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Features of the Active USB-COM Port Driver
1. Features:
- The USB device can be removed from the PC USB Port while the application opens the Serial Port with which the USB device is connected. (It will be kept opening when the USB device is plugged into the USB Port again.)
- The communication unit (CU-221/CU-421) can be removed from the PC USB Port while connecting with PC by both serial IrDA protocol driver and Microsoft Active Sync. (It will be able to be re-connected when the CU is plugged into the USB Port again.)
- The Virtual Serial Port is always existed on PC even if USB device is removed from the PC USB Port, so that the Serial Port can be opened anytime.
- On the Device Manager, the COM port is confirmed which port the USB device is connected with.
2. Differences:
The below table shows the functional differences between the Active USB-COM and USB-COM 1.x.
| Function | Active USB-COM | USB-COM Ver.1.x |
|---|---|---|
| Need for the operation of "safely remove the USB device" when the USB device is removed | No need | Need |
| Serial Port Number release when the USB device is removed | Non-release | Release |
| Plugging the USB device into/off, during communication (COM Port is opened) |
Possible | Impossible |
| Fixed COM Port Number for the specified USB Port | Impossible | Possible:2000,XP(32bit) Impossible:98SE,Me |
| Supported Windows® Version | 2000, XP(32bit) | 98SE, Me, 2000, XP(32bit) |
3. Notice:
- The USB device can be removed and plugged into PC during communication (COM port is opened). However, communication data are lost while the USB device is removed.
- COM Port Number is always occupied because this driver is operated as a Virtual Serial Port, even while the USB device is removed.
- The Active USB-COM Port Driver can not fix COM Port Number for the specified USB Port. Plugged USB Device is assigned to the lowest COM Port Number which is produced by the Active USB-COM Port Driver. Furthermore, when PC (re-)booting, COM Port Number is also assinged to the USB Port which is recognized order by Windows. Please confirm the pair relation between USB Device and COM Port Number after PC (re-)booting.
- The Active USB-COM Port Driver and the USB-COM Port Driver 1.x can not be used at the same time. The installer of this driver requires to uninstall the USB-COM Port Driver 1.x.
- The multiple use of the USB device is available when this driver is installed at the multiple times. However, this driver can not be individually uninstalled, so that all the installed drivers must be uninstalled at one time.
- The release of the Active USB-COM Port Driver does not mean that the current USB-COM Port Drive 1.x should be replaced with the Active USB-COM Port Driver. It is suggested that the functional differences should be well-understood and considered which driver is appropriate for your purpose.
