Cisco 7975G Troubleshooting And Maintenance

ExplanationSummary
If the peer to peer image distribution fails, the phone
will default to using the TFTP server to download
firmware. Access the log messages stored on the
remote logging machine to help debug the peer to peer
image distribution feature.
These log messages are different than the
log messages sent to the phone log.
Note
Peer to peer image distribution fails.
If you are having problems getting CVTA to work,
make sure that the PC Port is enabled, and that CDP
is enabled on the PC port.
Cisco VT Advantage/ Unified Video Advantage
(CVTA)
The phone does not have a DHCP IP address, is
unable to register to Cisco Unified Communications
Manager, and shows a Configuring IP or Registering
message.
Verify the following:
1. The Ethernet cable is attached.
2. The Cisco CallManager service is running on the
Cisco Unified Communications Manager server.
3. Both phones are registered to the same Cisco
Unified Communications Manager.
4. Audio server debug and capture logs are enabled
for both phones. If needed, enable Java debug.
Phone call cannot be established
Troubleshooting and Maintenance
18
Troubleshooting and Maintenance
General Troubleshooting Information

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