OSI/AS Programming Manual

APS_ASSOC_CONNECTRSP_
APS Procedure Calls
3–42 056783 Tandem Computers Incorporated
manager process looks up an application name, it checks in the MIB to retrieve the
PSAP address and the application entity title if it is present.
The maximum amount of user data you can send with this primitive depends on
the layer of your connection, whether you are using session version 1 or session
version 2, and (for presentation and ACSE connections) whether your connection
is in normal mode or X.410-1984 mode. The maximum length of the user-data
parameter is as follows:
Session version 1 Session version 2
Session connection 512 bytes 10240 bytes
Presentation connection (normal mode) < 512 bytes < 10240 bytes
ACSE connection (normal mode) <512 bytes < 10240 bytes
For a normal-mode presentation or ACSE connection, you can send as much data
as will fit in a 512-byte PPDU (for session version 1) or a 10240-byte PPDU (for
session version 2); the maximum length depends on the encoding.
For a presentation or ACSE connection in X.410-1984 mode, the maximum amount
of data is the same as that for a session connection.
In X.410-1984 mode, all parameters (other than mode ) specific to presentation and
ACSE connections are ignored, and no encoding or decoding of user data is
performed.
For an ACSE connection, if the remote application specifies a presentation default
context name, it is never used, because OSI/AS always supplies a presentation
context. Nevertheless, you must still accept or reject it by setting the value of
connect-result and, if you are rejecting the connection, the value of
pres-default-context-result .
session-rqmnts is a structure containing session functional units, a
synchronization point value, and token values.
When you select functional units, follow these guidelines:
Note that only the optional functional units are included in the structure.
Because the kernel functional unit is always available, it is selected
automatically.
Only one presentation functional unit (the presentation kernel) is supported;
no optional presentation functional units are supported. Therefore, no
corresponding parameter is provided for the Presentation Layer.
Set the ZL5-FU-ISPRESENT field to ZAPS-VAL-PRESENT to indicate that the
functional units are set.
You can select functional units that the remote application did not select.
However, only functional units selected by both sides are used on the
connection. You must determine which functional units are available for use.
To do this, compare your input with the input from the remote application.