Digital signal transmission od Bissell, C. C. (Chris C.)

Advances in integrated services digital networks (ISDN) and broadband ISDN od Stallings, William

ISDN explained worldwide network and applications technology od Griffiths, J. M. (John M.)

Integrated services digital networks architectures, protocols, standards od Helgert, Hermann J.

ISDN systems architecture, technology, and applications

ISDN an introduction od Stallings, William

ISDN design a practical approach od Hardwick, Steve

Available for University of the Philippines System via ScienceDirect. Click here to access
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ISDN an introduction. od Stallings, William

The integrated services digital network from concept to application od Ronayne, John

An Information System Study on the Billing and Collection System of Luzon Integrated Services, Inc.