", or for that matter, what constitutes convergence (I'm sure we have close to a common understanding, but its worth making that explicit). In any event, can you be more explicit about what you mean here? Thanks, Dave