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Conformance and Interoperatility
OSI/FTAM Responder Manual—425199-001
2-2
Basic Characteristics of FTAM Implementations
When evaluating interoperability between Compaq FTAM and another FTAM
implementation, consider the following aspects in which FTAM implementations can
vary. Section 4 of this manual provides you with additional details about the Compaq
FTAM implementation that you need to determine whether another implementation can
interoperate with the Compaq FTAM product.
Basic Characteristics of FTAM Implementations
To determine whether another FTAM implementation can interoperate with Compaq
FTAM, you must first consider the following basic characteristics of the two
implementations.
Roles of Initiator and Responder
Initiator and responder roles must be compatible to interoperate successfully. For two
implementations to interoperate, there must be an initiator and a responder that can send
and receive data between the two. For more information, see Section 4.
Roles of Sender and Receiver
The sender is the entity that sends data. The receiver is the entity receiving data. In
Compaq FTAM, both the initiator and the responder have sender and receiver
capabilities. For example, an initiator sending a read request is the receiver, and an
initiator sending a write request is the sender.
Service Classes Supported
The service classes supported are defined in terms of combinations of functional units.
At least one common service class must be supported for two implementations to
interoperate. Compaq FTAM supports four service classes: file transfer, file
management, file transfer and management, and file access.
Underlying Services
Compaq FTAM uses Compaq OSI/AS, which is an implementation of version 1 of the
Association Control Service Element (ACSE), as stated in ISO IS 8649 and 8650;
version 1 of the Presentation Layer, as stated in ISO IS 8822 and 8823; and version 2
of the Session Layer, as stated in ISO IS 8326 and 8327. To interoperate with Compaq
FTAM, other FTAM implementations must support compatible versions of ACSE,
Presentation, and Session, as well as the services underlying the Session Layer.
Functional Units
Both implementations must support the functional units required for any services the
pair will perform together. Compaq FTAM supports seven functional units: kernel,
read, write, file access, limited file management, enhanced file management, and
grouping.