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Re: Why not have both?

One question on the number.

According to my calculation, with OC192

    - The Gross rate is        9.95328  Gbps

    - The SPE rate is          9.621504 Gbps

    - The user data rate is    9.510912 Gbps

Where does the number 9.548 come from? We've been talking about the pure user
payload, so I'd pick 9.510 Gpbs Ethernet NRZ rate.

I should be mistaken somewhere. Would you please correct me?

Edward Chang wrote:

> Roy:
> Thanks for proposing a simple WAN/PHY specification.  We can move on from
> here to generate a complete specification for HSSG.
> I like the fact that your WAN/PHY is based on OC-192C signaling standard,
> which is widely implemented in the marketplace - Light SONET.
> Your proposal, surely, is a simple, bare-bone overhead, which I think will
> do the job.
> Nevertheless, if there is any other proposal, we should also discuss it.
> Also, it is the time to start deal with those issues: 9.548...Gbps NRZ
> scramble data, data rate conversion scheme (10.000/9.548.Gbps), framing,
> recovered clock characteristics (should meet SONET jitter-transfer,
> jitter-tolerance, and jitter-generation? Probably not), clock frequency
> tolerance (100 ppm?), data jtter characteristics, BER, fault reporting,
> SERDES, target distance (40 km max?), media......etc.

Dae Young KIM