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RE: 2 Wire T1 - HDLC
From: "Martin, Christian" <cmartin () gnilink net>
Date: Tue, 15 May 2001 01:07:10 -0400


I believe you are referring to HDSL2, which can and does run over
single-pair but uses advanced spectral shaping and error correcting
mechanisms that weren't invented when HDSL was dreamed up by Bellcore.


-----Original Message-----
From: John A. Tamplin [mailto:jat () liveonthenet com]
Sent: Monday, May 14, 2001 7:13 PM
To: Hunter Pine
Cc: mike harrison; nanog () nanog org
Subject: Re: 2 Wire T1 - HDLC

On Mon, 14 May 2001, Hunter Pine wrote:

That was my mistake Mike. HDSL is NOT two SDSL lines by 
definition. It's
just two circuits running symmetric 768k DSL (not SDSL) 
bonded to form a
single1.5mb line.

Umm, no.  HDSL rides a single pair, and provides more than 1.5Mb.

John A. Tamplin                                       jat () jaet org
770/436-5387 HOME                             4116 Manson Ave
770/431-9459 FAX                              Smyrna, GA  30082-3723

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