My understanding is that the "network" was a manually-staffed telex operations room:
https://www.researchgate.net/publication/290742382_Cyberneti...
>Serendipitously, we found a large number of spare telex machines in one of the state-owned enterprises. Their installation followed in plants and enterprises throughout the country, as well as in industrial committees, CORFO and other government offices. A telex room with tens of machines was installed at CORFO. In practice, it was an operations room for the state-owned industry that offered an incipient nervous system for the industrial economy; it was called Cybernet
The telex itself was not invented in Chile, but rather ironically in 1930s Germany: