z/OS Communications Server: SNA Programming
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Send a Set and Test Sequence Number request to the SLU

z/OS Communications Server: SNA Programming
SC27-3674-00

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CONTROL=STSN,STYPE=REQ

When the SESSIONC macroinstruction is issued, the settings of the IBSQAC and OBSQAC fields determine what happens to the associated sequence numbers.

Setting of IBSQAC or OBSQAC field on request Action on associated sequence number at application program
SET  Set the sequence number for the session specified value and send it to the logical unit.
TESTSET  Set the sequence number for the session to the specified value, send it to the logical unit, and obtain a sequence number from the logical unit for the session.
INVALID  Do not change the current sequence number. Obtain the sequence number from the logical unit for the session.
IGNORE  Do not change the current sequence number.
Parent topic: Send a Start Data-Traffic request to the SLU

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