Command to set the modem's call fail timer.
Use a single command string. For example,
HKR, Settings, CallSetupFailTimer,, "S7=<#>"
If the modem does not have this feature, set the value to 0 in the Properties registry setting. Do not set this command to S7=<0>.
InactivityTimeout and CallSetupFailTimer should have "<#>", not a hardcoded value. The # is a placeholder. The actual number that will be sent to the modem is based on the CallSetupFailTimeout member of the Properties registry setting, and will be filled in by Unimodem.
See also CallSetupFailTimeout in the Properties registry setting documentation.