The present document specifies the combination of base standards, together with the selection of appropriate options
and parameter values, necessary to specify how QSIG/PSS1 can be used to provide digital signalling capabilities
between Private Integrated services Networks eXchange (PINX) in an Air Traffic Services (ATS) PISN.
The present document defines:
- physical and electrical characteristics (physical layer) of the interfaces to the transmission systems to be
employed;
- data link layer procedures to ensure error-free communications links;
- network layer procedures for call establishment and clearing; and
- supplementary services to meet specific ATS requirements.
The present document states requirements upon implementations in order to achieve interoperability between equipment
in ATS PISNs.
NOTE 1: Implementation of the present document does not preclude a manufacturer from offering other means of
interconnection.
The present document does not specify requirements related to interworking between QSIG and other signalling
systems used in ATS PISNs.