Home » Knowledge Base » Spec sheet – COM port assignmentSpec sheet – COM port assignment COM1: Algiz 8X RS232 Expansion (item: A8XEXP-RS232) COM3: u-blox GPS COM11: RS232 from ALGIZ 8X Lockable Vehicle Dock (item: ALG8X-05A) COM15: ALGIZ 8X Barcode Imager Expansion (item: A8XEXP-BC)