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3Com
Support tips for 3Com's ISDN products.
CAPI 2.0 - the ISDN interface
COMMON-ISDN-API: CAPI - the ISDN interface
CAPI Programmer's Starting Point
Peter Zwosta's information and source code about programming the Common ISDN application interface.
Cause Codes
Netopia ISDN router information, Cause Codes or ISDN errors.
ComTel Electronic Systems GmbH
German manufacturer of ISDN routers.
Controlware GmbH
Offers ISDN backup solutions, video surveillance and fibre optic solutions, training, consultantancy, maintenance and support.
Dan Kegel's ISDN Page
Dan Kegel's ISDN Page
eyeSDN beäugt Ihren ISDN-Verkehr
Schicht-1-Monitor am S0-Bus des ISDN
Institute of Information and Computing Science
FAQs compiled from comp.dcom.isdn newsgroup.
ISDN Tutorial
A technical introduction to ISDN - history, terminology, protocol, references and ISDN book store.
isdnwatch
UK-based ISDN monitoring, analysis and management resource.
Patapsco Communications
Products include leased line backup, aggregation, protocol conversion and bandwidth on demand. Designed for commercial users, carriers and PTTs.
Phil McKerracher's ISDN tutorial
Designed to quickly bring a novice up to speed. Includes breakdown of ISDN functionality and networking.
ShareISDN
Device to share the functions of an ISDN card with other users in a network.
US West
glossary of terms used by the telco in the ISDN arena