Checking Power Connection

Chapter 9 Troubleshooting and Maintenance

Troubleshooting Cisco Unified IP Phone Security

Procedure

Step 1 Use the Erase softkey to reset phone settings to their default values. See the “Resetting or Restoring the Cisco Unified IP Phone” section on page 9-13for details.

Step 2 Modify DHCP and IP settings:

a.Disable DHCP. See the “Network Configuration Menu” section on page 4-5for instructions.

b.Assign static IP values to the phone. See the “Network Configuration Menu” section on page 4-5for instructions. Use the same default router setting used for other functioning Cisco Unified IP Phones.

c.Assign TFTP server. See the “Network Configuration Menu” section on page 4-5for instructions. Use the same TFTP server used for other functioning Cisco Unified IP Phones.

Step 3 On the Cisco Unified Communications Manager server, verify that the local host files have the correct Cisco Unified Communications Manager server name mapped to the correct IP address.

Step 4 From Cisco Unified Communications Manager, choose System > Server and verify that the server is referred to by its IP address and not by its DNS name.

Step 5 From Cisco Unified Communications Manager, choose Device > Phone and verify that you have assigned the correct MAC address to this Cisco Unified IP Phone. For information about determining a MAC address, see the “Determining the MAC Address of a Cisco Unified IP Phone” section on page 2-14.

Step 6 Power cycle the phone.

In most cases, a phone will restart if it powers up by using external power but loses that connection and switches to PoE. Similarly, a phone may restart if it powers up by using PoE and then gets connected to an external power supply.

Troubleshooting Cisco Unified IP Phone Security

Table 9-1provides troubleshooting information for the security features on the Cisco Unified IP Phone. For information relating to the solutions for any of these issues, and for additional troubleshooting information about security, refer to Cisco Unified Communications Manager Security Guide.

Table 9-1 Cisco Unified IP Phone Security Troubleshooting

Problem

Possible Cause

CTL File Problems

		Device authentication error.	CTL file does not have a
			Cisco Unified Communications Manager
			certificate or has an incorrect certificate.

		Phone cannot authenticate CTL file.	The security token that signed the updated CTL
			file does not exist in the CTL file on the phone.

		Phone cannot authenticate any of the configuration	There is a bad TFTP record.
		files other than the CTL file.

	Cisco Unified IP Phone 7970G/7971G-GE Administration Guide for Cisco Unified Communications Manager 7.0


9-8			OL-15299-01
9-8			OL-15299-01

7970G, 7971G-GE specifications

The Cisco Systems 7971G-GE is a sophisticated IP phone designed for enterprise communication, offering a range of features that enhance productivity and collaboration. As part of the Cisco Unified Communications portfolio, this phone is known for its impressive technology and reliable performance.

One of the main features of the 7971G-GE is its high-resolution color display. The 5-inch LCD screen provides users with a visually appealing and intuitive interface, allowing for easy navigation through menus and contacts. The phone supports up to six lines, making it ideal for users who require multiple lines for simultaneous calls. Users can effortlessly manage calls with the ability to switch between lines and access important call features like hold, transfer, and conference calling.

In terms of audio quality, the Cisco 7971G-GE is equipped with high-definition voice technology. This feature ensures crystal-clear sound during calls, reducing background noise and enhancing the clarity of conversations. The phone also supports wideband audio codecs, enabling a richer voice experience that is particularly valuable in business environments.

The phone is designed with user convenience in mind. It offers programmable buttons that can be customized to suit individual needs, allowing easy access to frequently used functions or contact lists. Additionally, the presence indicator feature lets users see the availability of their colleagues in real-time, promoting more effective communication and collaboration.

Networking capabilities are another strong point of the Cisco 7971G-GE. The phone supports both Power over Ethernet (PoE) and standard Ethernet connectivity. This enables easy deployment without the need for additional power outlets. Moreover, the device is compatible with various Cisco communication platforms, integrating seamlessly with existing Cisco infrastructure, which is essential for businesses looking to upgrade their communications systems.

Security is a crucial consideration for modern enterprises, and Cisco addresses this with robust encryption features that protect voice and video calls. The phone supports secure signaling and media encryption, ensuring that sensitive conversations remain confidential.

Overall, the Cisco Systems 7971G-GE is a feature-rich IP phone that combines advanced technology with user-friendly design. Its high-definition audio, customizable features, and seamless integration with Cisco networks make it a popular choice for businesses seeking to improve their communication systems. With its reliability and performance, the Cisco 7971G-GE continues to support effective collaboration in an increasingly connected world.

Cisco Systems 7970G Troubleshooting Cisco Unified IP Phone Security, Checking Power Connection

Models: 7970G 7971G-GE

Procedure