Information systems interconnection — Digital data circuit (CSDN) — Provision of the OSI connection-mode transport service in the T.70 case for Telematic end systems
This Functional Standard defines:
- the provision of the OSI Connection-mode Transport Service for Telematic Services between a Telematic End System ("The Reference Telematic End System') attached to a Permanent or Switched Data Circuit, and another Telematic End System ("The Compatible Telematic End System') which is attached to the same Data Circuit, or indirectly accessible through a Network Interworking function or interworking arrangement providing support for the Telematic Services. This Transport Service is provided by a protocol which is compatible with that defined in Network Independent Basic Transport Service for the Telematic Services [T.70].
- the provision of a connection-mode network service that satisfies the requirements of [T.70].
Note: See Combined Functional Standards C/1X3 for its use in the context of such telematic services.
Note: Conformity to this Functional Standard does not imply provision of all features of the OSI Connection-mode Network Service, and consequently interworking capabilities are limlted outside the Telematic Services (e.g. it does not support the NSAP addressing scheme) with other Functional Standards.
This Functional Standard specifies a set of protocols to provide the function defined above. It does not specify total End System capability. The requirements placed on an End System In this Functional Standard are solely those necessary for operation of the protocol set specified.