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Re: [EFM] RE: Pause frame usage in transport networks



Roy Bynum wrote:

> Regardless of the protocol that is used, all TDM transmission facilities
> induce a 125us latency variance at the customer data link layer.  This is
> because the transmission convergence mapping is based on a specific payload
> window that occurs every 125us  in SONET framing.

Roy,

I don't think this statement is quite correct as not the entire 125us frame needs
to be mapped/switched at once. Current generation SONET/SDH framing/switching
equipment have a latency variance that is an order of magnitude less than the
125us frame interval.

Regards, Siamack

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