Compaq OSI/FTAM D43, OSI/APLMGR D43 manual

Compaq FTAM Responder Operation Responder Data Flow

2.The FTAM initiator follows the OSI protocol established on the initiating system to send the outgoing FTAM protocol data unit (PDU) over the network to the Compaq responding system, where it is received as an indication.

3.Once on the Compaq responding system, the incoming FTAM indication is sent through the NSP, TSP, and TAPS processes, where it is formatted and processed as required by each OSI layer.

4.After processing the indication, the TAPS process sends the PDU through the OSI/AS API to the protocol state machine of the responder.

5.The protocol state machine decodes and checks the validity of the indication and, if the indication is valid, performs the requested action, communicating with the VFS where file-system access is required.

6. .The VFS accesses the file system via standard procedure calls and informs the protocol state machine when the requested file-system actions are completed.

7.Based on the outcome of the file-system actions, the protocol state machine encodes and sends a response PDU to the TAPS process for transmission to the FTAM initiator. This response contains any diagnostic messages resulting from its checking of FTAM protocol or from VFS communication with the file system.

8. .The TAPS process formats the PDU and forwards it to the TSP process. The TSP process, in turn, formats the PDU and sends it to the NSP process. The NSP process, depending on the network protocol that it supports, formats the PDU and forwards it via the appropriate controller (or adapter) over the network to the initiating system, where it is received as a confirm.

OSI/FTAM Responder Manual—425199-001

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