Cisco 7800 Series Administrator's Guide

Phone Call Cannot Be Established 211
Phone Does Not Recognize DTMF Digits or Digits Are Delayed 212
Troubleshooting Procedures 212
Check DHCP Settings 212
Verify DNS Settings 213
Additional Troubleshooting Information 213
CHAPTER 15 Maintenance 215
Basic Reset 215
Perform Factory Reset Phone Keypad 216
Perform Factory Reset from Phone Menu 216
Voice Quality Monitoring 216
Voice Quality Troubleshooting Tips 217
Cisco IP Phone Cleaning 217
CHAPTER 16 International User Support 219
Unified Communications Manager Endpoints Locale Installer 219
International Call Logging Support 219
Language Limitation 220
Cisco IP Phone 7800 Series Administration Guide for Cisco Unified Communications Manager
x
Contents

Cisco 7800 Series Specifications

General

Wireless	No
Video Support	No
PoE	Yes, 802.3af/at
Audio Codec Support	G.711, G.722, G.729, iLBC
Network Protocols	SIP, SDP, IPv4, IPv6, UDP, TCP, DNS, TFTP, HTTP, HTTPS, DHCP
Security Features	802.1X, TLS, SRTP
Power Options	PoE
Headset Port	3.5mm
Buttons	Line keys, navigation cluster, softkeys, mute, speakerphone, headset, volume control
Bluetooth	No
Ethernet Switch	Yes, 2-port 10/100/1000
USB Port	Yes, for headset (7875)