A Projection of the Characteristics of Group 4 Facsimile Equipment.
DELTA INFORMATION SYSTEMS INC JENKINTOWN PA
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The International Telegraph and Telephone Consultative Committee CCITT has defined a new category or group of facsimile systems--Group 4. According to the CCITT definition, Group 4 facsimile apparatus incorporates means for reducing the redundant information in the document signal prior to transmission, mainly via Public Data Networks PDN. The apparatus will utilize procedures applicable to the PDN and will assure error-free reception of the document. The apparatus may also be used on the public telephone network where an appropriate modulation process will be utilized. The process of standardization for Group 4 is in its very early formative stages. The purpose of this study is to anticipate and support this standardization effort to insure that future facsimile systems will be available to the U.S. Government having a high level of reliability, interoperability, and overall performance. Specifically, the purpose of the study is to identify those facsimile parameters requiring standardization, and the analysis of these parameters to determine likely trends and options. Author
- Non-Radio Communications