Goal
This article will help users understand how to answer calls and what happens when there is an incoming call on a Cisco 79XX phone.
Resolution/Steps
When you receive an incoming call the phone will ring, the Message Waiting Indicator will blink red, and the LCD screen will show the incoming number as long as the caller is not calling from a number for which caller id is blocked. The CallTower IP phones allow users to answer received calls in multiple ways:
You may pick up the handset.
To use the speaker function, you may either press the Speaker button or the Answer soft key.
To use a headset, you may press the Headset button; however, some headsets may be configured using the handset port on the back of the phone, in which case the headset button will not be used.

Caller ID:
Outside calls - Caller ID is available if the caller does not have their number blocked.
Internal calls – LCD screen will display the first name and last initial of the caller with their extension.
Incoming Call Indicator:
Phone will ring
Message Waiting Indicator will blink red
LCD screen shows the incoming number
LCD screen indicates which extension the call is coming in from
Common Issues/Related Articles
Factory Reset:
7940 and 7960: Cisco - Phone: 7940 and 7960 Factory Reset Procedure
7942 and 7962: Cisco - Phone: 7942 and 7962 Factory Reset Procedure
7945, 7965, and 7975: Cisco - Phone: 7945, 7965, 7975 Factory Reset Procedure
79XX Features:
