HylaFAX Glossary
- Class 1
- Class 1 fax modems are modems with extensions to their command sets that allow them to act as Group 3 fax machines. Class 1 fax modems leave almost all of the processing to the software. The official standard for Class 1 fax modems is EIA/TIA-578.
- Class 1.0
- Extension of Class 1.0 that adds V.34 (SuperG3) high-speed fax capability.
- Class 2
- Class 2 fax modems handle much of the processing previously done by the CPU. It took a very long time for Class 2 to be approved, however, so many fax modems were produced before the standard was official. Thus, Class 2.0 is used for fax modems which apply strictly to the standards, while Class 2 applies to those fax modems that were produced before the standard was official.
- Class 2.1
- Extension of Class 2.0 that adds V.34 (SuperG3) high-speed fax capability.
