You can use a USB cable or serial cable to connect your device to your PC. Always use the cable or cradle provided by your device's manufacturer to connect your device to your desktop computer.
Important Note For additional security, disable network bridging on the PC (specifically, bridging to a Remote NDIS adapter) before connecting to the PC to pass though to the Internet or a network. For more information on network bridging, see Windows Help on the PC.
Note If you are using a serial cable, the COM port you used during installation of ActiveSync must be available (not in use) for ActiveSync to connect to your device. If you have freed the COM port for other uses, on the File menu, click Connection Settings, then click Connect. ActiveSync will free the COM port and connect to your device.
See also
Connect to a network or the Internet through ActiveSync
Connect to ActiveSync using Bluetooth
Connect to ActiveSync using infrared
Overview of synchronization relationships