Cisco Systems IP Phone OL 8148 01 User Manual

C H A P T E R  
2
Preparing to Install the Cisco  
Unified IP Phone on Your Network  
Cisco Unified IP Phones enable you to communicate using voice over a data  
network. To provide this capability, the IP Phones depend upon and interact with  
several other key Cisco IP Telephony and network components, including  
Cisco Unified CallManager, DNS and DHCP servers, TFTP servers, media  
resources, Cisco prestandard PoE, and so on.  
This chapter focuses on the interactions between the Cisco Unified IP Phone 7970  
Series and Cisco Unified CallManager, DNS and DHCP servers, TFTP servers,  
and switches. It also describes options for powering phones.  
For related information about voice and IP communications, refer to this URL:  
This chapter provides an overview of the interaction between the  
Cisco Unified IP Phone 7970 Series and other key components of the Voice over  
IP (VoIP) network. It includes these topics:  
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Chapter 2 Preparing to Install the Cisco Unified IP Phone on Your Network  
Understanding Interactions with Other Cisco Unified IP Communications Products  
For information about configuring Cisco Unified CallManager to work with the  
IP devices described in this chapter, refer to Cisco Unified CallManager  
Administration Guide, Cisco Unified CallManager System Guide, and to Cisco  
Unified CallManager Security Guide.  
For an overview of security functionality for the Cisco Unified IP Phone, see the  
“Understanding Security Features for Cisco Unified IP Phones” section on  
page 1-11.  
Note  
If the Cisco Unified IP Phone model that you want to configure does not appear  
in the Phone Type drop-down list in Cisco Unified CallManager Administration,  
go to the following URL and install the latest support patch for your version of  
Cisco Unified CallManager:  
Related Topic  
Telephony Features Available for the Phone, page 5-2  
Understanding How the Cisco Unified IP Phone Interacts with the  
VLAN  
The Cisco Unified IP Phone 7970 Series have an internal Ethernet switch,  
enabling forwarding of packets to the phone, and to the access port and the  
network port on the back of the phone.  
If a computer is connected to the access port, the computer and the phone share  
the same physical link to the switch and share the same port on the switch. This  
shared physical link has the following implications for the VLAN configuration  
on the network:  
The current VLANs might be configured on an IP subnet basis. However,  
additional IP address might not be available to assign the phone to the same  
subnet as other devices connect to the same port.  
Data traffic present on the data/native VLAN may reduce the quality of  
Voice-over-IP traffic.  
Network security may indicate a need to isolate the VLAN voice traffic from  
the VLAN data traffic.  
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Chapter 2 Preparing to Install the Cisco Unified IP Phone on Your Network  
Providing Power to the Phone  
You can resolve these issues by isolating the voice traffic onto a separate VLAN.  
The switch port that the phone is connected to would be configured to have  
separate VLANs for carrying:  
Voice traffic to and from the IP phone (auxiliary VLAN, on the Cisco Catalyst  
6000 series, for example)  
Data traffic to and from the PC connected to the switch through the access  
port of the IP phone (native VLAN)  
Isolating the phones on a separate, auxiliary VLAN improves the quality of the  
voice traffic and allows a large number of phones to be added to an existing  
network where there are not enough IP addresses for each phone.  
For more information, refer to the documentation included with a Cisco switch.  
You can also access related documentation at this URL:  
Related Topics  
Network Configuration Menu, page 4-7  
Providing Power to the Phone  
Models in the Cisco Unified IP Phone 7970 Series can be powered with external  
power or with Power over Ethernet (PoE). External power is provided through a  
separate power supply. PoE is provided by a switch through the Ethernet cable  
attached to a phone.  
Note  
When you install a phone that is powered with external power, connect the power  
supply to the phone and to a power outlet before you connect the Ethernet cable  
to the phone. When you remove a phone that is powered with external power,  
disconnect the Ethernet cable from the phone before you disconnect the power  
supply.  
