The upgrades that are currently taking place are to provide ADSL
conforming to ITU G.992.1 / ANSI T1.413-1998 (full rate ADSL standards).
 G.992.1 has been pre-published, but is not in force, the ANSI spec has
been published. I've seen about 20 odd different modems work with our
DSLAMs at a physical level, AFAIK most worked properly at higher layers
also.

The 'old ADSL' (i.e. works with M10's) was ANSI T1.413 (issue 1)
compliant - however although this was a standard for ADSL, it never
resulted in a lot of interoperability between different vendors. Hence
the change now - one of the penalties for being an early adopter of a
technology.

ADSL is inherently rate adaptive (in 32 kbit/s steps). RADSL and ADSL
generally refer to the same thing. In the very early days, some ADSL
implementations of ADSL had to be manually provisioned to a particular
line rate - hence the 'R' when this became an automatic thing.

Cheers,
Jonny Martin,
Broadband Technology
Telecom New Zealand Ltd.

>>> "Sean Glasspool" <s.glasspool@braemac.co.nz> 11/09/00 03:44 >>>
Full rate ADSL hasn't even been ratified as an international standard
yet.
And telecoms ADSL is RADSL which is a non-standard form of ADSL.

Sean Glasspool
Account Manager
mailto:s.glasspool@braemac.co.nz

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Received on Fri Nov 10 09:08:12 2000