telephone是可數名詞嗎

例句：

The new system interfaces with existing telephone equipment.

新系統與現有的`電話設備相連接。

You can telephone your order 24 hours a day.

一天24小時你都可以打電話訂購。

That telephone call set in train a whole series of events.

那個電話把一整套事項安排好了。

I need to make a telephone call.

我得打個電話。

Our telephone lines are open during normal office hours.

我們的電話在正常辦公時間一直開通。