The present document specifies the network Abstract Test Suite (ATS) for the interworking between ISDN [13] and
non-ISDN access and the ISDN User Part functions and protocol of Signalling System No. 7 [2] to [5]. The
interworking between the above signalling protocols is described in EN 300 899-1 [1] and occurs in an exchange with
ISDN local exchange functionality and is specified in the context of a typical call in a pure ISDN or mixed
ISDN/non-ISDN environment. The non-ISDN access defined in the present document means the analogue line access.
The present document applies only to exchanges having implemented the ISUP V2 protocol specification.
A further part of the present document specifies the Test Suite Structure and Test Purposes (TSS&TP) related to this
ATS and partial PIXIT proforma.