Information technology. International Standardized Profiles TB, TC, TD and TE. Connection-mode Transport Service over connection-mode Network Service. Part 7: Definition of profiles TD1111/TD1121
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.
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 standadized connection-mode Network Service can be made available.
This part of ISO/IEC ISP 10609 specifies the definition of Profiles TD1111/TD1112. The TD1111/TD1112 are profiles in the TD group which uses Transport protocol class 0.
1.2 Position of Profiles within the Taxonomy
ISO/IEC ISP 10609ISP 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 Profiles TD1111/TD1121.
These profies may be combined with any A-profile at the A/T boundary.
1.3 Scenario
Figure 1 illustrates the end system configurations to which TD1111/TD1121 profiles are applicable.
TD1111/TD1121 Reference End System Remote End System
PSDN **
TD1111/TD1121
Reference Point
Other network equipment none
OSI relays other equipment
Figure 1 - Scenario of Applicability of the TD1111/TD1112 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 - TD1111 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 - TD1121 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.