Lineman's handset

[1] A typical lineman's handset integrates an earpiece, a mouthpiece, a dialing interface, and a set of test leads for connecting to the telephone circuit.

Originally, lineman's handsets featured a rotary dial, but modern sets use some variant of the standard 12-button DTMF keypad and also employ an amplifier for speaker use.

Adapters designed to fit other punch block types, heat coil sockets, or modular jacks may also be used.

For outside plant work, this would include any serving area interface, such as a cross-connect box or aerial splice enclosure.

Common tests include checking for dial tone, using ANAC to identify the line, and using a ringback number.