These sections provide more information about powering a phone:  
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Chapter 2 Preparing to Install the Cisco Unified IP Phone on Your Network  
Providing Power to the Phone  
Power Guidelines  
Table 2-1 provides guidelines that apply to external power and to PoE power for  
phones the Cisco Unified IP Phone 7970 Series.  
Table 2-1 Guidelines for Pow ering the Cisco Unified IP Phone 7970 Series  
Power Type  
Guidelines  
External power—  
The Cisco Unified IP Phone 7970G and 7971G-GE use the  
Provided through the  
CP-PWR-CUBE-3  
external power supply  
CP-PWR-CUBE-3 power supply.  
PoE power—Provided by  
a switch through the  
Ethernet cable attached to  
the phone  
The inline power patch panel WS-PWR-PANEL is not compatible  
with the Cisco Unified IP Phone.  
To ensure uninterruptible operation of the phone, make sure that the  
switch has a backup power supply.  
Make sure that the CatOS or IOS version running on your switch  
supports your intended phone deployment. Refer to the documentation  
for your switch for operating system version information.  
Phone Power Consumption and Display Brightness  
The power consumed by a phone depends on its power configuration. See  
Table 2-1 for a power configuration overview. See Table 2-2 for the maximum  
power consumed by a phone for each configuration option and the correlating  
phone screen brightness level.  
Note  
Power consumption values shown in the table include power losses in the cable  
that connects the phone to the switch.  
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Providing Power to the Phone  
Table 2-2 Power Consum ption and Display Brightness for Power Configurations  
Max. Power  
Consumed  
Phone  
Screen  
Phone Model  
Power Configuration  
from a Switch Brightness  
Cisco Unified Cisco prestandard PoE from a switch that supports a  
6.3 W  
6.3 W  
6.3 W  
Approx. 1/2  
Approx. 1/2  
IP Phone  
7970G  
maximum of 7 W power per port, with bidirectional  
power negotiation enabled  
Cisco prestandard PoE from a Cisco Switch that  
supports 7 W or 15.4 W power per port, without  
bidirectional power negotiation  
IEEE 802.3af Class 3 power from a Cisco switch,  
without bidirectional power negotiation  
Approx. 1/2  
Approx. 1/2  
IEEE 802.3af Class 3 power from a third-party switch 6.3 W  
1
IEEE 802.3af Class 3 power from a Cisco switch, with 10.25 W  
bidirectional power negotiation enabled  
Full  
Cisco prestandard PoE from a Cisco Switch that  
supports 15.4 W power per port, with bidirectional  
power negotiation enabled  
10.25 W  
Full  
External power  
Full  
Cisco Unified IEEE 802.3af Class 3 power from a Cisco switch (with 15.4 W  
Near full  
IP Phone  
7971G-GE  
or without bidirectional power negotiation enabled) or  
from a third-party switch  
External power  
Full  
1. Starts at approximately 1/2 brightness, changes to full brightness when the phone negotiates additional power.  
Note  
When a phone is powered with a method that does not support full brightness for  
the phone screen, the phone Brightness control (Settings > User Preferences >  
Brightness) will not allow you to set the brightness to the maximum value.  
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Chapter 2 Preparing to Install the Cisco Unified IP Phone on Your Network  
Providing Power to the Phone  
Power Outage  
Your accessibility to emergency service through the phone is dependent on the  
phone being powered. If there is an interruption in the power supply, Service and  
Emergency Calling Service dialing will not function until power is restored. In the  
case of a power failure or disruption, you may need to reset or reconfigure  
equipment before using the Service or Emergency Calling Service dialing.  
Obtaining Additional Information about Power  
For related information about power, refer to the documents shown in Table 2-3.  
