Modification of the Group 4 Facsimile Validation System
Abstract
Developed under a previous contract was a software system to validate Group 4 Facsimile Equipment when operating over a public switched telephone network (PSTN) or a packet switched data network (PSDN). The validation system was developed based on the then currently existing CCITT S Series Recommendations. Subsequent to the development of the validation system the CCITT S Series Recommendations pertaining to the Telematic Services were updated and renamed as T Series Recommendations. The purpose of this task was to update the Group 4 Validation System in accordance with the latest CCITT recommendations pertaining to Group 4 Facsimile Equipment. In the following three sections a system overview, the system modifications required and Validation system testing are presented. Section 2.0 reviews the overall Validation system requirements and the system structure used to meet these requirements. Section 3.0 details the system modifications necessary to conform to the T Series Recommendations and the layers within the Open Systems Interconnection (OSI) that were effected. Section 4.0 discusses Group 4 Validation System testing and any operational features changed by the implemented changes.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1987
- Accession Number
- ADA197712
Entities
Organizations
- Delta Information Systems (United States)