Table Of Contents

An Overview of the Cisco IP Phone

Understanding the Cisco IP Phone 7902G

Understanding the Cisco IP Phone Models 7905G/7912G

What Networking Protocols Are Used?

What Features are Supported on the Cisco IP Phone Models 7902G/7905G/7912G?

Feature Overview

Configuring Telephony Features

Configuring Network Features Using the Cisco IP Phone

Providing Users with Feature Information

Understanding the Requirements for Installing and Configuring the Cisco IP Phone Models 7902G/7905G/7912G

An Overview of the Cisco IP Phone

---

The Cisco IP Phone provides functionality similar to that of a traditional analog phone, but it must be configured and managed like other network devices.

The Cisco IP Phone supports G.711, G.729, G.729a, G.729b, and G.729ab audio compression.

This section covers the following topics:

•Understanding the Cisco IP Phone 7902G

•Understanding the Cisco IP Phone Models 7905G/7912G

•What Features are Supported on the Cisco IP Phone Models 7902G/7905G/7912G?

•Understanding the Requirements for Installing and Configuring the Cisco IP Phone Models 7902G/7905G/7912G

---

Caution Using a cell phone or mobile phone in close proximity to a Cisco IP Phone might cause interference with the speakerphone on your Cisco IP Phone.

---

---

Caution If you plan to power your phone locally (instead of receiving power through the Ethernet connection), use only a Cisco 48V volt power supply designed to work with a Cisco IP Phone.

---

Understanding the Cisco IP Phone 7902G

The Cisco IP Phone 7902G is a basic telephone that provides voice communication over an IP (Internet Protocol) network. This phone allows you to place and receive telephone calls and it supports features that you have come to expect from a basic telephone—such as call hold, call waiting, call forward, call transfer, redial, and conference calling.

The main components of the Cisco IP Phone 7902G are shown in Figure 1-1.

Figure 1-1 Cisco IP Phone 7902G Features

1	Cisco IP Phone series type	Indicates the Cisco IP Phone Series to which your phone belongs.
2	Label and plastic cover	A paper label, protected by a plastic cover, is used to indicate your phone number. You can also note your speed dial numbers on this label.
3	Feature buttons Redial Transfer Conference Messages	Enable you to engage the Redial, Transfer, Conference, and Messages functions.
4	Volume button	Increases or decreases volume for the handset. Also controls the ring volume (if on-hook).
5	Hold button	Places an active call on hold, resumes a held call, or switches between an active call and a held call—depending on the line state.
6	Menu button	Provides access to the Interactive Voice Response (IVR) system.
7	Keypad	Works exactly like the keypad on a traditional telephone.
8	Handset with indicator light	Functions like a traditional handset. The light strip at the top of the handset blinks when the phone rings and remains lit to indicate a new voice message (depending on your voice messaging system).

Understanding the Cisco IP Phone Models 7905G/7912G

The Cisco IP Phone models 7905G/7912G are designed primarily to fulfill requirements for cost-effective IP telephony at the enterprise level, and for small and medium-sized businesses and offices. They also are suitable for locations where a single-line phone is needed, such as cafeterias, break rooms, lobbies, and manufacturing floors.

The main components of the Cisco IP Phone models 7905G/7912G are shown in Figure 1-2.

Figure 1-2 Cisco IP Phone Models 7905G/7912 Features

1	LCD screen	Displays features such as the time, date, your phone number, caller ID, call status, and softkey tabs.
2	Cisco IP Phone series type	Indicates the Cisco IP Phone Series to which your phone belongs.
3	Softkeys	Enable you to engage any of the functions displayed on the corresponding LCD screen tabs. Softkeys point to feature options that are displayed along the bottom of your LCD screen. Softkey functions change depending on the status of your phone (for example, if the phone is active or idle).
4	Navigation button	Enables you to scroll through text and select features displayed on the LCD screen. Also provides access to speed dial numbers when there are no text or features to scroll through.
5	Menu button	Displays a menu that provides access to a voice messaging system, phone logs and directories, settings, and services.
6	Hold button	Puts a current call on hold or takes a call off hold.
7	Keypad	Works exactly like the keypad on a traditional telephone.
8	Volume button	Increases or decreases volume for the handset and speaker. Also controls the ringer volume (if on-hook).
9	Handset	Functions like a traditional handset. The light strip at the top of the handset blinks when the phone rings and remains lit to indicate a new voice message (depending on your voice messaging system).
10	Footstand	Allows the phone to stand at a convenient angle on a desk or table.

