自動 じどう しき構内 こうない交換 こうかん だったら
jidō shi kikōnaikōkankidattara

Noun
Da Copula

The "-tara" conditional form ("if/when…") of 自動式構内交換機

1. If it were an automatic private branch exchange.; If it's an automatic private branch exchange.

Tara Conditional
Computing