Lexmark Printer manual Input Buffer Sizes in Bytes, Fax

8-43

Interfaces

Note: Network capabilities are standard on some printer models. Refer to your printer user documentation for more information.

Input Buffer

Your printer has an input (link) buffer for each interface. The maximum size of the input buffer depends upon the amount of RAM memory installed. The input buffers serve the same purpose as a print spooler and can be allocated automatically by the printer. The size of the input buffer may be modified or disabled from the operator panel menus or through MarkVision Professional.

If NPAP is active on a port, two-thirds of the buffer memory is reserved for NPAP and one-third is set aside for the input buffer. If NPAP is not active, all the memory is available for the input buffer.

Table 8-8shows the sizes automatically selected for the buffers when the buffer size is set to Auto in the menus.

Table 8-8: Input Buffer Sizes in Bytes

		Serial	Network
Memory Size	Parallel Buffer Size	Buffer Size	Buffer Size	LocalTalk	USB	Fax
2MB	12K	12K	12K	12K	12K	N/A
4MB	12K	12K	48K	12K	12K	350K
6MB	24K	12K	48K	24K	12K	350K
8, 10, or 12MB	48K	24K	48K	48K	24K	350K
16, 18, or 20MB	48K (1MB if no optional adapter is installed)	24K	1MB	1MB	24K	1MB
24, 28, 32, or 34MB	192K (1MB if no optional adapter is installed)	150K	1MB	1MB	150K	1MB
36, 38, or 40MB	384K (1MB if no optional adapter is installed)	300K	1MB	1MB	300K	1MB
44MB or larger	2MB	300K	2MB	2MB	300K	1MB

Note: MB represents 1,048,576 bytes. K represents 1024 bytes.

N/A means non-applicable.

Note: When using serial communication, the printer signals the host computer to stop transmitting bytes when the serial input buffer is within 640 bytes. In addition, when XON/XOFF protocol is used, the printer signals the host computer to stop transmitting when the serial input buffer is 384, 256, and 128 bytes from full.