OSI/TS Configuration and Management Manual

OSI Transport Services
OSI/TS Configuration and Management Manual—424831-001
5-2
Transport Service Primitives
The following list describes the service-primitive parameters:
Table 5-1. OSI/TS Service Primitives
Connection Phase Primitive Types Parameters
Connection
Establishment
T-CONNECT Request and
indication
Called address
Calling address
Expedited data
Quality of service*
Transport user data
T-CONNECT Response and
confirmation
Responding address
Expedited data
Quality of service*
Transport user data
Data Transfer T-DATA Request and
indication
Transport user data
T-EXPEDITED DATA Request and
indication
Transport user data
Connection
Release
T-DISCONNECT Request Transport user data
T-DISCONNECT Indication Disconnect reason
Transport user data
*OSI/TS does not implement the quality-of-service parameter.
Called address
Specifies the transport service access point (TSAP) address
of the responding (remote) transport user.
Calling address Specifies the TSAP address of the initiating (local)
transport user.
Expedited data Requests transport-expedited data service. This service
bypasses normal Transport Layer, flow-control
mechanisms. It is available in classes 1, 2, 3, and 4.
The transport-expedited data option does not imply
network-expedited data service. Network-expedited data
service is not used.
If the expedited data option is not selected in the connect
indication, it cannot be selected in the response. If it is
selected in the indication, the responder can reject it by not
selecting it in the response. If expedited data is not
negotiated and an application attempts to send it, OSI/TS
returns file-system error 2 (invalid operation).
Quality of service Specifies a set of parameters. Each parameter represents a
characteristic that affects the quality of a transport
connection. These characteristics include throughput,
transit delay, residual error rate, and failure probability.
The parameters are available for the transport entity to use
while negotiating the transport class. OSI/TS does not
supply or respond to quality of service parameters.