Committee T1

Sponsored by the Alliance for Telecommunications Industry Solutions and accredited by ANSI for interoperability standards.
http://www.t1.org/

T1 T-extender

DCB's T1 repeater for customer-owned cable.
http://www.dcbnet.com/datasheet/textds.html

DCB's T1 Info

All you wanted to know about T1's but were afraid to ask.
http://www.dcbnet.com/notes/9611t1.html

Network and Services Integration Forum

Provides an open industry forum for the discussion and resolution of multiple technology integration and SONET interoperability issues.
http://www.atis.org/atis/sif/sifhom.htm

SONET/SDH Technical Summary

Defines SONET and SDH, and provides references to appropriate standards organizations.
http://www.techfest.com/networking/wan/sonet.htm

EverythingT1.com

Offering T-1/T-3 information, glossary, FAQs, reference, Technical reports, news, messageboard, ISP lists and links.
http://www.everythingt1.com/

T-1 Carrier

Webopedia definition and links about T1.
http://webopedia.com/TERM/T/T_1_carrier.html