通常 つうじょう加入 かにゅう電話 でんわでしょう
tsūjō kanyūdenwadeshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of 通常加入電話

1. Probably will add the phone number.; Likely to include the phone number.

Polite
Presumptive
Conjecture