Cisco 7975G Software Guide

Voice VLAN Setup Errors 221
Phones Have Not Been Intentionally Reset 221
DNS or Other Connectivity Errors 222
Power Connection Problems 222
Cisco Unified IP Phone Security Problems 222
CTL File Problems 222
Authentication Error, Phone Cannot Authenticate CTL File 222
Phone Cannot Authenticate CTL File 223
ITL File Authenticates but Other Configuration Files Do Not Authenticate 223
Phone Does Not Register 223
Signed Configuration Files Are Not Requested 223
802.1X Authentication Problems 224
802.1X Enabled on Phone but Phone Does Not Authenticate 225
802.1X Not Enabled 225
Factory Reset of Phone Has Deleted 802.1X Shared Secret 226
Audio and Video Problems 226
Phone Display Is Wavy 226
No Speech Path 226
General Telephone Call Problems 227
VPN-Connected Phone Does Not Log Calls 227
Phone Does Not Recognize DTMF Digits or Digits Are Delayed 227
Troubleshooting Procedures 227
Set Up Remote Phone 228
Check TFTP Settings 228
Check DHCP settings 228
Verify DNS Settings 229
Create New Phone Configuration File 229
Start Service 230
Determine DNS or Connectivity Issues 231
General Troubleshooting Information 231
General Troubleshooting Tips for Cisco Unified IP Phone Expansion Module 234
Cisco Unified IP Phone Reset or Restore 234
Basic Reset 235
Factory Reset 235
Additional Troubleshooting Information 236
Cisco Unified IP Phone 7975G, 7971G-GE, 7970G, 7965G, and 7945G Administration Guide for Cisco Unified
Communications Manager 9.0 (SCCP and SIP)
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Contents

Cisco 7975G Specifications

General

Handset type	Wired handset
Product type	IP Phone
Product color	Grey, Silver
Speakerphone	Yes
Voice codecs	G.711Mu, G.711a, G.722, G.729A, iLBC
Number of melodies	24
Aspect ratio	4:3
Display diagonal	5.6 \
Display resolution	320 x 240 pixels
Lines quantity	8 lines
Phonebook capacity	- entries
Number of VoIP accounts	-
Front camera	No
Security algorithms	128-bit AES
Networking standards	IEEE 802.1Q, IEEE 802.1p, IEEE 802.1x, IEEE 802.3af
Ethernet LAN data rates	10, 100, 1000 Mbit/s
Ethernet LAN interface type	Gigabit Ethernet
Supported network protocols	DHCP, TFTP
Volume control	Digital
Headphone outputs	1
Ethernet LAN (RJ-45) ports	2
Number of handles included	1 pc(s)
AC adapter output voltage	48 V
Storage temperature (T-T)	-10 - 60 °C
Operating temperature (T-T)	0 - 40 °C
Operating relative humidity (H-H)	10 - 95 %
Certification	FCC

Weight and Dimensions

Depth	152.4 mm
Width	266.7 mm
Height	203.2 mm
Weight	1600 g