TR3271 Management Programming Manual

SECTION 4
SPI PROGRAMMING CONSIDERATIONS FOR TR3271
The Communications Management Programming Manual discusses gen-
eral programming considerations for writing applications that
use the Subsystem Programmatic Interface (SPI) to communicate
with data-communications subsystems like the TR3271 subsystem.
This section discusses SPI programming considerations that are
specific to the TR3271 subsystem.
BUILDING THE COMMAND BUFFER
The following programming considerations apply when an applica-
tion builds the command buffer for an TR3271 command.
The recommended buffer length in bytes for a command is a
predefined value with the symbolic name ZCOM-VAL-MAXBUFLEN.
The subsystem does not support multiple commands in a single
request message. However, some of the commands can contain the
subordinate-modifier token, so one command can affect multiple
objects.
The subsystem does not support continuation of a command across
multiple messages, but it does support the special case of
receiving multiple reply messages using the context token, as
described in the Distributed Systems Management (DSM) Programming
Manual .
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