User`s guide

5: BSC 2780/3780 DLI Functions
DC 900-1340I 107
binary configuration files. Refer to Chapter 7 of this document, as well as the Freeway
Data Link Interface Reference Guide and the Freeway Transport Subsystem Interface Ref-
erence Guide.
ICP link configuration can be performed using any of the following methods:
• The dlOpen function can configure the ICP links during the DLI session establish-
ment process using the default ICP link configuration values provided by the pro-
tocol software.
• You can specify ICP link parameters in the DLI ASCII configuration file and then
run the
dlicfg preprocessor program (see Chapter 7). The dlOpen function uses the
resulting DLI binary configuration file to perform the link configuration during
the DLI session establishment process.
• You can perform ICP link configuration within the client application (described
in Section 5.4.1.4). This method is useful if you need to change link configuration
without exiting the application.
5.1.2 Normal versus Raw Operation
There are two choices for the protocol DLI configuration parameter:
• A session is opened for Normal operation if you set protocol to a specific protocol
(for example,
“BSC3780”); then the DLI software configures the ICP links using
the values in the DLI configuration file and transparently handles all headers and
I/O.
• A session is opened for Raw operation if you set protocol to “raw”; then your appli-
cation must handle all configuration, headers, and I/O details. Raw operation is
recommended for data transfer where responses might be received out of
sequence (especially in BSC 3270). Refer to the Freeway Data Link Interface Refer-
ence Guide if you need to use Raw operation.