2 Wire T1 - HDLC

Tue May 15 05:07:10 UTC 2001

John, 

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.

./chris

> -----Original Message-----
> From: John A. Tamplin [mailto:jat at liveonthenet.com]
> Sent: Monday, May 14, 2001 7:13 PM
> To: Hunter Pine
> Cc: mike harrison; nanog at 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 at jaet.org
> 770/436-5387 HOME				4116 Manson Ave
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> 
> 