着ちゃくもじ

noun

call arrival indicator on a busy mobile phone (DoCoMo)

Historical DoCoMo feature; a text message or symbol shown when a call comes in while the line is busy. Now largely obsolete with modern smartphones.

• 昔むかしの携けい帯たいでは、通つう話わ中ちゅうに着ちゃくもじが表ひょう示じされた。

  On old mobile phones, a call arrival indicator was displayed during a call.