scope:

This ETS specifies the Integrated Services Digital Network Programming Communication Interface (ISDN PCI) for the accessing and administering of the following ISDN services:

- Bearer Services (as defined in ETS 300 102-1 [2]);

- Supplementary Services (as defined in ETS 300 196);

- Virtual Circuit (VC) or Permanent Virtual Circuit (PVC) Bearer Services on the B- and D-channels.

The PCI defined in this ETS:

- covers both Basic and Primary rate ISDN access;

- is independent of operating system, hardware and programming languages. It provides language and operating system binding for common operating system environments;

- supports concurrent applications;

- supports concurrent protocol stacks related to data exchange;

- supports application access to multiple channels on multiple ISDN accesses;

- provides the Open Systems Interconnection (OSI) connection-mode network service as defined by CCITT Recommendation X.213 [7] using the method defined in ISO 9574;

- provides an interface for applications requiring direct control of ISDN services;

- shows the impact of security issues on the interface;

- has been defined to allow future extension of functionality.