What Networking Protocols Are Used?

Cisco IP Phones support several industry-standard and Cisco networking protocols for voice communication. Table 1-1 provides an overview of the networking protocols that the Cisco IP Phone models 7902G/7905G/7912G supports.

Table 1-1 Supported Networking Protocols on the Cisco IP Phone 

Networking Protocol	Purpose	Usage Notes
Cisco Discovery Protocol (CDP)	CDP is a device-discovery protocol that runs on all Cisco-manufactured equipment. Using CDP, a device can advertise its existence to other devices and receive information about other devices in the network.	The Cisco IP Phone uses CDP to communicate information such as auxiliary VLAN ID, per port power management details, and Quality of Service (QoS) configuration information with the Cisco Catalyst switch.
Dynamic Host Configuration Protocol (DHCP)	DHCP dynamically allocates and assigns an IP address to network devices. DHCP enables you to connect an IP phone into the network and have the phone become operational without you needing to manually assign an IP address or configure additional network parameters.	DHCP is enabled by default. If disabled, you must manually configure the IP address, subnet mask, gateway, and an TFTP server on each phone locally. Cisco recommends that you use DHCP custom option 150. With this method, you configure the TFTP server IP address as the option value. For additional supported DCHP configurations, see Cisco CallManager System Guide.
Internet Protocol (IP)	IP is a messaging protocol that addresses and sends packets across the network.	To communicate using IP, network devices must have an assigned IP address, subnet, and gateway. IP addresses, subnets, and gateways identifications are automatically assigned if you are using the Cisco IP Phone with Dynamic Host Configuration Protocol (DHCP). If you are not using DHCP, you must manually assign these properties to each phone locally.
Real-Time Transport (RTP)	RTP is a standard for transporting real-time data, such as interactive voice and video, over data networks.	Cisco IP Phones use the RTP protocol to send and receive real-time voice traffic from other phones and gateways.
Transmission Control Protocol (TCP)	TCP is a a connection-oriented transport protocol.	Cisco IP Phones use TCP to connect to Cisco CallManager and to access XML services.
Trivial File Transfer Protocol (TFTP)	TFTP allows you to transfer files over the network. On the Cisco IP Phone, TFTP enables you to obtain a configuration file specific to the phone type.	TFTP requires a TFTP server in your network, which can be automatically identified from the DHCP server. If more than one TFTP server is running in your network, you must manually assign a TFTP server to each phone locally.
User Datagram Protocol (UDP)	UDP is a connectionless messaging protocol for delivery of data packets.	Cisco IP Phones receive and process UDP messages.

Related Topics

•Modifying DHCP Settings

•Configuring IP Settings

•Configuring TFTP Options

•Understanding Interactions with Other Cisco IP Telephony Products

•Understanding the Phone Startup Process

What Features are Supported on the Cisco IP Phone Models 7902G/7905G/7912G?

The Cisco IP Phone models 7902G/7905G/7912G function much like traditional analog phones, 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 monitor the phone as a network device.

This section includes the following topics:

•Feature Overview

•Configuring Telephony Features

•Configuring Network Features Using the Cisco IP Phone

•Providing Users with Feature Information

Feature Overview

Cisco IP Phones provide traditional telephony functionality, such as call forwarding and transferring, redialing, speed dialing, conference calling, and voice messaging system access. Cisco IP phones also provide a variety of other features. For an overview telephony features the Cisco IP Phone models 7902G/7905G/7912G support, and for tips on configuring them, see the "Configuring Telephony Features Using Cisco CallManager Administration" section.