These documents provide information about these topics:  
Cisco switches that work with the Cisco Unified IP Phone 7970 Series  
The Cisco IOS releases that support bidirectional power negotiation  
Other requirements and restrictions regarding power  
Table 2-3 Related Docum entation for Power  
Document Topics  
URL  
PoE Solutions  
Cisco Catalyst Switches  
Integrated Service Routers  
Cisco IOS Software  
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Understanding Phone Configuration Files  
Understanding Phone Configuration Files  
Configuration files for a phone are stored on the TFTP server and define  
parameters for connecting to Cisco Unified CallManager. In general, any time you  
make a change in Cisco Unified CallManager that requires the phone to be reset,  
a change is made to the phone’s configuration file automatically.  
Configuration files also contain information about which image load the phone  
should be running. If this image load differs from the one currently loaded on a  
phone, the phone contacts the TFTP server to request the required load files.  
(These files are digitally signed to ensure the authenticity of the files’ source.)  
In addition, if the device security mode in the configuration file is set to  
Authenticated and the CTL file on the phone has a valid certificate for Cisco  
Unified CallManager, the phone establishes a TLS connection to Cisco  
Unified CallManager. Otherwise, the phone establishes a TCP connection.  
Note  
If the device security mode in the configuration file is set to Authenticated or  
Encrypted, but the phone has not received a CTL file, the phone will continuously  
try to obtain a CTL file so that it can register securely.  
If you configure security-related settings in Cisco Unified CallManager  
Administration, the phone configuration file will contain sensitive information.  
To ensure the privacy of a configuration file, you must configure it for encryption.  
For detailed information, refer to the “Configuring Encrypted Phone  
Configuration Files” chapter in Cisco Unified CallManager Security Guide.  
A phone accesses a default configuration file named XmlDefault.cnf.xml from the  
TFTP server when these conditions exist:  
You have enabled auto-registration in Cisco Unified CallManager  
The phone has not been added to the Cisco Unified CallManager Database  
The phone is registering for the first time  
If auto registration is not enabled and the phone has not been added to the Cisco  
Unified CallManager Database, the phone registration request will be rejected. In  
this case, the phone will reset and attempt to register repeatedly.  
If the phone has registered before, the phone will access the configuration file  
named SEPmac_address.cnf.xml, where mac_address is the MAC address of the  
phone.  
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Chapter 2 Preparing to Install the Cisco Unified IP Phone on Your Network  
Understanding the Phone Startup Process  
Understanding the Phone Startup Process  
When connecting to the VoIP network, the Cisco Unified IP Phone goes through  
a standard startup process, as described in Table 2-4. Depending on your specific  
network configuration, not all of these process steps may occur on your Cisco  
Unified IP Phone.  
Table 2-4 Cisco Unified IP Phone Startup Process  
Process Step  
Description  
Related Topics  
1. Obtaining Power  
If a phone is not using external power, the switch See the “Providing  
provides in-line power through the Ethernet cable Power to the Phone”  
from the Switch  
attached to the phone.  
See the “Resolving  
Startup Problems”  
section on page 9-2.  
2. Loading the Stored  
The Cisco Unified IP Phone has non-volatile Flash See the “Resolving  
Phone Image  
memory in which it stores firmware images and  
user-defined preferences. At startup, the phone  
runs a bootstrap loader that loads a phone image  
stored in Flash memory. Using this image, the  
phone initializes its software and hardware.  
Startup Problems”  
section on page 9-2.  
3. Configuring VLAN  
If the Cisco Unified IP Phone is connected to a  
See the “Network  
Cisco switch, the switch next informs the phone of Configuration Menu”  
the voice VLAN defined on the switch port. The section on page 4-7.  
phone needs to know its VLAN membership  
See the “Resolving  
before it can proceed with the Dynamic Host  
Startup Problems”  
Configuration Protocol (DHCP) request for an IP  
section on page 9-2.  
address.  
4. Obtaining an IP  
If the Cisco Unified IP Phone is using DHCP to  
See the “Network  
Address  
obtain an IP address, the phone queries the DHCP Configuration Menu”  
server to obtain one. If you are not using DHCP in section on page 4-7.  
your network, you must assign static IP addresses  
to each phone locally.  
