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Conformance and Interoperatility
OSI/FTAM Responder Manual—425199-001
2-7
Presentation Encoding of FTAM PDUs and Data
When receiving PDUs, Compaq FTAM supports all three options listed above. When
sending PDUs, Compaq FTAM follows these rules:
•
If single FTAM PDUs are to be sent, they are placed in a single PDV list encoded as
single-ASN1-type.
•
If multiple FTAM PDUs are to be sent (grouped requests or responses), they are sent
in a single PDV list encoded as single-ASN1-type.
•
When F-DATA requests are sent by the Compaq responder, the method of encoding
depends on the number of data elements to be encoded. If only a single data
element is to be sent, it is placed in a single PDV list encoded as single-ASN1-type.
If more than one data element is to be sent, the data elements are placed in a single
PDV list, encoded as octet-aligned.
For FTAM-2 files, node-descriptor data elements are placed in their own PDV lists as
single-ASN1-type. Consecutive file-contents data elements are placed in a single PDV
list as either single-ASN1-type or octet-aligned, depending on whether one or more
consecutive data elements exist.