Chapter 6 Configuring the Cisco IP Phone Models 7905G and 7912G Using a TFTP Server

Configuring the Cisco IP Phone to Obtain its Configuration File from the TFTP Server

can be set in the bootfile name field of the DHCP header. This field is limited to 31 characters, even though the DHCP specification allows for a longer bootfile name.

You can configure the following phone configuration parameters using DHCP:

•Client IP address

•DHCP option 1: Client subnet mask

•DHCP option 3: Routers on the client’s subnet

•DHCP option 6: Domain Name System (DNS) server (up to two)

•DHCP option 42: Network Time Protocol (NTP) server (up to two)

•DHCP option 66: TFTP server

The values for DNS server, NTP server, and TFTP server can be overwritten by values in the corresponding parameters in the phone profile (DNS1IP, DNS2IP, NTPIP, AltNTPIP, and TftpURL). If these parameters are not set to 0, their values are used in place of those corresponding values that are supplied by the DHCP options.

Without Using a DHCP Server

If you are not using a DHCP server in your environment but are still using a TFTP server to obtain the Cisco IP Phone profile, follow these steps so that the Cisco IP Phone can contact the TFTP server without using DHCP:

Procedure

Step 1 Set the DHCP Enabled parameter on the phone’s Network Configuration menu to No or set the Dhcp parameter on the phone’s web page to 0.

Step 2 Set the TFTP Enabled parameter on the phone’s Network Configuration menu to Yes or set the UseTftp parameter on the phone’s web page to 1.

Step 3 Set the TFTP Server parameter on the phone’s Network Configuration menu to the IP address or the URL of the TFTP server or set the TftpURL parameter on the phone’s web page to the IP address or the URL of the TFTP server.

Step 4 If you have done already done so, statically configure the following parameters using the phone’s Network Configuration menu. These parameters are required for the phone to obtain network connectivity:

 

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

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Cisco Systems 7905G, 7912G manual Without Using a Dhcp Server
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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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