Startup Problems”  
See the “Resolving  
section on page 9-2.  
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Chapter 2 Preparing to Install the Cisco Unified IP Phone on Your Network  
Understanding the Phone Startup Process  
Table 2-4 Cisco Unified IP Phone Startup Process (continued)  
Process Step  
Description  
In addition to assigning an IP address, the DHCP See the “Network  
server directs the Cisco Unified IP Phone to a Configuration Menu”  
Related Topics  
5. Accessing a TFTP  
Server  
TFTP Server. If the phone has a statically-defined section on page 4-7.  
IP address, you must configure the TFTP server  
See the “Resolving  
locally on the phone; the phone then contacts the  
Startup Problems”  
TFTP server directly.  
section on page 9-2.  
Note  
You can also assign an alternative TFTP  
server to use instead of the one assigned by  
DHCP.  
6. Requesting the CTL The TFTP server stores the certificate trust list  
Refer to the Cisco  
file  
(CTL) file. This file contains a list of Cisco  
Unified CallManager  
Unified CallManagers and TFTP servers that the Security Guide,  
phone is authorized to connect to. It also contains “Configuring the Cisco  
the certificates necessary for establishing a secure CTL Client” chapter.  
connection between the phone and Cisco  
Unified CallManager.  
7. Requesting the  
The TFTP server has configuration files, which  
define parameters for connecting to Cisco  
Unified CallManager and other information for  
the phone.  
Configuration File  
See the “Resolving  
Startup Problems”  
section on page 9-2.  
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Chapter 2 Preparing to Install the Cisco Unified IP Phone on Your Network  
Adding Phones to the Cisco Unified CallManager Database  
Table 2-4 Cisco Unified IP Phone Startup Process (continued)  
Process Step  
Description  
Related Topics  
8. Contacting Cisco  
Unified CallManager  
The configuration file defines how the Cisco  
Unified IP Phone communicates with Cisco  
See the “Resolving  
Startup Problems”  
Unified CallManager and provides a phone with section on page 9-2.  
its load ID. After obtaining the file from the TFTP  
server, the phone attempts to make a connection to  
the highest priority Cisco Unified CallManager on  
the list. If security is implemented, the phone  
makes a TLS connection. Otherwise, it makes a  
non-secure TCP connection.  
If the phone was manually added to the database,  
Cisco Unified CallManager identifies the phone.  
If the phone was not manually added to the  
database and auto-registration is enabled in Cisco  
Unified CallManager, the phone attempts to  
auto-register itself in the Cisco  
Unified CallManager database.  
Note  
Auto-registration is disabled when  
security is enabled on Cisco  
Unified CallManager. In this case, the  
phone must be manually added to the  
Cisco Unified CallManager database.  
Adding Phones to the Cisco Unified CallManager  
Database  
Before installing the Cisco Unified IP phone, you must choose a method for  
adding phones to the Cisco Unified CallManager database. These sections  
describe the methods:  
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Chapter 2 Preparing to Install the Cisco Unified IP Phone on Your Network  
Adding Phones to the Cisco Unified CallManager Database  
Table 2-5 provides an overview of these methods for adding phones to the  
Cisco Unified CallManager database.  
Table 2-5 Methods for Adding Phones to the Cisco Unified CallManager  
Database  
Requires MAC  
Method  
Address?  
Notes  
Auto-registration  
No  
Provides no control over directory  
number assignment to phone.  
Not available when security or  
encryption is enabled.  
Auto-registration  
with TAPS  
No  
Requires auto-registration and the Bulk  
Administration Tool (BAT); updates the  
Cisco Unified CallManager database  
with the MAC address and DNs for the  
device when user calls TAPS from the  
phone.  
Using the Cisco  
Unified  
CallManager  
Administration  
Yes  
Yes  
Must add phones individually.  
Using BAT  
Can add groups of same model of phone.  
