I need to connect two Nortel OPTera 3400 or 3500 boxes, running OC-12 SONET
on their line side, through a provider's SDH network.   The SDH network is
using AU4 Concatenated.   What would be required to pipe the OC-12 SONET
through such a network?

-- 
Will
westes AT earthbroadcast.com

Hello Westes,

You wrote:

> I need to connect two Nortel OPTera 3400 or 3500 boxes, running OC-12 SONET
> on their line side, through a provider's SDH network.   The SDH network is
> using AU4 Concatenated.   What would be required to pipe the OC-12 SONET
> through such a network?

The first step is easy, connect the OC-12 line side to
an STM-4 tributary port on the SDH NE.

But then it depends on the structure of the payload in
the OC-12 and the capabilities of the SDH NE if it will
work.

If the OC-12 contains an STS-12c SPE and the SDH NE supports
VC-4-4c there is no problem.

If the OC-12 contains 4 STS-3c SPE and the SDH NE supports
VC-4 there is no problem.

If the OC-12 contains STS-1 SPE and the SDH NE can remap
the STS-1 SPE (i.e. an AU3) into a TUG-3 there is no
problem.

In all other cases you have a problem.

Cheers, Huub.

-- 
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