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Setting Up the Cisco Unified Wireless
IP Phone 7921G
This chapter includes the following topics, which help you install and configure
the Cisco Unified Wireless IP Phone 7921G on an IP telephony network:
• Before You Begin, page 3-1
• Installing the Cisco Unified Wireless IP Phone 7921G, page 3-10
• Understanding the Phone Startup Process, page 3-26
Before You Begin
Before installing a Cisco Unified Wireless IP Phone 7921G, review the
requirements in these sections:
• Network Requirements, page 3-1
• Methods for Adding Phones to Cisco Unified CallManager, page 3-3
• Safety Information, page 3-6
CHA PT ER
3
Network Requirements
For the Cisco Unified Wireless IP Phone 7921G to successfully operate as a Cisco
Unified IP Phone endpoint, your network must support these requirements:
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Before You Begin
Note You must verify that your wireless network is configured properly for voice
Chapter 3 Setting Up the Cisco Unified Wireless IP Phone 7921G
Voice-over-Wireless Network (VoWLAN)
• Cisco Aironet Access Points configured to support Voice over WLAN
(VoWLAN)
• Controllers and switches configured to support VoWLAN
• Security implemented for authenticating wireless voice devices and users
service. For more information, see the “Performing a Site Survey Verification”
section on page 2-31
Voice-over-IP (VoIP) Network
• Cisco routers and gateways configured for Voice over IP (VoIP)
• One of these call control products installed and configured:
–
Cisco Unified CallManager Release 4.1, 4.2 or 5.0 and later
–
Cisco Unified CallManager Express 4.1 or later
• IP network configured to support DHCP or manual assignment of IP address,
gateway, and subnet mask
3-2
Related Topics
• Features Supported on the Cisco Unified Wireless IP Phone 7921G, page 1-5
• Understanding the Wireless LAN, page 2-1
• Methods for Adding Phones to Cisco Unified CallManager, page 3-3
• Installing the Cisco Unified Wireless IP Phone 7921G, page 3-10
• Powering On the Cisco Unified Wireless IP Phone 7921G, page 3-23
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Before You Begin
Methods for Adding Phones to Cisco Unified CallManager
Before installing the wireless IP phone, you must choose a method for adding
phones to the Cisco Unified CallManager database. Some methods require
entering the media access control (MAC) address of the phone. Tab le 3-1 provides
an overview of these methods.
Table 3-1 Methods for Adding Phones to the Cisco Unified CallManager
Database
Requires MAC
Method
Using auto-registration No Results in automatic
Using auto-registration with
the Tool for Auto-Registered
Phones Support (TAPS)
Using Bulk Administration
Tool (BAT)
Using the Cisco
Unified CallManager
Administration only
Address? Notes
assignment of directory
numbers
No Requires auto-registration and
BAT; updates information in
the Cisco Unified IP Phone
and in Cisco
Unified CallManager
Administration
Yes Allows for simultaneous
registration of multiple phones
Yes Requires phones to be added
individually
The following sections describe these methods:
• Adding Phones with Auto-Registration, page 3-4
• Adding Phones with Auto-Registration and TAPS, page 3-4
• Adding Phones with BAT, page 3-5
• Adding Phones with Cisco Unified CallManager Administration, page 3-6
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Adding Phones with Auto-Registration
You can use auto-registration to quickly enter phones into the Cisco
Unified CallManager database without first gathering MAC addresses from the
phones.
When auto-registration is enabled, Cisco Unified CallManager automatically
assigns the next available sequential directory number to new phones as they
register with Cisco Unified CallManager during the initial phone startup process.
After registering phones with Cisco Unified CallManager, you can modify
settings, such as the directory numbers and device pools, by using
Cisco Unified CallManager Administration.
Auto-registration is disabled by default in Cisco Unified CallManager. You must
enable and properly configure auto-registration before connecting any
Cisco Unified IP Phone to the network. For information about enabling and
configuring auto-registration, refer to Cisco Unified CallManager Administration
Guide.
Related Topics
• Adding Phones with Auto-Registration and TAPS, page 3-4
• Adding Phones with BAT, page 3-5
• Adding Phones with Cisco Unified CallManager Administration, page 3-6
Chapter 3 Setting Up the Cisco Unified Wireless IP Phone 7921G
Adding Phones with Auto-Registration and TAPS
You can add a group of phones quickly by using auto-registration and TAPS. First,
use the Bulk Administration Tool (BAT) to add phones to the
Cisco Unified CallManager database with dummy MAC addresses. Then use
TAPS to update MAC addresses and download pre-defined configurations for the
phones.
