I dialed her number but got a busy signal.

我给她拨了电话，但占线。

I don't know I just keep getting a busy signal.

我不知道，对方电话老是占线。

Busy signal detected at remote site on callback.

在远程站点回拨时检测到了占线信号。

I don't know, I just keep getting a busy signal.

我不知道，对方电话老是占线。

Every time I call the number, I get a busy signal.

我每次拨打这个号码，电话总是忙音。