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ISDN Protocol Administrator's and Developer's Guide ... - Intervoice

ISDN Protocol Administrator's and Developer's Guide ... - Intervoice

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12In this chapter...▼ National <strong>ISDN</strong>-2Overview, 12-2▼ National <strong>ISDN</strong>-2Configuration, 12-2▼ Defining the National<strong>ISDN</strong>-2 Subroutines, 12-7National <strong>ISDN</strong>-2 <strong>Protocol</strong>This chapter describes the National <strong>ISDN</strong>-2 protocol subroutines<strong>and</strong> configuration.<strong>ISDN</strong> use in North America began slowly, because switchmanufacturers implemented <strong>ISDN</strong> in different ways. In the early1990s, North American members of ITU-T agreed to create theNational <strong>ISDN</strong> 1 (NI-1) st<strong>and</strong>ard. NI-1 users did not need to knowwhich br<strong>and</strong> of switch was being employed to properly run asystem.National <strong>ISDN</strong>-2 is a later, more comprehensive implementationof this <strong>ISDN</strong>.60001262, First Edition 12-1

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