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Re: DS3 encapsulated in OC3c?

  • From: Neil J. McRae
  • Date: Fri Sep 21 04:32:20 2001

I was going to suggest UTI but I don't think it supports DS-3 serial maybe worth speaking to cisco to see
if they have done anything with DS3 ports. as they support T1, Ethernet and

Xylan used to do a pizza box switch that did DS-3 Circuit emulation
over ATM.


> All,
> I'm about to bring up a transatlantic 622M circuit, and am stuck with an 
> annoying SDH/SONET problem.
> We use the Cisco 15454 SONET mux on our network, and although we'd ordered 
> a SONET OC12 circuit, we've since been told that it'll actually be an SDH 
> STM-4 circuit. This shouldn't be a problem, as the carrier can convert 
> from SDH to SONET at their handoff, or we can convert from SDH to SONET on 
> the way into the 15454. However, unfortunately both solutions leave us in 
> the situation where the smallest SONET unit we can use is an STS-3c - and 
> we need at least one DS3 circuit running over this.
> So, I'm stuck trying to carry a DS3 in an STS-3c carrier (or, another 
> similar solution).
> Does anyone have any suggestions for a "cheap" box that will do this - 
> without getting into buying a full SDH mux?
> Thanks,
> Simon
> -- 
> Simon Lockhart                       |   Tel: +44 (0)1737 839676 
> Internet Engineering Manager         |   Fax: +44 (0)1737 839516 
> BBC Internet Services                | Email: [email protected] 
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