Application-supplied information for switched connections

A VTAM® application program can supply dial number digits and other dial-out switched connection information during session initiation. This application-supplied information, which you provide in the ASDP control block, temporarily overrides the information defined for the contacted device in a switched major node.

Guideline: This function also authorizes the application to override XID checking for the contacted device. This can cause a security exposure.

This function can be used with a type 1 or 2 physical unit or a type 2.1 node.

Figure 1. Application-supplied operands for switched connections. Host A02 is a subarea node (SA).

A diagram that shows an example of application-supplied operands for switched connections through an NCP.

For more information about this function, see the z/OS Communications Server: SNA Network Implementation Guide.

For a sample switched major node that authorizes a physical unit to accept application-supplied dial-out information, see Application-supplied operands for switched connections.

For more information about the ASDP control block, see z/OS Communications Server: SNA Programming.

An application is authorized to supply dial-out information by using the ASDP option on the AUTH operand on the APPL definition statement in an application program major node. Here, application APPLX2 is authorized to supply dial-out information (AUTH=ASDP).

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*   A02APPLS - VTAM APPLICATION PROGRAM MAJOR NODE - SUBAREA A02     *
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         VBUILD TYPE=APPL
APPLX2   APPL  AUTH=(ACQ,PASS,ASDP),  X
               MODETAB=AMODETAB,                                       X
               PARSESS=YES
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