Uploaded December 2017 | Updated September 2026, 2 weeks ago
From the 1990 AT&T video course on telecommunications. This is the module about ISDN or Integrated Digital Services Network. ISDN was a new end to end digital service for voice and data, at the time there where quite a few bold clams about the service. in the US it never really took off for the consumer.
From the 1990 AT&T video course on telecommunications. This is the module about ISDN or Integrated Digital Services Network. ISDN was a new end to end digital service for voice and data, at the time there where quite a few bold clams about the service. in the US it never really took off for the consumer.
