T1E1.4/94-006 is not an ANSI standard but a contribution from a
Committee T1 member to working group 4 of subcommittee T1E1, made
in 1994. I am not sure of the status of that document, but would
guess that by now it is a standard or never made it.
Bill Buckley was the chair of T1E1 or some of its working groups
having to do with this and should be able amplify on the topic.
In a speech Bill gave in March, he said:
(1) Repeaterless T-1 -- Uses 2B1Q line code like Basic rate ISDN
- 12000 feet without repeaters
- Deploying about 150.000 circuits per year in the US
(2) Telco owns both ends of the connection (no CPE)
(3) No ANSI Standard or Bellcore TR exists
- There is a Committee T1 Technical Report that does not
address interoperability
(4) Applications could include 1/2 HDSL for PCS cells
(5) Should be transparent to the user
- Provides better BER thna conventional repeaters
- Provides ANSI T1.403 or T1.408 Interface
(6) Vendors include ADTRAN, PairGain, ADC, Alcatel and others
There you have it, everything you ever wanted to know about HDSL.
Bill is also a store of knowledge on ADSL, ATM, Frame Relay, SMDS
and other advanced technologies.
Ciao,
Vic Boersma
---------- Forwarded Message ----------
From: Tony D. Phan, INTERNET:[email protected]
TO: (unknown), INTERNET:[email protected]
DATE: 30/07/96 19:25
RE: Re: ANSI HDSL specification
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From: [email protected] (Tony D. Phan)
Subject: Re: ANSI HDSL specification
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Try
Bellcore
TA-TSY-001210,
TR-TSY-000063 (Network Equipment BuildingSystems Generic Equipment
Requirements) and
TR-TSY000499 (Transport System Generic Requirements). It may call out ANSI
specs
in the references section.
You might want to look into ADSL/VDSL as well.
Good luck,
Tony
>Dear Treggers,
>
>Mel Pedersen of Midcom asks:
>
>" Is there an ANSI HDSL specification? A customer of mine referenced ANSI
>T1E1.4/94-006 but I have not been able to find it. This specification would
>recommend such things as a pulse template, return loss, balance, etc.
>I have inquired at ANSI's web site, but to no avail."
>
>I have a copy of a Bellcore Technical Advisory dated October 1991:
>TA-NWT-001210
>"Generic Requirements for High-Bit-Rate Subscriber Lines" (a module of TSGR,
>FR-NWT-000440). Undoubtedly, this document has been since revised. The document
>describes the physical signal characteristics, etc. The Bellcore document also
>refers to ANSI TI-601-1988, TI.403-1989 and TI.408-1990, which if I'm not
>mistaken are specifications for ISDN. Indeed, it seems to me that the physical
>interface is exactly the same as primary rate ISDN.
>
>Hope this helps.
>
>Best regards,
>
>David Drori
>
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