- Data Communications > Digital Hierarchy

Sponsored by the Alliance for Telecommunications Industry Solutions and accredited by ANSI for interoperability standards.

All you wanted to know about T1's but were afraid to ask.

Offering T-1/T-3 information, glossary, FAQs, reference, Technical reports, news, messageboard, ISP lists and links.

Provides an open industry forum for the discussion and resolution of multiple technology integration and SONET interoperability issues.

Defines SONET and SDH, and provides references to appropriate standards organizations.

Webopedia definition and links about T1.

DCB's T1 repeater for customer-owned cable.