NNSCs are also supported on the Passport 8600 Routing Switch, BayStack 470 Switches, and the BayStack Business Policy Switch.

Newer Gigabit Ethernet MDAs

The BayStack 460 Switch supports the latest Gigabit MDAs. Each of these MDAs will support eight output queues and support traffic shaping. The three MDAs are:

•BPS2000-1GT 1-port 1000BASE-TX MDA

•BPS2000-2GT 2-port 1000BASE-TX MDA

•BPS2000-2GE 2-port Small Form Factor

GBIC MDA

With the dual-port small form factor GBIC MDA, you can plug up to two small form factor pluggable GBICs. There are three types of small form factor pluggable GBICs to choose from:

•1-port 1000BASE-SX Small Form Factor GBIC (LC connector)

•1-port 1000BASE-SX Small Form Factor GBIC (MT-RJ connector)

•1-port 1000BASE-LX Small Form Factor GBIC (LC connector)

New CWDM small form factor pluggable GBICs can also be used with the two-port small form factor GBIC MDA. With CWDM, a customer can dramatically increase the bandwidth supported over a single fiber. Instead of 1 Gigabit per fiber connection with a CWDM GBIC, eight wavelengths can be supported per fiber. In other words, eight gigabits of traffic can

be supported across one single mode fiber. There are eight different wavelength GBIC options for 40 km and eight different wavelength GBIC options for 70 km.

Traffic policing

Traffic policing enables provisioning of different levels of service by limiting traffic throughput at the ingress (incoming) port of the BayStack 460 Switch. For example, if a port is set to a certain speed such as

10 Mbps, all traffic under 10 Mbps on that port will pass, and traffic that exceeds 10 Mbps on that same port is dropped. Service providers will find this especially useful to control bandwidth to their customers.

IP traffic shaping

IP traffic shaping offers the ability to smooth IP classified traffic from the Gigabit uplink ports of a single BayStack 460 Switch. While traffic policing is needed to provide different levels of service to data streams on the ingress ports, traffic shaping is needed to smooth the traffic on the uplink connection from the BayStack 460 Switch to the network core, yielding the most efficient bandwidth utilization. Service providers or carriers utilize this feature when they are selling Ethernet in place of traditional Frame Relay, ISDN, or ATM WAN access solutions. Some enterprise customers use traffic shaping as a mechanism to limit bandwidth without having to swap out physical interfaces, leaving them room to grow.

Summary

With more than 100 years in telecommu- nications, Nortel Networks is uniquely positioned to help your business reduce costs by combining voice and data into an integrated system. Why take a chance on a vendor that only understands part of the equation? Let us show you how the BayStack 460 Switch—along with other Nortel Networks products—can increase your profitability, streamline your business operations, increase productivity, and help you gain the competitive edge.

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