Cisco 6821 Administration Guide

Maintenance 319
CHAPTER 14
Basic Reset 319
Perform a Factory Reset with the Phone Keypad 320
Perform Factory Reset from Phone Menu 321
Factory Reset the Phone with the Web UI Button 321
Voice Quality Monitoring 321
Voice Quality Troubleshooting Tips 322
Voice Quality Reporting 323
Supported Scenarios for Voice Quality Reporting 323
Mean Opinion Scores and Codecs 323
Configure Voice Quality Reporting 323
Cisco IP Phone Cleaning 324
View Phone Information 324
Reboot Reasons 324
Reboot History on the Phone Web User Interface 325
Reboot History on the Cisco IP Phone Screen 325
Reboot History in the Status Dump File 325
Phone Behavior During Times of Network Congestion 326
TR-069 Parameter Comparison 327
APPENDIX A
XML and TR-069 Parameter Comparison 327
Cisco IP Phone 6800 Series Multiplatform Phones Administration Guide
xiv
Contents

Cisco 6821 Specifications

General

Resolution	320 x 240 pixels
Speakerphone	Yes
Headset Port	Yes
Protocols	SIP
USB Port	No
Wireless	No
Bluetooth	No
Video Support	No
Conference Capabilities	Yes
Wall Mountable	Yes
Display	3.5-inch grayscale
Ethernet	10/100 Ethernet
Line Keys	2
PoE	IEEE 802.3af Power over Ethernet (PoE)
Codecs	G.711, G.722, G.729, iLBC
Weight	2.0 lb (0.91 kg)