Cisco 7821 Manual

2. IP PHONE 7841 and 7821
Buttons and Hardware:
The IP Phone 7800 Series has distinct hardware types:
• IP Phone 7821 Two buttons on the left side of the screen
• IP Phone 7841 Two buttons on either side of the screen
Figure 2
. IP Phone 7800 Series Buttons and Features

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)