[38624] in North American Network Operators' Group
Re: SONET and full duplex
daemon@ATHENA.MIT.EDU (Vinay Bannai)
Fri Jun 8 13:53:07 2001
Date: Fri, 08 Jun 2001 10:58:27 -0700
From: Vinay Bannai <bannai@pacbell.net>
To: Joao Takeda <joao_takeda@optiglobe.com.br>
Cc: "'nanog@merit.edu'" <nanog@merit.edu>
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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
