Not all fax machines, however, can accept unlimited length documents. Worse, the remote machine's page- length capability is not known until the fax connection has been established. The solution is for the transmitting fax device to image long documents into A4-size strips, then seam them together at transmission, after the capabilities of the remote fax machine is known. Therefore, a wide majority of facsimile applications choose this natural order for storage. Nevertheless, TIFF Class F readers must be able to read data in both bit orders.
Facsimile hardware provides page quality information, but reports no bad lines.
Facsimile hardware provides page quality information, and reports bad lines. Write both BadFaxLines and ConsecutiveBadFaxLines. Import A Class F reader must be able to handle a Class F file containing multiple pages. Due to the disruptive effect to application software of line-length errors and because such errors are likely in everyday facsimile transmissions, uncompressed data is not allowed. Since two-dimensional encoding is not required for Group 3 compatibility, Class F readers may decline to read such files.