Spanish to English Tech/Engineering Telecom(munications) Tesys

Hello,

I wonder if somebody could help me with this term.
It crops up in a text about TESYS, a data-sharing network, pioneered in Spain in the 1970s.

"Un Tesys5 no es más que un montón de Tesys1 unidos mediante UNA VÍA COMÚN, y esa VÍA COMÚN, controlada por una unidad de control."

What would be the equivalent in English?
Common path/route, joint path/route? I've no idea!

I'd be grateful for any feedback.

Thanks.

Desmond