To implement TAPS, you or the end-users dial a TAPS directory number and
follow voice prompts. When the process is complete, the phone has downloaded
its directory number and other settings. The correct MAC address for the phone
is updated in Cisco Unified CallManager Administration.
You must enable auto-registration in Cisco Unified CallManager Administration
for TAPS to function.
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Refer to Bulk Administration Tool User Guide for Cisco Unified CallManager for
detailed instructions about BAT and about TAPS.
Related Topics
• Adding Phones with Auto-Registration, page 3-4
• Adding Phones with Cisco Unified CallManager Administration, page 3-6
• Adding Phones with BAT, page 3-5
Adding Phones with BAT
To add a group of phones to the Cisco Unified CallManager database, you can use
BAT. This plug-in application for Cisco Unified CallManager enables you to
perform batch operations, including registration, on multiple phones.
To add phones using BAT only (not in conjunction with TAPS), you first must
obtain the appropriate MAC address for each phone.
Determining the MAC Address of a Cisco Unified IP Phone
Before You Begin
When adding phones to the Cisco Unified CallManager database using
Cisco Unified CallManager Administration or using BAT, you must enter the
media access control (MAC) address of the phone. Tab le 3-2 describes how to
determine the MAC address of the wireless IP phone.
Table 3-2 Determining the MAC Address of the Phone
Method For More Information
Choose Settings > Model
Information > MAC Address and
See “Viewing Model Information”
section on page 7-10
look at the MAC Address field.
Remove the battery and look on the
back of the phone.
See the “Installing or Removing the
Phone Battery” section on page 3-11
For detailed instructions about using BAT, refer to Cisco Unified CallManager
Administration Guide and to Bulk Administration Tool Guide for Cisco
Unified CallManager.
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Before You Begin
Note When using BAT to add Cisco Unified Wireless IP Phones, use the default setting
for the phone load. The phone load name includes symbols (-, _,.) and BAT does
not permit symbols in an entry.
Related Topics
• Adding Phones with Auto-Registration, page 3-4
• Adding Phones with Auto-Registration and TAPS, page 3-4
• Adding Phones with Cisco Unified CallManager Administration, page 3-6
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 must obtain
the MAC address for each phone. See the “Methods for Adding Phones to Cisco
Unified CallManager” section on page 3-3 for instructions.
After you have collected MAC addresses, choose Device > Add a New Device in
Cisco Unified CallManager Administration to begin.
For additional 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 Auto-Registration, page 3-4
• Adding Phones with Auto-Registration and TAPS, page 3-4
• Adding Phones with BAT, page 3-5
Safety Information
Review the following warnings before installing the Cisco Unified IP Phone. To
see translations of these warnings, refer to the Regulatory Compliance and Safety
Information for the Cisco Unified Wireless IP Phone 7921G and Peripheral
Devices document that accompanied this device.
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Before You Begin
Warning
Warning
Warning
Warning
This warning symbol means danger. You are in a situation that could cause
bodily injury. Before you work on any equipment, be aware of the hazards
involved with electrical circuitry and be familiar with standard practices for
preventing accidents. Use the statement number provided at the end of each
warning to locate its translation in the translated safety warnings that
accompanied this device.
Statement 1071
Read the installation instructions before connecting the system to the power
source.
Statement 1004
This equipment will not be able to access emergency services during a power
outage because of reliance on utility power for normal operation. Alternative
arrangements should be made for access to emergency services. Access to
emergency services can be affected by any call-barring function of this
equipment.
Do not use the Cisco Unified Wireless IP Phone 7921G in hazardous
environments such as areas where high levels of explosive gas may be present.
Check with the site safety engineer before using any type of wireless device in
such an environment.
Warning
Warning
The plug-socket combination for the battery charger must be accessible at all
times, because it serves as the main disconnecting device.
Statement 1019
The battery charger requires short-circuit (overcurrent) protection to be
provided as part of the building installation. Install only in accordance with
national and local wiring regulations.
Warning
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The power supply must be placed indoors.
Statement 1045
Statement 331
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Chapter 3 Setting Up the Cisco Unified Wireless IP Phone 7921G
Warning
Ultimate disposal of this product should be handled according to all national
laws and regulations.
