Re: Span Definition

[Maarten Vissers <mvissers@lucent.com>]

Diego,

3R regeneration sites are in the OTN (G.872, G.709, G.798) represented
by the OCh termination point; i.e. when the OCh signal is terminated 3R
processing is performed including section monitoring (OTUk or OTUkV
termination). 
The OMS termination point is not associated with 3R processing. It is
only involved with optical multiplexing/demultiplexing (OCh signals are
muxed/demuxed here) and termination of the OMS trail (OMSn_TT and
OMSn/OCh_A functions). For more information on functionality of the OTN
atomic functions you can have a look at draft G.798 version 0.8.1 at
ftp://sg15opticalt:otxchange@ftp.itu.int/tsg15opticaltransport/wp3/q9/g798/g798v0_8_1.pdf

You can see the allocation of OTSn, OMSn, OCh, OTUk, etc also depicted
in slide 15 of the following OTN/G.709 presentation
ftp://sg15opticalt:otxchange@ftp.itu.int/tsg15opticaltransport/OTN/g709-intro.ppt

Regards,

Maarten

Diego Caviglia wrote:
> 
> Ling-Zhong, Jonathan
> 
>                                                  Could  you  please  review your
> definition of span accordingly to the following one?
> 
> Span  "A  span  consists  of  a  number of channels between two adjacent Optical
> Amplification sites, a Span is a part of an Optical Link"
> A Span is what in ITU-T is called OTS
> 
> Optical  Link  "An  Optical  Link  consist  of  a number of channels between two
> adjacent 3R regeneration sites"
> An Optical Link is what in ITU-T is called OMS
> 
> Regrads
> 
> Diego.
> 
> ----------------------------------------------------------------
> Diego Caviglia
> Photonic Networks Design and Modeling
> E-mail: diego.caviglia@marconi.com
> Tel: +39 0 10 6003 808
> Via A. Negrone 1A 16153 Genoa (Italy)
> http://www.marconi.com
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