Like other network devices, you must configure the Cisco IP Phones to prepare them to access Cisco CallManager and the rest of the IP network. Using DHCP, you have fewer settings to modify, but you can choose to assign a static IP if your network requires it. For instructions on configuring the network settings on the Cisco IP Phones, see Chapter 4 "Configuring Network Settings on the Cisco IP Phone."

The Cisco IP Phone models 7905G/7912G can integrate with the corporate Lightweight Directory Access Protocol 3 (LDAP3) standard directory to enable users to search for co-workers contact information directly from their IP phones. For information about configuring this feature, see the "Configuring the Corporate Directory" section.

Because the Cisco IP Phone is a network device, you can obtain detailed status information from it directly. This information can assist you in troubleshooting any problems users might encounter when using their IP phones. See Chapter 6 "Troubleshooting the Cisco IP Phone" for tips on using this information.

Related Topics

•Configuring Network Settings on the Cisco IP Phone

•Configuring Users, Features, and Services

•Troubleshooting the Cisco IP Phone

Configuring Telephony Features

You can modify additional settings from the Cisco CallManager Administration application. Use this web-based application to set up phone registration criteria and calling search spaces, to configure corporate directories, and to modify phone button templates, among other tasks. See the "Configuring Telephony Features Using Cisco CallManager Administration" section and the Cisco CallManager Administration Guide for additional information.

If you are not familiar with the Cisco CallManager Administration application, use the context-sensitive help that is available within the application for guidance. You can access context-sensitive help by choosing Help > For this screen from the main menu bar.

This guide provides partial instructions for procedures that involve Cisco CallManager Administration. These instructions are intended to point you to the appropriate window in the Cisco CallManager application and to provide some initial guidance.

For detailed information about using Cisco CallManager, refer to the Cisco CallManager documentation suite that is available at this location:

http://www.cisco.com/univercd/cc/td/doc/product/voice/c_callmg/index.htm

Related Topic

•Configuring Telephony Features Using Cisco CallManager Administration

Configuring Network Features Using the Cisco IP Phone

You can locally configure features such as DHCP, TFTP, and IP settings on the phone itself. You can also obtain statistics about a current call or firmware versions on the phone.

For more information about configuring features and viewing statistics from the phone, see Chapter 4 "Configuring Network Settings on the Cisco IP Phone" and Chapter 6 "Troubleshooting the Cisco IP Phone."

Related Topics

•Configuring Network Settings on the Cisco IP Phone

•Troubleshooting the Cisco IP Phone

Providing Users with Feature Information

If you are a system administrator, you are likely the primary source of information for Cisco IP Phone users in your network or company. To ensure that you distribute the most current feature and procedural information, familiarize yourself with Cisco IP Phone documentation. Make sure to visit the Cisco IP Phone web site:

http://www.cisco.com/univercd/cc/td/doc/product/voice/c_ipphon/english/index.htm

From this site, you can view and order various user guides, including wallet cards. For complete ordering information, see the "Obtaining Documentation" section.

In addition to providing documentation, it is important to inform users of available Cisco IP Phone features—including features specific to your company or network—and of how to access and customize those features, if appropriate.

For a summary of some of the key information that phone users need their system administrators to provide, see the "Providing Information to Users Via a Web Site" section.

Related Topic

•Providing Information to Users Via a Web Site

Understanding the Requirements for Installing and Configuring the Cisco IP Phone Models 7902G/7905G/7912G

To install and configure the Cisco IP Phone models 7902G/7905G/7912G, you must configure some network settings, set up Cisco CallManager, and make changes locally on the phone.

Refer to Table 1-2 for an overview of required procedures. For detailed information about these steps, refer to the sources shown.

---

Note You can specify additional configuration settings using profile files stored on the TFTP server. For more information, see "Additional Configuration Methods, Parameters, and Procedures."