Warning
Telephone receivers produce a magnetic field that can attract small magnetic
objects such as pins and staples. To avoid the possibility of injury, do not place
the handset where such objects may be picked up.
Battery Safety Notices
These battery safety notices apply to the batteries that are approved by the
Cisco Unified Wireless IP Phone 7921G manufacturer.
Warning
Warning
There is the danger of explosion if the battery is replaced incorrectly. Replace
the battery only with the same or equivalent type recommended by the
manufacturer. Dispose of used batteries according to the manufacturer’s
instructions.
Do not dispose of the battery pack in fire or water. The battery may explode if
placed in a fire.
Statement 1040
Statement 1015
3-8
Caution The battery pack is intended for use only with this device.
Caution Do not disassemble, crush, puncture, or incinerate the battery pack.
Caution To avoid risk of fire, burns, or damage to your battery pack, do not allow a metal
object to touch the battery contacts.
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Caution Handle a damaged or leaking battery with extreme care. If you come in contact
with the electrolyte, wash the exposed area with soap and water. If the electrolyte
has come in contact the eye, flush the eye with water for 15 minutes and seek
medical attention.
Caution Do not charge the battery pack if the ambient temperature exceeds 104 degrees
Fahrenheit (40 degrees Celsius).
Caution Do not expose the battery pack to high storage temperatures (above 140 degrees
Fahrenheit, 60 degrees Celsius).
Caution When discarding a battery pack, contact your local waste disposal provider
regarding local restrictions on the disposal or recycling of batteries.
Before You Begin
Caution Use only a battery that has a Cisco part number:
Standard battery
—CP-BATT-7921G-STD
Extended battery—CP-BATT-7921G-EXT
Caution Use only a power supply for your geographical region with one of the following Cisco
part numbers:
Australia—CP-PWR-7921G-AU
Central Europe
—CP-PWR-7921G-CE
China—CP-PWR-7921G-CN
Japan—CP-PWR-7921G-JP
North America
—CP-PWR-7921G-NA
United Kingdom—CP-PWR-7921G-UK
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Installing the Cisco Unified Wireless IP Phone 7921G
Note The battery and power supply are not included with your phone. To order the
battery and power supply, see your local dealer.
Related Topics
• Network Requirements, page 3-1
• Providing Power to the Phone, page 3-10
Installing the Cisco Unified Wireless
IP Phone 7921G
After setting up the wireless network to support voice communications and
configuring the wireless IP phones in Cisco Unified CallManager, you are ready
to install the phones. This section includes the following installation information:
• Providing Power to the Phone, page 3-10
• Configuring Wireless LAN Settings for the Cisco Unified Wireless IP Phone
7921G, page 3-20
• Using a Headset, page 3-21
Providing Power to the Phone
The Cisco Unified Wireless IP Phone 7921G uses a battery for power. Ta bl e 3 -3
lists the types of batteries available for the wireless IP phone and the maximum
talk and standby times.
Table 3-3 Batteries Available for the Cisco Unified Wireless IP Phone
7921G
Type Technology Talk Time Standby Time
Standard Lithium ion Up to 10 hr Up to 80 hr
Extended Lithium ion Up to 12 hr Up to 100 hr
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Table 3 -4 shows the charging time for the two types of batteries. You can stop
charging the battery when the battery is fully charged, and leave the batteries in
the charger with no ill effects. Lithium ion batteries can be partially charged
without shortening the battery life. Batteries should handle up to 4000 recharges.
Table 3-4 Battery Charging Time Information
Installing the Cisco Unified Wireless IP Phone 7921G
Power Supply
Battery Type
Connected to Phone
Standard 2 hours 5 hours 2 hours
Extended 3 hours 7 hours 3 hours
The following sections provide information about the battery and charging the
phone:
• Installing or Removing the Phone Battery, page 3-11
• Using the Power Supply to Charge the Phone, page 3-12
• Using the USB Cable to Charge the Phone, page 3-15
• Installing and Using the Desktop Charger, page 3-17
Installing or Removing the Phone Battery
To install the battery in the Cisco Unified Wireless IP Phone use Figure 3-1, and
follow these steps:
Procedure
Step 1 To install the battery, insert the battery catches (as shown in Figure 3-1) in the
corresponding slots at the bottom of the Cisco Unified Wireless IP Phone 7921G.
