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

Resolving Problems

Symptom Time is not displayed or is displayed incorrectly on the phone.

Possible Cause

A Network Time Protocol (NTP) server is not specified for the phone or the NTP server is returning an incorrect time.

The TimeZone parameter (in the profile or a phone’s web page) or the Time Zone parameter (in the Network Configuration menu) is not set correctly.

Recommended Action

Specify at least one NTP server for the phone and check the NTP server.

Verify the setting of the TimeZone or the Time Zone parameter. (You must update the TimeZone or the Time Zone parameter value manually when daylight savings time goes into effect and ends.)

Symptom The phone plays a fast busy tone.

Possible Cause User name or password is incorrect.

Recommended Action Verify that the user name and password are correct.

Symptom Ready screen does not appear on the phone.

Possible Cause

The Cisco IP Phone is trying to obtain the DHCP address or the firmware image is being upgraded.

The Ethernet cable is unplugged.

Recommended Action

Wait for a few moments.

Plug in the Ethernet cable.

 

 

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

 

 

 

 

 

 

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Cisco Systems 7912G, 7905G manual Wait for a few moments Plug in the Ethernet cable

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.