Compaq OSI/FTAM D43, OSI/APLMGR D43 manual An Ftam Service Using Four Primitives

Introduction to the Compaq FTAM Responder FTAM Applications

responder, you use the standard FTAM file-handling conventions to perform remote file- handling tasks, by means of the FTAM interface on your remote system.

Each FTAM service, or file operation, requires that multiple FTAM protocol operations be performed, in sequence, to complete the service. For example, to open a file, an FTAM application must first send an initialize request, and then a file-select request and a file-open request, to the responding system in the communication. The responding FTAM node receives the requests as indications and sends responses back to the requesting node. The requesting node receives these responses as confirms. Thus, four primitives—request, indication, response, and confirm—are used to complete most services, as shown in Figure 1-1. Section 4 identifies the FTAM services supported in the Compaq FTAM implementation.

Figure 1-1. An FTAM Service Using Four Primitives

Initiating

Process

F-XXX request

F-XXX confirm

Responding

Process

F-XXX indication F-XXX response

CDT 203.CDD

The ISO standard provides flexibility in the level of FTAM function that must be implemented in an ISO-conformant system. This flexibility implies that, as you write and test your application, you need to consider the specifications for the other FTAM implementations with which your application will interoperate. Refer to Section 2 for information about the factors to consider in assessing the interoperability of the Compaq FTAM product with other FTAM implementations.

If your remote FTAM application also runs on a Compaq system, you use the Compaq FTAM application program interface (API), a set of procedures that interact with the Compaq FTAM initiator process, to request FTAM services. The initiator, in turn, sends requests for file-handling services to remote responders. The FTAM API is described in detail in the OSI/FTAM Programming Reference Manual and the OSI/FTAM Programming Guide.

OSI/FTAM Responder Manual—425199-001

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