Visitor rating
An overview of the Integrated Services Digital Network (ISDN).
Telcordia Technologies, 8 Corporate Pl., Piscataway, NJ 08854-4156, Phone: (732)699-5800, Toll-free: 800-521-CORE, Fax: (732)336-2559, Email: telecom-info@telcordia.com, URL: http://www.telcordia.com
Available on VHS
Running time 15 minutes.
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