The form of connectors depends on the particular serial port used. Get best price for DB9 Pin Male To Female Serial CableĪ serial cable is a cable used to transfer information between two devices using a serial communication protocol. Other serial communications standards are better adapted to drive hundreds or thousands of metres of cable. Empirically tested combinations of bit rate, serial ports, cable type, and lengths may provide reliable communications, but generally RS-232-compatible ports are intended to be connected by at the most a few tens of metres of cable. This does not correspond to a fixed length of cable since varying cables have different characteristics. The RS-232 standard states that a compliant port must provide defined signal characteristics for a capacitive load of 2500 pF. The maximum working length of a cable varies depending on the characteristics of the transmitters and receivers, the baud rate on the cable, and the capacitance and electrical impedance of the cable. A cable wired for connecting two DTEs directly is known as a null modem cable. A serial cable is a cable used to transfer information between two devices using a serial communication protocol.
