Chapter 9 Troubleshooting the Cisco IP Phone Models 7905G and 7912G

Resolving Problems

A fast-busy tone indicates that the number you called is not valid or that external circuits are busy. Verify the number or try your call again later.

If you place a call to another IP telephone, hear ringback, and the called party answers but you cannot hear the speaker’s voice, verify that the

Cisco IP Phone and the other IP telephone support at least one common audio codec (G.711 A-law, G.711 u-law,or G.729a).

If you use a Cisco PIX firewall, make sure that it is version 5 or later.

Related Topics

Resolving Problems, page 9-2

Contacting TAC, page 9-5

Debugging, page 9-5

Resolving Problems

This section describes errors or unexpected results that you may encounter with the Cisco IP Phone models 7905G and 7912G. It includes possible causes and recommended actions, where appropriate.

Symptom Parameters with values set through a phone’s web interface or LCD screen revert to their original settings.

Possible Cause You are using TFTP for configuring the phone (the UseTFTP parameter is set to 1). Parameter values in a profile will overwrite values that you set from a phone’s Network Configuration menu, its SIP Configuration menu, or its web page.

Recommended Action If you are using TFTP to configure phones, do not use the web page or the phone menus to modify SIP or network parameter values. Use the phone’s Network Configuration menu only to initially configure phone.

 

Cisco IP Phone Models 7905G and 7912G Administrator Guide (SIP)

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Cisco Systems 7905G, 7912G manual Resolving Problems, Related Topics

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.