You may also find 50'. The coiled cord between the base of a phone and the handset is usually called a handset cord. The little plastic tips on the ends of cords and cables are plugs. Plugs fit into jacks. Despite their male name, jacks are female.
Plugs are male.
If you don't understand this, the next time you're naked, look in the mirror. Modular plugs are made in three standard sizes. The middle-size plug is the most common. It has six positions, and either two, four, or six wires. It is used for most line cords, for connecting phones, modems and other devices to phone jacks.