> 8.5 | Special Environments

> The driver expects a module connected to the COM port in a way where the ignition signal to start the module is connected with the DTR signal of the COM port so that the driver is able to switch the module on via the DTR signal. If the driver is used for modules built into environments where this connection does not exist (e.g. like laptops with a hard mounted module) it cannot power on the module. In this case the automatic power down of the module after closing the last virtual channel has to be disabled by replacing the line
> HKR,,ClosePort,0x00010000,"AT+IPR=0","AT^SMSO"
> with the line
> HKR,,ClosePort,0x00010000,"AT+IPR=0"
> In the case of TC45 and XC18, there is no need to alter the value “ClosePort” in the Registry.