Switch transmitters, what are they? -- Update

On June 6, you answered a question regarding switch transmitters. You incorrectly stated that the McData ED-6064...

"...uses a 'central memory' architecture..." and "The shared memory resides in the CMM (controller cards). The receiving port stores the received data in a buffer in the shared memory and signals the connected port to retrieve that data by a message handled by the MPC Card."

The only McData product that uses this technology is the ED-5000 (the predecessor to the 6064). All other McDATA products (except the new 4500) use a dual serial crossbar architecture -- they do not contain CMMs or MPCs.

I stand corrected. I rechecked. The ED-6064 uses CTP cards and FPM cards. I must have been looking at an older manual.


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This was first published in November 2002

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