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FM Profile 18

Function management (FM) Profile 18 is supported on primary logical unit-secondary logical unit (PLU-SLU) sessions using LU 0. This profile uses the following session rules:

  • PLU and SLU use immediate response mode.

  • PLU and SLU support the following data flow control (DFC) commands (an asterisk [*] indicates commands permitted by the FM profile that are never sent by Host Integration Server):

    • CANCEL

    • SIGNAL

    • LUSTAT

    • BIS and SBI (allowed only if brackets are used)

    • CHASE*

    • BID and RTR (allowed only if brackets are used)

  • Length-checked compression is allowed.

    The following FM Usage fields define the options for Profile 18:

  • Chaining use (PLU and SLU)

  • Request control mode selection (PLU and SLU)

  • Chain response protocol (PLU and SLU)

  • FMH-1 SCB Compression indicator (PLU and SLU)

  • Send EB indicator (PLU and SLU)

  • FM header usage

  • Brackets usage and reset state

  • Bracket termination rule

  • Alternate Code Set Allowed indicator

  • Normal-flow send/receive mode

  • Recovery responsibility

  • Contention winner/loser

  • Half-duplex flip-flop reset states

See Also

Transmission Service and Function Management Profiles