---

Table 1-2 Overview of Configuration Procedures for the Cisco IP Phone 

Required Task	Purpose	For More Information
1. If the Cisco IP Phone model that you want to configure does not appear in the Phone Type drop-down list in Cisco CallManager, go to the following URL and install the latest support patch for your version of Cisco CallManager: http://www.cisco.com/pcgi-bin/ tablebuild.pl/callmgr-33	The support patch allows Cisco CallManager to identify a Cisco IP Phone.	Refer to instructions on the same web page as the support patch.
2. Gather the following information about the phone: •Model •MAC address •Physical location of the phone •Cisco CallManager user to associate with the phone •Partition, calling search space, and location information, if used •Number of lines and associated directory numbers to assign to the phone •Features to be added and configured to the phone	Required to configure Cisco CallManager to support the Cisco IP Phones.	See the following: •"Adding Phones to the Cisco CallManager Database" section •"Configuring Telephony Features Using Cisco CallManager Administration" section •Cisco CallManager System Guide •Cisco CallManager Administration Guide
3. Configure routers, gateways, and switches to handle voice communication.	Establishes the infrastructure for the IP telephony network.	See the "Understanding How the Cisco IP Phone Interacts with the Cisco Catalyst Family of Switches" section and the documentation included with these devices.
4. Add the phone to Cisco CallManager.	Provides call processing in the IP telephony network.	See the "Adding Phones to the Cisco CallManager Database" section and refer to Cisco CallManager Administration Guide.
5. Choose to auto-register phones, add them to the Cisco CallManager database manually, or use the Bulk Administration Tool (BAT) to add many phones to the database simultaneously.	Determines how the phone is added to Cisco CallManager and how the directory number is assigned.	See the "Adding Phones to the Cisco CallManager Database" section and refer to Cisco CallManager Administration Guide.
6. Choose to power through the Cisco AC adapter or Cisco Catalyst switch.	Determines whether the phone receives power from an external power source over a power cord or from the in-line power source over the Ethernet cable.	See the "Providing Power to the Cisco IP Phone" section or the documentation included with the Cisco Catalyst switch.
7. Install the phone in the network.	Adds the phone to the network.	See Chapter 3 "Installing the Cisco IP Phone".
8. Configure network settings on the Cisco IP Phone.	Sets IP settings (if not using DHCP in the network) and assigns a TFTP server.	See the "Configuring IP Settings" section and the "Configuring TFTP Options" section.
9. Configure the phone features such as call waiting, call forward, call park, and call pickup.	Provides enhanced telephony functionality.	See the "Configuring Telephony Features Using Cisco CallManager Administration" section and refer to Cisco CallManager Administration Guide.
10. Configure directories. Note This task does not apply to the Cisco IP Phone 7902G.	Integrates with a LDAP3 standard directory, enabling users to search through a corporate directory.	See the "Configuring the Corporate Directory" section or refer to Cisco CallManager Administration Guide.
11. Configure Cisco IP Phone services. Note This task does not apply to the Cisco IP Phone 7902G.	Allows users to quickly access information such as weather quotes, stocks quotes, or other web-based information that uses extensible-markup language (XML).	See the "Setting Up Services" section and refer to Cisco CallManager Administration Guide.
12. Configure directories. Note This task does not apply to the Cisco IP Phone 7902G.	Integrates with an LDAP3 standard directory, enabling users to search through a corporate directory.	See the "Configuring the Corporate Directory" section and refer to Cisco CallManager Administration Guide.
13. Add users to Cisco CallManager.	Associates a user with a phone, enabling access to the User Options web-based application where users set up features such as call forwarding and speed dial, and subscribe to services.	See the "Adding Users to Cisco CallManager" section and refer to Cisco CallManager Administration Guide or the Cisco CallManager application online help.
14. Provide information to end users about how to use their phones and how to configure their phone options.	Ensures that users have adequate information to successfully use their Cisco IP Phones.	See the "Providing Information to Users Via a Web Site" section.