Can schedule when phones are added to  
the Cisco Unified CallManager  
database.  
Adding Phones with Auto-Registration  
By enabling auto-registration before you begin installing phones, you can:  
Automatically add a Cisco Unified IP Phone to the Cisco Unified  
CallManager database when you physically connect the phone to your IP  
telephony network. During auto-registration, Cisco Unified CallManager  
assigns the next available sequential directory number to the phone.  
Add phones without first gathering MAC addresses from the phones.  
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Chapter 2 Preparing to Install the Cisco Unified IP Phone on Your Network  
Adding Phones to the Cisco Unified CallManager Database  
Quickly enter phones into the Cisco Unified CallManager database and  
modify any settings, such as the directory numbers, from  
Cisco Unified CallManager.  
Move auto-registered phones to new locations and assign them to different  
device pools without affecting their directory numbers.  
Note  
You should use auto-registration to add less than 100 phones to your network. To  
add more than 100 phones to your network, use the Bulk Administration Tool  
In some cases, you might not want to use auto-registration: for example, if you  
want to assign a specific directory number to the phone or if you plan to  
implement authentication or encryption, as described in Cisco Unified  
CallManager Security Guide. For information about enabling auto-registration,  
refer to “Enabling Auto-Registration” in the Cisco Unified CallManager  
Administration Guide.  
Note  
Cisco Unified CallManager automatically disables auto-registration if you  
configure the cluster-wide security mode for authentication and encryption  
through the Cisco CTL client.  
Related Topics  
Adding Phones with Auto-Registration and TAPS  
TAPS, the Tool for Auto-Registered Phones Support, works with the Bulk  
Administration Tool (BAT) to update a batch of phones that were already added  
to the Cisco Unified CallManager database with dummy MAC addresses. You use  
TAPS to update MAC addresses and download pre-defined configurations for  
phones.  
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Chapter 2 Preparing to Install the Cisco Unified IP Phone on Your Network  
Adding Phones to the Cisco Unified CallManager Database  
You can add phones with auto-registration and TAPS without first gathering  
MAC addresses from phones.  
Note  
You should use auto-registration and TAPS to add less than 100 phones to your  
network. To add more than 100 phones to your network, use the Bulk  
Administration Tool (BAT). See the “Adding Phones with BAT” section on  
To implement TAPS, you or the end-user dial a TAPS directory number and follow  
voice prompts. When the process is complete, the phone will have downloaded its  
directory number and other settings, and the phone will be updated in  
Cisco Unified CallManager Administration with the correct MAC address.  
Auto-registration must be enabled in Cisco Unified CallManager Administration  
(System > Cisco CallManager) for TAPS to function.  
Note  
Cisco Unified CallManager automatically disables auto-registration if you  
configure the cluster-wide security mode for authentication and encryption  
through the Cisco CTL client.  
Refer to Cisco Unified CallManager Bulk Administration Guide for detailed  
instructions about BAT and about TAPS.  
Related Topics  
Adding Phones with Cisco Unified CallManager Administration  
You can add phones individually to the Cisco Unified CallManager database  
using Cisco Unified CallManager Administration. To do so, you first need to  
obtain the MAC address for each phone.  
For information about determining a MAC address, see the “Determining the  
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Chapter 2 Preparing to Install the Cisco Unified IP Phone on Your Network  
Adding Phones to the Cisco Unified CallManager Database  
After you have collected MAC addresses, in Cisco Unified CallManager  
Administration, choose Device > Phone and click Add New to begin.  
For complete instructions and conceptual information about Cisco Unified  
CallManager, refer to Cisco Unified CallManager Administration Guide and to  
Cisco Unified CallManager System Guide.  
Related Topics  
Adding Phones with BAT  
The Cisco Bulk Administration Tool (BAT) is a plug-in application for  
Cisco Unified CallManager that enables you to perform batch operations,  
including registration, on multiple phones.  
