A program to enable portable personal computers to link to IBM mainframes over telephone lines has been introduced by Digital Communications Associates Inc of Alpharetta, Georgia in collaboration with Hayes Microcomputer Products Inc. The IRMAremote for Hayes Autosync program enables MS-DOS portables equipped with Hayes high speed modems to function as 3270s to the IBM host; it is designed for use with the Smartmodems 2400, 1200 or 1200B, enabling the micro to communicate synchronously without an SDLC board; a V.22 bis or Hayes V-Series Smartmodem 9600 is needed at the host end. The product also enables a printer on the micro to be driven by the host. Up to five host applications can be addressed concurrently. IRMAremote for Hayes AutoSync also offers configurable keyboard capability, fast file transfer, re-direction, and support of DCA Application Program Interface products. It is immediately available from Computer Marketing Plc of Knaphill in Surrey, a 160-strong company founded by its chairman Bruce Coward in 1977, which specialises in IBM equipment. The program is UKP343.