Format of CAS file transfer record:
Offset	Size	Description	)
 00h	BYTE	file type (ignored unless FAX)
		00h ASCII
		01h PCX
		02h DCX
		03h to 7Fh reserved
 01h	BYTE	text size for ASCII FAX file
		00h = 80 columns by 66 lines (11 inches)
		01h = 132 columns by 88 lines (11 inches)
		02h to 7Fh reserved
 02h	BYTE	status of file
		00h untouched
		01h opened
		02h moved
		03h deleted
		04h not yet received
		05h to 7Fh reserved
 03h	DWORD	bytes already transmitted
 07h	DWORD	file size in bytes
 0Bh	WORD	pages alread transmitted
 0Dh	WORD	number of pages in file
 0Fh 80 BYTEs	ASCIZ filename
 5Fh	BYTE	1/8 inch page length
		if page length below set to 01h through 7Fh, this value
		  specifies additional 1/8 inch increments to page length
 60h	BYTE	page length
		00h = 11 inches
		01h to 7Fh = page length is this number of inches plus value of
			  1/8 inch field above
		80h to FEh reserved
		FFh = ASCII pages ending with formfeed
 61h 31 BYTEs	reserved (zeros)