scope:

General

An ISDN is intended to support a wide range of new and existing terminals (TE1, TE2 + TA, NT2) of various capabilities and designed for different access interfaces. This is necessary to permit a full application of the ISDN service potential.

The purpose of this Recommendation is to provide direction to the potential functional requirements which may be called upon for any specific terminal. The terminal functions used are more specific examples of the general functions described in Recommendation I.310. In this issue of the Recommendation, it is primarily directed at the TE1 and TA devices operating at the basic rate.