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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 | |
| Internet: www.adsl.com | |
| Tel: (510) 608-5905 | |
| Fax: (510) 608-5917 |
| ANSI | American National Standards Institute (ANSI) |
|---|---|
| 11 West 42nd Street | |
| New York, N Y 10036 | |
| Internet: www.ansi.org | |
| 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 | |
| Internet: www.telcordia.com | |
| 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 | |
| France | |
| Internet: www.etsi.org | |
| 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 | |
| Internet: www.ieee.com | |
| 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 | |
| Switzerland | |
| Internet: www.itu.int | |
| Tel: +41 22 730 5857 or +41 22 730 5859 | |
| Fax: +41 22 730 5853 |
