SMX  (1989)
Strand

Strand Multiplex
A proposed multiplex standard which allowed bi-directional communication and had advantages over AMX192 and the new DMX512 standard, which obviously has become the industry standard. 

Documents

LSI: SMX A New Open Standard (September 1989)
[851kb PDF]
From Lighting & Sound International

Catalogue & Journal Entries for SMX in the Backstage Heritage Collection

SMX A New Protocol for Professional Lighting (1990)

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