通話 つうわ料金 りょうきん せいだったら
tsūwaryōkinseidattara

Noun
Da Copula
no-Adjective

The "-tara" conditional form ("if/when…") of 通話料金制

1. If the call charges were a system…; If call charges were based on a system…; If there was a call charge system…

Tara Conditional
Computing