Canon FAX-L260i Service Manual page 89

e) Layer 6
Message
P-START
Added to the front of the image data (page) as that page's attribute (paper, size,
resolution) parameter.
P-END
Added to the end of the image data (page) for P-START.
PIX The image data header, or the image data (MMR).
The message names (P-START, P-END, and PIX) are terms only used within Canon.
Please note that recommendations for these message names are not being considered.
NOTE
FAX-L260i Chapter 2: Technical Reference
Description
2-31