Information technology. International Standardized Profiles TB, TC, TD and TE. Connection-mode Transport Service over connection-mode Network Service. Part 6: Definition of profiles TC1111/TC1121
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 specifies 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/TC1112 profiles are applicable.
TC1111/TC1121 Reference End System Remote End System
PSDN **
TC1111/TC1121
Reference
Point Other network equipment none
OSI relays other equipment Figure 1 - Scenario of Applicability of the TC1111/TC1121 Profiles
This part of ISO/IEC ISP 10609 specifies the required functions from the supporting protocol stack shown in tables 1 and 2.
Table 1 - TC1111 Profile protocol stack for end system
Transport Layer ISO/IEC 8073
Network Layer ISO/IEC 8208, ISO 8878
Data Link Layer ISO 7776
Physical Layer X.25 dedicated access via PSTN
Table 2 - TC1121 Profile protocol stack for end system
Transport Layer ISO/IEC 8073
Network Layer ISO/IEC 8208, ISO 8878
Data Link Layer ISO 7776
Physical Layer X.25 dedicated access via Digital Data Circuit
This part of ISO/IEC ISP 10609 does not specify the required functions for relays.