[2953] in North American Network Operators' Group
Re: PPP over SONET
daemon@ATHENA.MIT.EDU (Peter Lothberg)
Mon May 20 12:57:31 1996
Date: Mon, 20 May 96 18:54:34 MET DST
From: Peter Lothberg <roll@stupi.se>
To: Camil Samaha/TEIR/Thomson <Camil_Samaha@teir.com>
Cc: nanog <nanog@merit.edu>
In-Reply-To: Your message of 20 May 96 11:33:14
> I've been doing a lot reading the last few days on the advantages of "PPP over
> SONET/SDH" vs "IP over ATM AAL5". The available information bandwidth of
> roughly 150 Mbps out of 155.5 Mbps with STS-3c/STM-1 makes the PPP over SONET
> solution very attractive.
Speaking SDH, it's VC4, so payload is 139.264Mbit (STS-3c SPE)
> I understand that SONET facilities are widely
> deployed throughout the carriers' broadband infrastructures but when will it
> become practical to run packet data over these facilities? I am aware that
> Cisco is planning to provide an OC-3/STM-1 interface in the 3d quarter but what
> about other hardware vendors?
> When will carriers be ready to support this service?
It's possible today, it's a matter of tariff, any SDH/Sonet network is
capable of doing this.
> Are multiplexers available or planned for the near future?
You can't do subrates, the rest is standard tranmission gear avaliable
from a variety of vendors.
> Are there carrier-to-carrier issues that need to be worked out?
It depends if you are buying this as a circiut within a network or as
two half circiuts. If you are obtainging two half-circiuts the two
corresponding carriers have to work out the maintenence procedures.
--Peter
Ps: ATM, what's that?
