Cisco 7941G Troubleshooting And Maintenance

the Cisco Unified Communications Manager servers that are part of the assigned Cisco Unified Communications
Manager group. If none of these options contain IP addresses or show Active or Standby, the phone is not
properly registered with Cisco Unified Communications Manager. See Phone Cannot Connect to TFTP Server
or to Cisco Unified Communications Manager, on page 3 for tips on resolving this problem.
Cisco CallManager and TFTP Services Are Not Running
Problem
If the Cisco CallManager or TFTP services are not running, phones may not be able to start up properly. In
such a situation, it is likely that you are experiencing a systemwide failure, and other phones and devices are
unable to start up properly.
Solution
If the Cisco CallManager service is not running, all devices on the network that rely on it to make phone calls
are affected. If the TFTP service is not running, many devices cannot start up successfully. For more
information, see Start Service, on page 15.
Configuration File Corruption
Problem
If you continue to have problems with a particular phone that other suggestions in this chapter do not resolve,
the configuration file may be corrupted.
Solution
Create a new phone configuration file. See Create New Phone Configuration File, on page 15.
Cisco Unified Communications Manager Phone Registration
Problem
The phone is not registered with the Cisco Unified Communications Manager
Solution
A Cisco Unified IP Phone can register with a Cisco Unified Communications Manager server only if the
phone has been added to the server or if auto-registration is enabled. Review the information and procedures
in Cisco Unified Communications Manager Phone Addition Methods to ensure that the phone has been added
to the Cisco Unified Communications Manager database.
To verify that the phone is in the Cisco Unified Communications Manager database, choose Device > Phone>
Find from Cisco Unified Communications Manager Administration to search for the phone based on its MAC
Address. For information about determining a MAC address, see Cisco Unified IP Phone MAC Address
Determination.
If the phone is already in the Cisco Unified Communications Manager database, its configuration file may be
damaged. See Configuration File Corruption, on page 4 for assistance.
Troubleshooting and Maintenance
4
Troubleshooting and Maintenance
Cisco CallManager and TFTP Services Are Not Running

Cisco 7941G Specifications

General

Keypad number of keys	12
Touchscreen	-
Display resolution	320 x 222 pixels
Speakerphone	Yes
Voice codecs	G.729a
Bluetooth	No
Supported network protocols	DHCP, TFTP, SCCP, DSCP
Ethernet LAN (RJ-45) ports	2
Input voltage	48 V
Dimensions (WxDxH)	266.7 x 152.4 x 203.2 mm
Storage temperature (T-T)	-10 - 60 °C
Operating temperature (T-T)	0 - 40 °C
Operating relative humidity (H-H)	10 - 95 %
Handset type	Wired handset
Product type	IP Phone
Product color	Gray
Safety	(UL) 60950, (CSA) C22.2 No. 60950, IEC 60950, EN 60950, AS/NZS 60950
Certification	CE (FCC) 15 (CFR 47) B ICES-003 B EN55022 B CISPR22 B AS/NZ 3548 B VCCI B EN55024 EN 50082-1 EN 61000-3-2 EN 61000-3-3
Compliance industry standards	IEEE 802.3, IEEE 802.3u, IEEE 802.1Q, IEEE 802.3af
Lines quantity	- lines
Phonebook capacity	- entries
Number of handles included	1 pc(s)

Weight and Dimensions

Weight	1600 g