Lexmark 249X, 248X manual Universal Serial Bus Interface, Serial Interface Option

Universal Serial Bus Interface

The USB interface, with a signaling bit rate of 12 Mb/s (full speed), is in full compliance with the Universal Serial Bus Specification Revision 1.0. It has a USB Function Controller with two FIFO-based Endpoints:

•One bidirectional Control Endpoint 0 (8 bytes)

•One receive Endpoint 1 (1*64 bytes)

Serial Interface

You may want to use the serial interface when you need to use a cable more than 6 m (20 ft.) in length, share the printer using a printer sharing device, if you need to connect the printer to a computer that does not have a parallel port, or to a computer that does not have an available parallel port.

Use the RS-232C protocol if the printer is more than 6 m (20 ft.) from the computer.

Serial Interface Option

The Lexmark serial interface, part number 12T0154, supports the RS-232C protocol. All serial interface parameters can be selected by the operator panel. The serial interface installs internally into the back of the printer, and connects to the serial cable, part number 1038693.

How to Connect the RS-232C Serial Interface

To connect the serial interface, use the following cable:

•Lexmark Part Number 1038693 (15.24 m or 50 ft.)

96 Section 6: Using the Printer Interface