Convert your existing serial cables into null modem cables with the help of Cables To Go s Null Modem Adapters. A quick and easy fix for your DTE or DCE incompatibilities connecting two RS-232 serial ports has never been so easy. Each cable will effectively cross the data transmission lines. With their molded design providing a solid connection each adapter is shielded against outside EMI/RFI interference while giving you the flexibility to meet your connectivity needs. Connectors: DB9 male to DB9 female. Fully shielded against outside EMI/RFI interference. Crosses the data transmission lines in straight-through serial cables. Economical solution for connecting serial ports on notebooks.