Meaning of NI1 in English

Abbreviation for National ISDN 1. NI1 is a specification for a standard ISDN line. The goal is for National ISDN 1 to become a set of standards which every manufacturer can conform to. For example, ISDN devices that conform to the National ISDN 1 standard will work, regardless of the central office the customer is connected to. Future standards, denoted as NI2 and NI3, are currently being developed.

DAX English glossary of key connectivity terms.      Английский глоссарий основных терминов по коммуникациям DAX.