Date: Tue, 29 May 2001 20:05:19 -0400 From: Bill Vermillion <bill@wjv.com> To: Laurence Berland <stuyman@confusion.net> Cc: bv@wjv.com, Colin Campbell <sgcccdc@citec.qld.gov.au>, Christophe Prevotaux <c.prevotaux@hexanet.fr>, deepak@ai.net, questions@FreeBSD.ORG, isp@FreeBSD.ORG Subject: Re: OC48 interface Message-ID: <20010529200519.B11016@wjv.com> In-Reply-To: <3B1406F2.E4DCBD0F@confusion.net>; from stuyman@confusion.net on Tue, May 29, 2001 at 03:30:42PM -0500 References: <3B12CBBE.567B1A8D@confusion.net> <Pine.BSF.4.33.0105291136060.90725-100000@guru.citec.qld.gov.au> <20010529003126.C3968@wjv.com> <3B1406F2.E4DCBD0F@confusion.net>
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On Tue, May 29, 2001 at 03:30:42PM -0500, Laurence Berland thus sprach: > > > > > However in the US [I don't know abou elsewhere] there is no OC-1. > > No OC-9, 18, 34, or 36. > > > > 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. > > > > Bill > /me, who isn't as familiar with SONET as he'd like to be, doesn't > understand why OC-768 will not be used when it becomes needed. > What am I missing? I'm still learning all this too but from what I've read the opinions are the OC-768 won't happen because SONET is a TDM [Time Division Multiplexing] method and carries a lot of overhead with it. Speeds will be there, but it just won't be SONET. I remember sitting through some tutorials about 2 years ago - and Ciena was calling all the SONET upgrades 'fork lift upgrades' because it doesn't upgrade that well. It makes sense. I know that were I have some machines located [in a Level 3 facility] they say their goal is to drop all SONET and become a pure IP transport. If I'm mis-understanding this, please let me know. Bill -- Bill Vermillion - bv @ wjv . com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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