scope:

Scope and purpose

This standard defines the usage, format, and encoding of the cause information element within the context of the Digital Subscriber Signaling System Number 1 (DSS1) of an Integrated Services Digital Network (ISDN). It also defines the meaning of specific causes, and the usage of the location and diagnostic fields.

The purpose of this standard is to allow maximum compatibility among public- and user-owned telecommunications equipment.

Application

The cause information element applies to both Basic and Primary Rate Interfaces. It is used in the signaling of basic circuit and packet mode bearer services, as well as ISDN supplementary services. This standard is intended to be used in conjunction with other American National Standards that describe specific applications of the cause information element.