Chapter 6 Troubleshooting the Cisco IP Phone

Resolving Startup Problems

Verifying TFTP Server Settings

The Cisco IP Phone uses the TFTP server setting (Settings > Network Configuration > TFTP Server 1) to identify the Cisco CallManager server. If this setting is incorrect, the Cisco IP Phone might continually cycle while attempting to contact the identified TFTP Server.

If you have assigned a static IP address to the phone, you must manually enter this setting. See the “Configuring IP Settings” section on page 4-15.

If you are using DHCP, the phone obtains the address for the TFTP server from the DHCP server. Check the IP address configured in Option 150. Refer to Configuring Windows 2000 DHCP Server for Cisco Call Manager on Cisco.com: http://www.cisco.com/warp/customer/788/AVVID/win2000_dhcp.html

You can also enable the phone to use an alternate TFTP server (Settings > Network Configuration > Alternate TFTP Server). This is particularly useful if this phone was recently moved from a different location, such as a test lab to a production network.

You must unlock the network settings before you can assign an alternate TFTP server (see “Accessing Network Configuration Settings from a Cisco IP Phone” section on page 4-2).

Verifying IP Addressing and Routing

You should verify the IP addressing and routing settings on the IP Phone. If you are using DHCP, the DHCP server should provide these values. If you have assigned a static IP address to the phone, you must enter these values manually.

On the Cisco IP Phone, press Settings > Network Configuration and check for the following problems:

•DHCP Server—has no address

If you have assigned a static IP address to the phone, you do not need to enter a value here. However, if you are using a DHCP server, this field must have a value. If it does not, check your IP routing and VLAN configuration. Refer to Troubleshooting Switch Port Problems on Cisco.com: http://www.cisco.com/warp/customer/473/53.shtml

•IP address, subnet mask, or default router—have no addresses

If you have assigned a static IP address to the phone, you must manually enter these settings. See the “Configuring IP Settings” section on page 4-15.

 

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Cisco Systems 7902G, 7905G, 7912G manual Verifying Tftp Server Settings, Verifying IP Addressing and Routing
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7902G, 7912G, 7905G specifications

Cisco Systems is a leading provider of networking and telecommunications equipment, and among its extensive range of products, the Cisco 7900 Series of IP phones has made a notable impact in enterprise communication. Key models in this series include the Cisco 7905G, 7912G, and 7902G, each designed to enhance productivity through advanced features, intuitive interfaces, and robust technology.

The Cisco 7905G is designed for basic telephony needs and is ideal for administrative environments or areas with high call volumes. It features a large single-line LCD display, providing users with clear visibility of call information. The phone supports Power over Ethernet (PoE), making installation easier and reducing clutter by eliminating the need for an additional power supply. Its hands-free and headset support enhances user convenience, allowing for easy multitasking during calls.

Moving on to the Cisco 7912G, this model is designed for more demanding communication requirements. It features a larger, backlit display, providing improved visibility in various lighting conditions. The Cisco 7912G supports up to 12 programmable line or feature keys, giving users the flexibility to tailor the phone to their specific needs. Additionally, it incorporates advanced audio technologies, such as wideband audio for enhanced voice clarity and a built-in speakerphone, allowing users to communicate effectively in busy environments.

The Cisco 7902G, while offering basic features, is a reliable choice for users who need straightforward, cost-effective telephony solutions. It features an intuitive design with three dedicated buttons for line status, a built-in speakerphone, and support for wideband audio. The phone is geared for users who require essential telephony features without the complexity of additional functionalities, making it suitable for front-desk and general office use.

Overall, these models within the Cisco 7900 series exemplify the company's commitment to providing high-quality enterprise communication tools. With a focus on advanced audio technologies, user-friendly interfaces, and adaptability to various business environments, the Cisco 7905G, 7912G, and 7902G cater to the diverse needs of modern organizations. As companies continue to pursue seamless communication, these IP phones remain a valuable asset in their telephony infrastructure, enhancing collaboration and productivity among teams everywhere.
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