Before you can add phones using BAT only (not in conjunction with TAPS), you  
must obtain the MAC address for each phone.  
For information about determining a MAC address, see the “Determining the  
For detailed instructions about using BAT, refer to Cisco Unified CallManager  
Administration Guide and to Cisco Unified CallManager Bulk Administration  
Guide.  
Related Topics  
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Chapter 2 Preparing to Install the Cisco Unified IP Phone on Your Network  
Using Cisco Unified IP Phones with Different Protocols  
Using Cisco Unified IP Phones with Different  
Protocols  
The Cisco Unified IP Phone can operate with SCCP (Skinny Client Control  
Protocol) or SIP (Session Initiation Protocol). You can convert a phone that is  
using one protocol for use with the other protocol.  
This section includes these topics:  
Converting a New Phone from SCCP to SIP  
A new, unused phone is set for SCCP by default. To convert this phone to SIP,  
perform these steps:  
Procedure  
Step 1  
Take one of these actions:  
To auto-register the phone, set the Auto Registration Phone Protocol  
parameter in Cisco Unified CallManager Administration to SIP.  
To provision the phone using the Bulk Administration Tool (BAT), choose the  
appropriate phone model and choose SIP from the BAT.  
To provision the phone manually, make the appropriate changes for SIP on  
the Phone Configuration page in Cisco Unified CallManager Administration.  
Refer to Cisco Unified CallManager Administration Guide for detailed  
information about Cisco Unified CallManager configuration. Refer to Cisco  
Unified CallManager Bulk Administration Guide for detailed information about  
using the BAT.  
Step 2  
If you are not using DHCP in your network, configure the network parameters for  
the phone.  
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Chapter 2 Preparing to Install the Cisco Unified IP Phone on Your Network  
Using Cisco Unified IP Phones with Different Protocols  
See the “Configuring Startup Network Settings” section on page 3-14.  
Power cycle the phone.  
Step 3  
Converting an In-Use Phone from SCCP to SIP  
You can use the Bulk Administration Tool (BAT) to convert a phone that is in use  
in your network from SCCP to SIP. To access BAT from Cisco Unified  
CallManager Administration, choose Bulk Administration > Phones > Migrate  
Phones > SCCP to SIP. For detailed information, refer to Cisco Unified  
CallManager Bulk Administration Guide.  
Converting an In-Use Phone from SIP to SCCP  
To convert a phone that is in use in your network from SIP to SCCP, perform these  
steps. For more information, Cisco Unified CallManager Administration Guide.  
Procedure  
Step 1  
Step 2  
Step 3  
In Cisco Unified CallManager Administration, delete the existing SIP phone from  
the Cisco Unified CallManager database.  
In Cisco Unified CallManager Administration, create the phone as an SCCP  
phone.  
Power cycle the phone.  
Deploying a Phone in an SCCP and SIP Environment  
To deploy Cisco Unified IP Phones in an environment that includes SCCP and SIP  
and in which the Cisco Unified CallManager Auto-Registration parameter is  
SCCP, perform these general steps:  
1. Set the Cisco Unified CallManager auto_registration_protocol parameter to  
SCCP.  
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Chapter 2 Preparing to Install the Cisco Unified IP Phone on Your Network  
Determining the MAC Address of a Cisco Unified IP Phone  
To do so, from Cisco Unified CallManager Administration, choose System >  
Enterprise Parameters.  
2. Install the phones.  
3. Change the auto_registration_protocol parameter to SIP.  
4. Auto-register the SIP phones.  
Determining the MAC Address of a Cisco  
Unified IP Phone  
You can determine the MAC address for a phone in any of these ways:  
From the phone, choose Settings > Model Information and look at the  
MAC Address field.  
Look at the MAC label on the back of the phone.  
Display the web page for the phone and click the Device Information  
hyperlink.  
For information about accessing the web page, see the “Accessing the Web  
Page for a Phone” section on page 8-2.  
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