<P> Group 1 and 2 faxes are sent in the same manner as a frame of analog television, with each scanned line transmitted as a continuous analog signal . Horizontal resolution depended upon the quality of the scanner, transmission line, and the printer . Analog fax machines are obsolete and no longer manufactured . ITU - T Recommendations T. 2 and T. 3 were withdrawn as obsolete in July 1996 . </P> <Ul> <Li> Group 1 faxes conform to the ITU - T Recommendation T. 2 . Group 1 faxes take six minutes to transmit a single page, with a vertical resolution of 96 scan lines per inch . Group 1 fax machines are obsolete and no longer manufactured . </Li> <Li> Group 2 faxes conform to the ITU - T Recommendations T. 30 and T. 3 . Group 2 faxes take three minutes to transmit a single page, with a vertical resolution of 96 scan lines per inch . Group 2 fax machines are almost obsolete, and are no longer manufactured . Group 2 fax machines can interoperate with Group 3 fax machines . </Li> </Ul> <Li> Group 1 faxes conform to the ITU - T Recommendation T. 2 . Group 1 faxes take six minutes to transmit a single page, with a vertical resolution of 96 scan lines per inch . Group 1 fax machines are obsolete and no longer manufactured . </Li> <Li> Group 2 faxes conform to the ITU - T Recommendations T. 30 and T. 3 . Group 2 faxes take three minutes to transmit a single page, with a vertical resolution of 96 scan lines per inch . Group 2 fax machines are almost obsolete, and are no longer manufactured . Group 2 fax machines can interoperate with Group 3 fax machines . </Li>

Who invented the fax machine and in what year