A system allows a connecting a mobile device with a barcode scanner to a stationary device by scanning a barcode displayed on a display of the stationary device. The system allows connecting only one mobile device to the stationary device at any given time and allows connecting the mobile device to only one stationary device at any given time. Once connected to the stationary device, the mobile device may be used to scan additional printed barcodes and barcodes displayed by the stationary device or elsewhere, sending data corresponding to the scanned barcodes to the stationary device as if the data were entered by an input device of the stationary device. The barcode scanning functionality may also allow other ways of controlling the mobile device, including performing speed dialing, call transfer, or other telephone functionality based on barcode scanning Encryption and other similar techniques may be employed for additional security.