Make sure that the metal contacts on the battery and the phone are facing each
other.
Step 2 Press the battery to the body of the phone until it locks into place.
Phone Connected to
PC with USB Cable
Power Supply with
Desktop Charger
Step 3 To remove the battery, press up on the locking catch, then lift and remove the
battery.
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Figure 3-1 Cisco Unified Wireless IP Phone 7921G Battery Installation
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Chapter 3 Setting Up the Cisco Unified Wireless IP Phone 7921G
3
222
180349
1 Locking catch 3 Metal contacts
2 Battery catches
Note The media access control (MAC) address for each Cisco Unified Wireless
IP Phone 7921G appears on a printed label on the back of the phone underneath
the battery.
Using the Power Supply to Charge the Phone
To charge the battery in your phone quickly, you can use the power supply. You
must assemble the appropriate AC adapter plug and then connect the power
supply.
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Assembling or Removing the AC Plug Adapter
To assemble or remove the AC plug adapter for the power supply, use Figure 3-2,
and follow these steps:
Procedure
Step 1 Insert AC plug adapter (as shown in Figure 3-2) in slot on the power supply.
Step 2 Push AC plug adapter securely into place.
Step 3 To remove AC plug adapter, press on locking button.
Step 4 Pull AC plug adapter out of slot on power supply.
Figure 3-2 Assembling and Removing the AC Plug Adapter
Installing the Cisco Unified Wireless IP Phone 7921G
1
2
4
3
1 AC plug adapter 3 Battery release button
2 Power supply 4 AC plug adapter removal
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Charging the Phone Using the Power Supply
After assembling the power supply, you are ready to charge your Cisco Unified
Wireless IP Phone 7921G. You can use the phone while the battery is being
charged. For charging times, see Tab le 3-5 .
To charge the Lithium ion battery using the power supply, follow these steps:
Procedure
Step 1 Connect the cable from the power supply to the outlet in the phone as shown in
Figure 3-3.
Step 2 Connect the power supply to an AC outlet.
Step 3 Monitor the indicator light. While the battery is charging the light is red, and turns
green when the battery is fully charged.
Step 4 When the battery is charged, you can disconnect the power supply from the phone,
and unplug the power cord from the AC outlet.
Chapter 3 Setting Up the Cisco Unified Wireless IP Phone 7921G
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Figure 3-3 Charging the Phone Using the Power Supply
Installing the Cisco Unified Wireless IP Phone 7921G
1 AC plug adapter
2 AC power supply
3 Phone connector on AC power supply cable
4 Indicator light (LED)
Using the USB Cable to Charge the Phone
You can charge the phone by using a USB cable connected to a USB port on you
PC. Charging times are longer when you use the USB cable. See Tabl e 3 -4 for
charging times.
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Figure 3-4 Charging the Phone Using a USB Cable Connected to a PC
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Chapter 3 Setting Up the Cisco Unified Wireless IP Phone 7921G
3
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3-16
180350
1 Phone connection—Insert into slot at bottom of phone.
2 USB connector—Insert into USB port on PC.
3 Indicator LED—Indicates the charging status.
Note When you plug the phone into the USB port, the Found New Hardware
Wizard appears. Use the following steps to avoid this pop-up window
every time you use the USB cable with your phone.
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To turn off the Found New Hardware Wizard when using the USB cable to charge
the phone, follow these steps:
Procedure
Step 1 Plug the USB cable into the Cisco Unified Wireless IP Phone 7921G.
Step 2 Plug the USB connector into the USB port on your PC.
The Found New Hardware Wizard dialog opens.
Step 3 To turn off the wizard, for Update New Software, click No, not this time.
Step 4 Next, click the button next to Install the Software automatically
(Recommended).
Step 5 After a time delay, the Cannot Install This Hardware dialog box appears. Click
Don't prompt me again to install this software.
Step 6 Click Finish to close the dialog box.
The phone briefly displays “USB Connected” on the status line.
While the battery is charging, the indicator light is red.
Step 7 When the battery is fully charged, the indicator light turns green. You can
disconnect the USB cable from the phone, and unplug the cable from the PC.
