高度 こうど通信 つうしんシステム相互 そうご接続 せつぞくだったら
kōdotsūshinshisutemu sō gosetsuzokudattara

Noun
Da Copula

The "-tara" conditional form ("if/when…") of 高度通信システム相互接続

1. If it were a highly advanced communication system interconnection.; If the highly advanced communication system interconnection existed.

Tara Conditional
Computing