Re: SONET and full duplex

["Ron Buchalski" <rbuchals () hotmail com>]

Vinay,

SONET BLSR rings consist of four fibers and two full duplex paths, where the 
working path handles full duplex data, and the protect path sits idle.  When 
the working path fails, the protect path (the other full duplex path) is 
activated, and handles full duplex data.

-rb

> From: Vinay Bannai <bannai () pacbell net>
> Reply-To: bannai () pacbell net
> To: Joao Takeda <joao_takeda () optiglobe com br>
> CC: "'nanog () merit edu'" <nanog () merit edu>
> Subject: Re: SONET and full duplex
> Date: Fri, 08 Jun 2001 10:58:27 -0700
>
>
> Joao Takeda wrote:
>
> >
> >
> > Hi, ALL.
> >
> > Can anyone confirm if links using SONET are full duplex?
> > Thanks.
> >
> > Takeda.
>
> Sonet when deployed in rings tend to have dual rotating rings. Each ring 
> carries traffic in a particular direction. Each node on the ring
> transmits on one of the rings and the other ring is used for receiving.
> However when using POS links which tend to point to point, then usually 
> there are two fibers (one for transmitting and one for receiving). So to 
> answer your question, most of the SONET links are full duplex.
>
> Vinay

_________________________________________________________________
Get your FREE download of MSN Explorer at http://explorer.msn.com