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1985 · annex to the cooperation agreement

Franco-German Experimental Program — Annex A

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Before GSM settled on a radio system, rival approaches had to be built and tested. This annex sets out four Franco-German experimental projects, naming the manufacturers and consortia responsible for them. Wideband TDMA appears beside narrowband TDMA, a mixed transmission approach and slow frequency hopping. The page captures a moment when the eventual standard was still a choice among competing industrial proposals. It also shows why selecting a technology could never be a purely abstract exercise: contracts, companies and national research programmes already stood behind the alternatives. This is the experimental programme attached to the 1985 cooperation agreement, not a description written after GSM’s success.

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