Dog and Bone Is Rhyming Slang for This Device

Word Meaning:

TELEPHONE — (countable, telephony) A telecommunication device which converts data or sounds (usually speech) into electrical signals which are then transmitted to enable two or more people to communicate with each other over a distance; now usually a device having a dial or keypad with numerals for entering a number, etc., to connect with a person, and means (such as a sound or vibration) for alerting one to an incoming call or transmission; also, the handset or receiver of such a device.

Definitions from Wiktionary.