Installing the Cisco Unified Wireless IP Phone 7921G
Installing and Using the Desktop Charger
The desktop charger can charge both the phone battery installed in the phone and
a spare battery at the same time.You can place the phone in the desktop charger to
use the speakerphone capability while charging the phone and battery. For
information about using the desktop charger speakerphone, refer to the “Using a
Handset, Headset, and Speakerphone” in the Cisco Unified Wireless IP Phone
7921G Guide.
To identify the desktop charger components and how to set up the desktop charger,
use Figure 3-5.
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Installing the Cisco Unified Wireless IP Phone 7921G
Figure 3-5 Desktop Charger Assembly and Components
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1 Power connector—Plugs into the back of the
6 Speaker—For speakerphone mode
charger
2 AC power supply—Plugs into wall outlet 7 Microphone—Single-direction, internal
microphone for speakerphone mode
3 Upper compartment—For charging the phone 8 Lock hole—For inserting a cable lock
4 Battery LED indicator—Red light indicates
battery is charging; green light indicates
9 USB connector—For B-type USB connector on
cable that connects the phone to a computer
battery is fully charged
5 Power LED indicator—Green light indicates
10 Lower slot—For charging the battery
desktop charger has power
Using the Desktop Charger to Charge the Phone
To use the desktop charger to charge the phone and spare battery, follow these
steps:
Procedure
Step 1 Plug the AC adapter into an AC outlet, and insert the connector into the back of
the desktop charger.
Step 2 Insert the Cisco Unified Wireless IP Phone 7921G into the upper compartment of
the charger.
Step 3 Insert the spare battery into the lower compartment.
Note You can insert and charge both the phone and the spare battery at the same
time or you can charge them separately.
Step 4 Check the LED indicator on the phone for charging status. The battery LED on
the desktop charger provides charging status for the spare battery.
Table 3 -5 gives the battery charging time information.
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Battery Charging Times Using the Desktop Charger
The LED indicator on the phone turns green and the phone beeps when the phone
battery is charged. The battery LED indicator on the desktop charger turns green
when the spare battery is charged. Batteries will stop charging after they are fully
charged. You can leave the phone or battery in the charger for extended periods of
time with no problems.
Table 3 -5 lists the approximate battery charging times when using the desktop
charger.
Table 3-5 Battery Charging Times and Configurations for the Desktop
Charger
Battery Charging Configuration Approximate Charging Times
Spare battery alone 2 hours
Phone with battery 2 hours
Phone with battery and spare battery 2-3 hours
Related Topics
• Powering On the Cisco Unified Wireless IP Phone 7921G, page 3-23
• Installing or Removing the Phone Battery, page 3-11
• Using the Power Supply to Charge the Phone, page 3-12
Configuring Wireless LAN Settings for the Cisco Unified Wireless IP Phone 7921G
Before the phone can connect to the WLAN, you must configure the network
profile for the phone with the WLAN settings. You can use two methods for
setting up the network profiles:
• Cisco Unified Wireless IP Phone 7921G Web Pages, page 3-21
• Network Profile Menu on the Cisco Unified Wireless IP Phone 7921G,
page 3-21
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Cisco Unified Wireless IP Phone 7921G Web Pages
You can access the Cisco Unified Wireless IP Phone 7921G web pages to set up
the WLAN settings in the network profile. For a new phone with the factory
default settings, you must use the USB cable to connect the phone to your PC. For
more information and instructions, see Chapter 4, “Using the Cisco Unified
Wireless IP Phone 7921G Web Pages.”
Network Profile Menu on the Cisco Unified Wireless IP Phone 7921G
You can use the Settings menu on the phone and access the Network Profiles menu
to set up the network configuration and the WLAN configuration. For more
information and instructions, see Chapter 5, “Configuring Settings on the
Cisco Unified Wireless IP Phone 7921G.”
Using a Headset
Although Cisco Systems performs some internal testing of third-party headsets
for use with the Cisco Unified IP Phones, Cisco does not certify or support
products from headset or handset vendors. Because of the inherent environmental
and hardware inconsistencies in the locations where Cisco Unified IP Phones are
deployed, there is not a single “best” solution that is optimal for all environments.
Cisco recommends that customers test the headsets that work best in their
environment before deploying a large number of units in their network.
In some instances, the mechanics or electronics of various headsets can cause
remote parties to hear an echo of their own voice when they speak to Cisco
Unified IP Phone users.
