The ship's only radio telephone was on the plane.
He could have briefed her over the radio telephone.
He scrunched to the wall of the snow hole and picked up the radio telephone.
He had a mobile radio telephone in each of his cars at a time when these devices were uncommon and expensive.
'I have several calls to make on the radio telephone.'
You do spend a lot of time on the radio telephone.
The radio telephone is only a partial link since often an officer cannot be located by it.
But not everyone owns a radio telephone, or a way of contacting the shore.
There wouldn't be time and the train's got a radio telephone as well.
You said yourself that all mail trains carry radio telephones now.