Structured Fax File

Structured Fax File format (SFF) is a bi-level raster image format used by ISDN devices that support CAPI (Common ISDN Application Programming Interface). An SFF file contains one or more images in CCITT Group 3 format.

Identification
SFF files begin with a signature: The ASCII string " ".

Specifications

 * Structured Fax File Format Description

Software

 * SFF Tools
 * XnView
 * IrfanView (with SFF PlugIn)

Sample files

 * testfax.sff

Links

 * Wikipedia article