FacsimileߞA review

The development and potential of facsimile as an alternative means of communication over voicegrade telephone lines is discussed. The components of typical facsimile systems are described, and the characteristics of telephone channels in so far as they influence the performance of facsimile machines are covered, together with the problems confronting manufacturers. These include standardization, compatibility, and compliance with the requirements of national safety and telecommunications authorities. Future trends in the facsimile field are forecast.