Chapter 6 Troubleshooting the Cisco IP Phone

Resolving Startup Problems

To determine whether the phone is functional, you must eliminate any other potential problems, such as faulty cables, network outages, lack of power, and so on. Follow these suggestions to systematically eliminate these other causes.

Procedure

Step 1 To verify that the network port is functional:

a.Exchange the Ethernet cables with cables you know are functional.

b.Disconnect a functioning Cisco IP Phone from another port and connect it to this network port to verify the port is active.

c.Connect the Cisco IP Phone that will not start up to a different network port that you know to be good.

d.Connect the Cisco IP Phone that will not start up directly to the port on the switch, eliminating the patch panel connection in the office.

Step 2 To verify that the phone is receiving power:

a.Verify that the electrical outlet is functional.

b.If you are using in-line power, use the external power supply instead.

c.If you are using the external power supply, switch with a unit you know to be functional.

Step 3 Cisco IP Phone models 7905G/7912G only. If, after attempting these solutions, the LCD screen persists in not displaying any characters for at least five minutes, contact a Cisco technical support representative for additional assistance.

Symptom: Cisco IP Phone Not Registering with

Cisco CallManager

If a phone proceeds past the first stage (LED buttons flashing on and off), and, on a Cisco IP Phone model 7905G/7912G, continues to cycle through the messages displaying on the LCD screen, then the phone is not starting up properly. The phone cannot successfully start up unless it is connected to the Ethernet network and it has registered with a Cisco CallManager server.

 

Cisco IP Phone Administration Guide for Cisco CallManager 3.3, Cisco IP Phones 7902G/7905G/7912G

OL-6313-01

6-13

Page 126 Page 128
Page 127
Image 127
Cisco Systems 7905G, 7902G, 7912G manual Procedure
Page 126 Page 128

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.
Top Page Image Contents