Re: SONET/Ethernet clock tolerance
Ishida-san:
At 11:06 AM 3/29/00 +0900, Osamu ISHIDA wrote:
>Here 10 Gigabit Ethernet will require only ONE Path STS-192c in the payload.
>I don't believe re-using expensive SONET regenerator for 10GbE is a good
>choice
>unless you have already invested in it.
Exactly, I think you hit the nail on the head. I have listened very hard
for months now to the SONET discussion and the debates on the LAN vs WAN PHY.
I have always interpreted the requirement for the so-called WAN PHY as an
installed base issue. Some WAN folks believe there is a requirement to
preserve the investment in installed SONET-TDM equipment which is driven by
a return on invested capital business model.
There are other models and other ways of building networks. It is
refreshing to hear other points of view.
Bruce Tolley
Cisco Systems