MIHTMOUT start option

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   .-MIHTMOUT--=--1800----------.   
>>-+----------------------------+------------------------------><
   '-MIHTMOUT--=--units_of_time-'   

Specifies the time (in tenths of a second) that allows you to adjust the missing interrupt handling interval during channel-to-channel communication between two VTAMs or between VTAM® and an IBM® 3172 Interconnect Controller.

Note: This start option does not apply to attachments between two hosts that use the multipath channel (MPC) feature. See Multipath channel support and in the z/OS Communications Server: SNA Network Implementation Guide for information on MPC.

You can change the value of MIHTMOUT with the MODIFY VTAMOPTS command while VTAM is running.