11.   For example, the speech we hear over a telephone line is perfectly understandable.

12.   I tried to ring the emergency telephone lines all day yesterday from a public phone box, but could never get through.

13.   It will travel via cable lines and telephone lines, through the air, and directly to and from satellites.

14.   My successor spent several months on the intercontinental telephone lines trying to locate the debtors.

15.   Reporting from the area was difficult even before terrorists put all the telephone lines out of action.

16.   Standard serial communication over telephone lines is sufficient for remote capabilities.

17.   Suppose we wish to send binary data along a telephone line.

18.   The assailants had also cut her telephone lines.

19.   The earthquake destroyed homes, telephone lines and roads.

20.   The emergency telephone lines operate around the clock.