Cisco 7821 Reference Guide

Adjusting the Handset, Speakerphone, and Headset Volume
To adjust volume:
 To increase of decrease the volume, press the up or down (+/-) volume button.
 Volume will save automatic.
Line Appearances
Line appearances are the extensions displayed on the phones. Some line appearances will be extension
numbers, while some may be extension names.
 Direct lines will be displayed on the phones with descriptions providing the end user name and
extension numbers.
 If configured, Group lines or Shared lines will be displayed on the phones with descriptions and
extension numbers.
Placing a Call

Cisco 7821 Specifications

General

Resolution	396 x 162 pixels
Lines	2
Speakerphone	Yes
Display	3.5-inch (89 mm) monochrome display
Ethernet Ports	2 x 10/100 Ethernet ports
Power	IEEE PoE Class 1
Headset Port	Yes
Protocols	SIP
Audio Codecs	G.711, G.722, G.729, iLBC
Weight	0.9 kg (1.98 lb)