Lexmark C910 User Reference Manual page 254

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* Printer sets the Transmit Delay value during a power-on reset to maximize link
performance (recommended).
None No delay is imposed by the printer. However, not all host computers can communicate
without some transmission delays.
1...15 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.
Window Size
Purpose:
To specify the maximum number of infrared frames the printer can receive before sending an
acknowledgment to the host computer.
Values:
Auto* Printer sets the Window Size value during a power-on reset to maximize link performance
(recommended).
1 User sets the Window Size to one frame (1). If you have trouble printing using the infrared
port, changing the Window Size menu item to 1 may resolve the problem.
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