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Technology Stocks : The *NEW* Frank Coluccio Technology Forum -- Ignore unavailable to you. Want to Upgrade?

To: Frank A. Coluccio who wrote (3407)	7/22/2001 3:10:38 AM
From: elmatador	Read Replies (1) \| Respond to of 46821

The copper plant has no redundancy at all. You can cut a primary cable with 1800 pairs tomorrow morning and you can do pretty big damage to a lot of data links in some leased lines. It is more difficult and time consuming to splice a copper cable a few fiber strands. If redundancy was so important, then the copper plant have reached its technical obsolescence and would have started to be replaced by now. But not only this is not happening, and even without any redundancy at all its is being used (or touted) for xDSL transport. Rhythms, Covad and Northpoint didn't go belly up due to lack of redundancy. Redundancy in high capacity optical transport? Yes. We even back them up with microwave links. Redundancy in optical access? This sounding more as a marketing strategy for optical vendors to persuade operators to light more fibers than necessary. I anyone persuade me that optical access needs redundancy I start saying that the xDSL is dead due to non-redundancy.

To: Frank A. Coluccio who wrote (3407)	7/22/2001 7:47:26 PM
From: ahhaha	Read Replies (1) \| Respond to of 46821

Constraint-based routing is used today for two main purposes: traffic engineering and fast reroute. With suitable network design, the constraint-based routing of IP/MPLS can replace ATM as the mechanism for traffic engineering. Likewise, fast reroute offers an alternative to SONET as a mechanism for protection/restoration. Both traffic engineering and fast reroute are examples of how enhancements provided by MPLS to IP routing make it possible to bypass ATM and SONET/SDH by migrating functions provided by these technologies to the IP/MPLS control plane