[c-nsp] Re: T1 circuits over OC3

Jay Ford jay-ford at uiowa.edu
Fri Oct 1 10:01:49 EDT 2004

On Fri, 1 Oct 2004, Andy Dills wrote:
> I don't think they wanted to use an ATM T1, as nobody wants the cell loss
> on low speed links like that. And few people have that type of CPE
> equipment laying around.

I'm not talking about ATM on T1.  I'm talking about T1 on ATM.  The CPE
interface is plain old T1 at both ends.

> See, I thought the requirement was for terminating a traditional leased
> line, for instance using HDLC or PPP, but just accepting the T1 over the
> ATM.  Similar to a channelized DS3.

Yeah, I wasn't figuring delivering the T1 at the edges via ATM, just over ATM
in the cloud.

> That's L1, I'm talking L2.

The upper layers are whatever you want.  It looks like a real T1 to the gear
at the edges.

Jay Ford, Network Engineering Group, Information Technology Services
University of Iowa, Iowa City, IA 52242
email: jay-ford at uiowa.edu, phone: 319-335-5555, fax: 319-335-2951

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