# CICS TD Queue

Substation CICS Interface reads outbound events and, when requested, writes inbound data with TDQs.

Note: Ensure that you have defined the TDQ names before starting Substation ES.

You can define a TDQ in CICS as a remote queue for multiple CICS server regions. The CICS TDQ must be a logically recoverable intrapartition TDQ that is recoverable on warm and emergency restarts.

For more information about TDQs, see CICS System Definition Guide.

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