Chapter 7 Viewing Security Information, Model Information, Status, and Statistics on the Cisco Unified IP Phone

Security Configuration Menu

Table 7-1provides a list of the CTL File items and a description of each.

Table 7-1 CTL File Information

Item

Description

 

 

 

 

CTL File

Displays the MD5 hash of the certificate trust list

 

(CTL) file that is installed in the phone.

 

A locked padlock icon

in this option indicates

 

that the CTL file is locked.

 

 

An unlocked padlock icon

indicates that the

 

CTL file is unlocked.

 

 

 

CAPF Server

IP address of the CAPF server used by the phone.

 

Also displays a certificate icon if a certificate is

 

installed for this server.

 

 

 

CallManager / TFPT

IP address of a Cisco Unified CallManager and

Server

TFTP server used by the phone. Also displays a

 

certificate

icon if a certificate is installed for this

 

server.

 

 

 

 

 

 

To add or change the primary CallManager / TFTP server (TFTP Server 1) or secondary (TFTP Server 2) in the CTL File, you must unlock the CTL file before you can save changes. You must use the Network Configuration menu to make changes to the TFTP Server 1 option or to the TFTP Server 2 option. (For information about changing these options, see the “Network Configuration Menu” section on page 4-7.)

To unlock the CTL file from the Security Configuration screen, follow these steps:

Procedure

Step 1 Press **# to unlock options on the CTL File menu.

If you decide not to continue, press **# again to lock options on this menu.

Step 2 Highlight the CTL option.

Step 3 Press the Unlock softkey to unlock the CTL file.

After you change and save the TFTP Server 1 or the TFTP Server 2 option, the CTL file will be locked automatically.

 

Cisco Unified IP Phone 7906G and 7911G Administration Guide for Cisco Unified CallManager

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Cisco Systems 7906G, 7911G manual CTL File Information

7906G, 7911G specifications

The Cisco Systems 7911G is a versatile IP phone designed to enhance communication in enterprise environments. Targeting workers in various organizational settings, this model is known for its reliability, ease of use, and robust features that cater to both basic and advanced telephony requirements.

One of the key features of the Cisco 7911G is its support for Voice over IP (VoIP) technology. Using this technology allows for the transmission of voice signals over the internet rather than through traditional telephone lines. This not only reduces telephony costs but also offers enhanced functionality that integrates seamlessly with existing communication systems.

The phone is equipped with a monochrome graphical display that provides users with clear visibility of their call status, directory information, and menu options. With a resolution of 128x64 pixels, the screen is large enough to offer important information without overwhelming the user. This simplicity makes it an ideal choice for users who require straightforward functionality without the complexity of advanced features.

Ergonomically designed, the Cisco 7911G features a comfortable keypad with dedicated buttons for frequently used functions such as mute, hold, and transfer. It supports multiple lines, providing users with the ability to manage multiple calls simultaneously. Additionally, it offers programmable line keys that can be customized for speed dial or as soft keys for quick access to features.

The device supports Power over Ethernet (PoE), which allows the phone to receive power through the network cable rather than needing a separate power source. This feature not only simplifies installation but also enhances mobility within the workspace, as it reduces cable clutter.

Another significant characteristic of the Cisco 7911G is its compatibility with Cisco Unified Communications Manager, which ensures centralized management of telephony systems. It also supports a range of audio codecs that help in delivering high-quality audio during calls, reducing latency and improving overall communication quality.

Security is also a focus with the Cisco 7911G, as it features a secure access feature that includes Transport Layer Security (TLS) and Secure Real-Time Transport Protocol (SRTP) for encrypted voice communications. This ensures that sensitive conversations are protected from eavesdropping.

Overall, the Cisco Systems 7911G is a reliable, feature-rich IP phone that provides an excellent solution for organizations looking to upgrade their communication systems. Its combination of user-friendly design, powerful integrations, and security features makes it a cornerstone in the suite of Cisco telecommunications solutions.