Chasing Interoperability

This is off-topic but, I think, of interest to our kind (geeks).

Quoteth:

The conference had taken place in Berlin, and the nations in attendance agreed in principle that every station or ship should be able to communicate with every other, regardless of whose company manufactured the equipment. They agreed also that companies must exchange the technical specs necessary to make such communication possible.

What year was this conference? It was circa 1903 and pertained to wireless communication. From the outstanding popular history book, Thunderstruck, one part Marconi bio and one part murder mystery.