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From: "Deepak Jain" <deepak@ai.net>
To: "Nick Rogness" <nick@rogness.net>, <bv@wjv.com>
Cc: "Colin Campbell" <sgcccdc@citec.qld.gov.au>,
	"Laurence Berland" <stuyman@confusion.net>,
	"Christophe Prevotaux" <c.prevotaux@hexanet.fr>,
	<questions@FreeBSD.ORG>, <isp@FreeBSD.ORG>
Subject: RE: OC48 interface
Date: Tue, 29 May 2001 18:58:16 -0400
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	An OC-1 is an STS-1 (DS3 with sonet info) equivalent, only
	optical.  Bill is correct about not having 9,18,34..etc because
	you can carve those out of a bigger OC-3,12,48 pipe down to the
	VT1.5 (DS1) granularity (on most transport platforms).

Most platforms above OC12 do not go below OC3 or DS3, but some newer ones
do. The vast installed base of OC12 and OC48 muxes (Lucent, Fujitsu) do not.

>
> You will see OC-3, OC-12, OC-48 and OC-192.  There is doubt that the
> OC-768 will have wide distribution - that about 40Gbs - because it's
> part of the SONET and TDM methods, it's not going to to see much
> acceptance.

	What will be seen in the data world is 10Gb Ethernet which is
	equivalent to an OC-192.  10Gb Ethernet should not
	use SONET technology but plug directly into your WDM system taking
	a lambda.

This is ignoring 10GbE over copper, but its the same idea. The WDM gear will
support both OC192 and 1/10 GbE. Gear from Sycamore supports 1GbE and
POSIP/SONET in the same box.

Deepak Jain
AiNET



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