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April 9, 1987

ADVANCED MICRO DEVICES PREVIEWS ISDN PROTOCOL CONTROLLER

By CBR Staff Writer

Advanced Micro Devices Inc is looking for big business from the emerging Integrated Services Digital Network interface circuits market, and this week previewed what it believes will become a key part for interfacing clusters of terminal equipment to digital PABXs. Designed to implement the standards contained in AT&T’s Digital Multiplex Interface definition for simultaneous connection of multiple terminals via a twisted pair cable through a PABX to a host, the Am79C401 also supports HDLC, SDLC, X25 LAPB and LAPD protocols. With AMD’s other ISDN parts, it implements both ends of the S interface that links terminals to digital PABXs. To be fabricated in 1.2 micron nominal geometry CMOS, the Am79C401 will be jointly tested and certified with AT&T and samples are due at year-end.

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