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CHAPTER 1
An Overview of the Cisco Wireless
IP Phone 7920
The Cisco Wireless IP Phone 7920 provides wireless voice communication over
an Internet Protocol (IP) network. Like traditional analog telephones, you can
place and receive phone calls and access features such as mute, hold, transfer, and
speed dial. In addition, because the phone connects to your wireless LAN, you can
place and receive phone calls from anywhere in your wireless environment. You
can also change IP telephony features throu
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Chapter 1 An Overview of the Cisco Wireless IP Phone 7920 Understanding the Cisco Wireless IP Phone 7920 Understanding the Cisco Wireless IP Phone 7920 The Cisco Wireless IP Phone 7920 is an 802.11b wireless IP phone that provides comprehensive voice communications in conjunction with Cisco CallManager and Cisco Aironet 802.11b Access Points (APs) in a private business communications network. Figure 1-1 shows the Cisco Wireless IP Phone 7920. The callout table describes the functions of the
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Chapter 1 An Overview of the Cisco Wireless IP Phone 7920 Understanding the Cisco Wireless IP Phone 7920 1 or Left or Right softkey—Activates the item in the label above the softkey. 2 Answer/Send key—Answers a call or dials a number. 3 Number keys (0-9)—Use these to enter numbers and 1 characters. 2 Number keys (2-9)—Use these to activate Speed Dial hot ABC keys. 4 Asterisk (*) key—Toggles between ring and vibrate mode. When you enter characters, toggles between upper and lower case. Refer
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Chapter 1 An Overview of the Cisco Wireless IP Phone 7920 Understanding the Voice Wireless Network Understanding the Voice Wireless Network Voice over IP (VoIP) telephones use a hard-wired connection to the network for transmitting call control messages and voice packets. With the introduction of wireless communication, mobile wireless IP phones provide similar communication features within the corporate wireless local area network (WLAN). Use the following topics to understand your voice w
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Chapter 1 An Overview of the Cisco Wireless IP Phone 7920 Understanding the Voice Wireless Network Figure 1-2 Wireless LAN with Cisco Wireless IP Phone 7920s M The 802.11 Standard for Wireless LAN Communications Wireless LANs must follow the Institute of Electrical and Electronics Engineers (IEEE) 802.11 standards that define the protocols that govern all Ethernet-based wireless traffic. The 802.11b sub-standard is the most prevalent standard in wireless LAN communications and is commonly c
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Chapter 1 An Overview of the Cisco Wireless IP Phone 7920 Understanding the Voice Wireless Network devices can communicate without interference. Each device has a special code that it uses to identify its data packets and to ignore all others. The Cisco wireless products use DSSS technology to support multiple devices on the WLAN. Wireless Access Points The critical components in the wireless network are the access points (APs) that provide the “hot spots” or wireless links to the network.
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Chapter 1 An Overview of the Cisco Wireless IP Phone 7920 Networking Protocols Used with Cisco Wireless IP Phones Wireless network devices use a service set identifier (SSID).The SSID provides a way to group a set of user devices that can associate with a set of access points. Each wireless device that can use the access point is configured with the same SSID as the AP. Security All wireless LAN traffic is seen by all other WLAN devices that are within range, so securing voice communication
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Chapter 1 An Overview of the Cisco Wireless IP Phone 7920 Networking Protocols Used with Cisco Wireless IP Phones Table 1-1 Supported Networking Protocols on the Cisco Wireless IP Phone Networking Protocol Purpose Usage Notes Wi-Fi (802.11b) 802.11 is an open standard that Cisco Wireless IP Phone 7920 uses defines wireless methods of the 802.11b standard with a range of transmitting Ethernet traffic and is 2.4-2.497 GHz RF and dynamic rate commonly called Wi-Fi. This scaling of 1, 2, 5.5, a
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Chapter 1 An Overview of the Cisco Wireless IP Phone 7920 Networking Protocols Used with Cisco Wireless IP Phones Table 1-1 Supported Networking Protocols on the Cisco Wireless IP Phone (continued) Networking Protocol Purpose Usage Notes Internet Protocol (IP) IP is a messaging protocol that To communicate using IP, network addresses and sends packets across devices must have an assigned IP the network. address, subnet, and gateway. IP addresses, subnets, and gateways identifications are au
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Chapter 1 An Overview of the Cisco Wireless IP Phone 7920 Features Supported on the Cisco Wireless IP Phone 7920 • Configuring TFTP Options, page 5-13 • Configuring TFTP Options, page 5-13 Features Supported on the Cisco Wireless IP Phone 7920 The Cisco Wireless IP Phone 7920 functions much like a traditional analog phone, allowing you to place and receive telephone calls. In addition to traditional telephony features, the Cisco IP Phone includes features that enable you to administer and m
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Chapter 1 An Overview of the Cisco Wireless IP Phone 7920 Features Supported on the Cisco Wireless IP Phone 7920 page 1-12 for more information about configuration options. Because the Cisco IP Phone is a network device, you can obtain detailed status information about it. This information can assist you in troubleshooting problems that users might encounter when using their IP phones. See Chapter 8, “Viewing Status, Statistics, and Firmware Information on the Cisco Wireless IP Phone 7920,”
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Chapter 1 An Overview of the Cisco Wireless IP Phone 7920 Features Supported on the Cisco Wireless IP Phone 7920 Configuring Network Features for the Cisco Wireless IP Phone There are two methods for configuring network features such as DHCP, TFTP, and IP settings and wireless settings for the phone. • Cisco 7920 Configuration Utility • Network Config menu on the Cisco Wireless IP Phone 7920 You can use the Cisco 7920 Configuration Utility on a personal computer and connect to the Cisco Wir
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Chapter 1 An Overview of the Cisco Wireless IP Phone 7920 Understanding the Requirements for Installing and Configuring the Cisco Wireless IP Phone 7920 In addition to providing documentation, it is important to inform users about available Cisco IP Phone features—including features specific to your company or network—and about how to access and customize those features, if appropriate. For a summary the key information that the system administrator can provide to phone users, see Appendix
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Chapter 1 An Overview of the Cisco Wireless IP Phone 7920 Understanding the Requirements for Installing and Configuring the Cisco Wireless IP Phone 7920 Table 1-2 Overview of Configuration Procedures for the Cisco Wireless IP Phone Required Task Purpose For More Information 1. Gather the following You will refer to this information See the “Adding Phones to information about the phone when using the Cisco CallManager the Cisco CallManager for use in Cisco CallManager Administration Phone Dat
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Chapter 1 An Overview of the Cisco Wireless IP Phone 7920 Understanding the Requirements for Installing and Configuring the Cisco Wireless IP Phone 7920 Table 1-2 Overview of Configuration Procedures for the Cisco Wireless IP Phone (continued) Required Task Purpose For More Information 4. Install and Configure Cisco Establishes the coverage, channels, Refer to the Wireless 7920 Aironet Access Points to signal strength, and authentication Design and Deployment handle wireless for the wireless
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Chapter 1 An Overview of the Cisco Wireless IP Phone 7920 Understanding the Requirements for Installing and Configuring the Cisco Wireless IP Phone 7920 Table 1-2 Overview of Configuration Procedures for the Cisco Wireless IP Phone (continued) Required Task Purpose For More Information 8. Configure wireless network Sets SSID, authentication type, and See the “Configuring the settings on the Cisco Wireless transmission rate and power for the Wireless Network Settings IP Phone or by using the
