复电

wǒ yǐ gěi jiā lǐ fù diàn

我已给家里复电。

I've already telegraphed my family in reply.

wǒ yǐ fù diàn

我已复电。

I've already sent a telegram as reply.

fù diàn yǐ fā

复电已发。

A telegram has been sent in reply to the one received.