1

Scope

1.1

General This part of ISO/IEC ISP 10609 is applicable to end systems concerned with operating in the Open Systems Interconnection (OSI) environment. It specifies a combination of OSI standards, which collectively provide the connection-mode Transport Service using the connection-mode Network Service.

This part of ISO/IEC ISP 10609 is applicable to the provision of the connection-mode Transport Service in end systems attached to any type of subnetwork from which the standardized connection- mode Network Service can be made available.

This part of ISO/IEC ISP 10609 specifies the definition of Profiles TC1111/TC1121. The TC1111/TC1121 are profiles in the TC group which uses Transport protocol classes 0 and 2.

1.2

Position of Profile within the Taxonomy ISO/IEC ISP 10609 covers the taxonomy elements identified as ""TB, TC, TD and TE"" in the ""Directory of Profiles and ISPs"" contained in ISO/IEC TR 10000-2. This part of ISO/IEC ISP 10609 specif ies the definition of Profile TC1111/TC1121.

These profiles may be combined with any A-profile at the A/T boundary.

1.3

Scenario Figure 1 illustrates the end system configurations to which TC1111/TC1121 profiles are applicable.

This part of ISO/IEC ISP 10609 specifies the required functions from the supporting protocol stack shown in tables 1 and 2.

This part of ISO/IEC ISP 10609 does not specify the required funct ions for relays.