。
She called from Tokyo.
Literal
She [topic-は] Tokyo [from-から] phone [object-を] did-toward-here.
~てきた is the directional ~てくる marking action that comes toward the speaker — she initiated the call from Tokyo, and it arrived here. Without ~てきた, 電話をした would just mean 'she made a phone call' without specifying direction. This directional use of ~てくる is one of its core functions and is worth distinguishing from the temporal 'has been doing' sense.