USB to Quad RS-232 converter (DB9pin Male) with omplete RS-232 modem control signals use for Internet/Intranet access, Industrial automation, data base access systems, Modem server, PSTN or POS system, PLC monitoring and control etc... For more details on product, Please refer to http://www.papyrus.co.il/usb_to_quad_rs-232_adapter.htm