Lexmark W820 User's Guide - Page 261

PS SmartSwitch Purpose: To configure the printer so it automatically switches to PostScript emulation when a print job received through the infrared port requires it, regardless of the default printer language. Values: On* Off Printer examines data on the infrared interface and selects PostScript emulation if the data indicates that is the required printer language. Printer does not examine the incoming data. The printer uses PCL emulation to process the job if PCL SmartSwitch is On, or uses the default printer language specified in the Setup Menu if PCL SmartSwitch is Off. See also: PCL SmartSwitch; Printer Language Transmit Delay Purpose: To define the amount of time, in seconds, the printer must wait before transmitting meaningful infrared data to the host computer, as well as the amount of time the printer requests that the host computer wait before transmitting infrared data. Values: Auto* None 1...15 Printer sets the Transmit Delay value during a power-on reset to maximize link performance (recommended). No delay is imposed by the printer. However, not all host computers can communicate without some transmission delays. User selects a Transmit Delay value between 1 and 15 seconds. If you have trouble printing using the infrared port, selecting a high Transmit Delay value, such as 15, may resolve the problem. 259