Any network architecture must follow some set of protocols. On the one hand, the set of protocols may be homegrown - that is, specified by the designer of the network. On the other hand, the set of protocols may conform to a recognized, published set of standards.

Each flavor of DSL has its own set of standards to which it conforms, a situation made all the more complex in symmetric DSL by the difference in standard transmission speed between North America (T1, 1.544 MBPS) and Europe (E1, 2.048 MBPS).

A discussion of these published standards is well beyond the scope of the present work. However, the interested reader may order them from several sources. Several are listed below. When calling these organizations, it will be worth your while both to order a catalog and to request inclusion on their update services. This will allow you to keep informed of new standards and of supplements to existing ones as they are approved.

ADSL Forum The ADSL Forum
39355 California Street, Suite 307
Fremont, CA 94538
Tel: (510) 608-5905
Fax: (510) 608-5917

ANSI American National Standards Institute (ANSI)
11 West 42nd Street
New York, N Y 10036
Tel: (212) 642-4900
Fax: (212) 398-0023

Bellcore Direct Sales
Telcordia Technologies, Inc. [Formerly Bellcore]
8 Corporate Place, PYA 3A-184
Piscataway, NJ 08854-4156
Tel: (800) 521-2673 (U.S. and Canada)
Tel: (732) 699-5800 (International)
Fax: (732) 336-2559

ETSI European Telecommunications Standards Institute (ETSI)
650 route des Lucioles
06921 Sophia Antipolis Cedex
Tel: +33 (0) 4 92 94 43 95/43 64
Fax: +33 (0) 4 93 65 47 16

IEEE IEEE Customer Service
445 Hoes Lane
PO Box 1331
Piscataway, NJ 08855-1331
Tel: (800) 678-4333
Tel: (908) 562-1393
Fax: (908) 981-9667

ITU International Telecommunication Union (ITU)
Telecommunications Standardization Bureau (TSB)
Place des Nations
CH-1211 Geneva 20
Tel: +41 22 730 5857 or +41 22 730 5859
Fax: +41 22 730 5853

Please make a selection.