Honeywell DOLPHIN 9951 - Manual (Page 90)

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9900/9950/9951 COM Port Assignment Table
COM Port Description
COM0 Unused
COM1 Serial Port: RS-232 Connector on the bottom panel
COM2 Not accessible
COM3 IrDA: Serial Infrared (SIR) up to 115 Kbps
COM4 Not accessible
COM5 Bluetooth DUN
COM6 IrCOMM
COM7 GPS: COM Port for the GPS receiver
COM8 USB Serial: Virtual USB Serial port for ActiveSync
COM9 Bluetooth BTHATCI server