Avaya 1220 User Guide

Your office communication system.

A button on which the handset presses down, disconnecting your 

call when you replace the handset. The handset (when lifted) 

releases the switchhook, and you either answer a call or you 

receive a dial tone to make a call.

Screen displays that interact with the end user as a result of an 

action or event.

An LCD or an LED that flashes to indicate that a message is 

waiting or when the ringer is on.

Voice over Internet Protocol.  This is a telephone technology 

where voice and control signals are transmitted over an IP, or 

Internet Protocol, packet-switched network.  This makes more 

efficient use of network resources and allows more sophisticated 

features than traditional telephone technology, where audio is 

transmitted over a circuit-switched network.