Frame relay NNIs in the cross-fire

By David Rohde, Network World |  Networking

Make no mistake, says Taylor: NNIs can save carriers and users money. That's because if a user organization employs frame relay access from a local carrier to reach the long-distance carrier's frame relay switches, it avoids often-expensive leased-line dedicated access at 56K bit/sec or T-1 speed.

In fact, a shared NNI "could actually give you a better performance" than some of the connections on a single carrier's network, Taylor says. That's because if carriers set up the NNI with many users in mind - say, a T-3 link -- the mathematics of statistical multiplexing work in your favor and it's very unlikely that the NNI will be a bottleneck, as opposed to a 56K bit/sec branch-office connection that could max out with bursty traffic.

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