Cisco Systems recommends the use of good quality external devices, like headsets
that are screened against unwanted radio frequency (RF) and audio frequency
(AF) signals. Depending on the quality of these devices and their proximity to
other devices such as cell phones and two-way radios, some audio noise may still
occur. See the “Using External Devices with Your Cisco Unified IP Phone”
section on page 3-22 for more information.
The primary reason that support of a headset would be inappropriate for an
installation is the potential for an audible hum. This hum can either be heard by
the remote party or by both the remote party and the Cisco Unified IP Phone user.
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Some potential humming or buzzing sounds can be caused by a range of outside
sources, for example, electric lights, being near electric motors, large PC
monitors. See the “Safety Information” section on page 3-6 for more information.
Audio Quality Subjective to the User
Beyond the physical, mechanical and technical performance, the audio portion of
a headset must sound good to the user and the party on the far end. Sound is
subjective and Cisco cannot guarantee the performance of any headsets or
handsets, but some of the headsets and handsets on the sites listed below have
been reported to perform well on Cisco Unified IP Phones.
Nevertheless, it is ultimately still the customer’s responsibility to test this
equipment in their own environment to determine suitable performance. For
information about headsets, see:
http://www.plantronics.com
http://www.jabra.com
Connecting a Headset
Chapter 3 Setting Up the Cisco Unified Wireless IP Phone 7921G
To connect a headset to the Cisco Unified Wireless IP Phone 7921G, plug it into
the headset port on the right side of the phone.
You can use the headset with all of the features on the Cisco Unified Wireless
IP Phone 7921G, including the Volume and Mute buttons. Use these buttons to
adjust the ear piece volume and to mute the speech path from the headset
microphone.
Using External Devices with Your Cisco Unified IP Phone
The following information applies when you use external devices with the
Cisco Unified IP Phone:
Cisco recommends the use of good quality external devices (speakers,
microphones, and headsets) that are shielded (screened) against unwanted radio
frequency (RF) and audio frequency (AF) signals.
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Depending on the quality of these devices and their proximity to other devices
such as mobile phones or two-way radios, some audio noise may still occur. In
these cases, Cisco recommends that you take one or more of the following actions:
• Move the external device away from the source of the RF or AF signals.
• Route the external device cables away from the source of the RF or AF
signals.
• Use shielded cables for the external device, or use cables with a better shield
and connector.
• Shorten the length of the external device cable.
• Apply ferrites or other such devices on the cables for the external device.
Cisco cannot guarantee the performance of the system because Cisco has no
control over the quality of external devices, cables, and connectors. The system
will perform adequately when suitable devices are attached using good quality
cables and connectors.
Caution In European Union countries, use only external speakers, microphones, and
headsets that are fully compliant with the EMC Directive [89/336/EC].
Powering On the Cisco Unified Wireless IP Phone 7921G
Powering On the Cisco Unified Wireless IP Phone
7921G
After charging the battery and configuring the wireless IP phone, you are ready to
power on the phone and connect to the WLAN. Use the following sections for
more information about starting up the phone:
• Active and Standby Phone Modes, page 3-25
• Understanding the Phone Startup Process, page 3-26
To power on the Cisco Unified Wireless IP Phone 7921G, press and hold the
Power On button until the phone begins its startup process by cycling through
these steps:
1. The phone displays the Cisco Systems screen.
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2. The phone screen displays these messages as the phone starts up:
• Locating Network Services
• Configuring IP
• Network Up
• Configuring CMList
• Registering
3. The following information displays on the main phone screen:
• Current time and date
• Primary directory number
• Main screen icons for four menus and Help
• “Your current options” on status line
• Softkey labels (Messages and Options)
When the phone passes through these stages with no errors, the phone started up
properly. Now the phone is in standby mode and is ready to place or receive calls.
The signal icon in the upper left corner shows the strength of the signal between
the wireless access point and the phone. The phone must have an adequate signal
to successfully place or receive calls. If the signal icon displays only one bar, the
weak signal can cause problems with phone performance.
Chapter 3 Setting Up the Cisco Unified Wireless IP Phone 7921G
3-24
Note The status message, “Leaving Service Area” indicates that the phone is not
receiving a strong signal.
If the phone does not complete these steps successfully, see the “Resolving
Startup and Connectivity Problems” section on page 9-1.
Related Topics
• Active and Standby Phone Modes, page 3-25
• Understanding the Phone Startup Process, page 3-26
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Active and Standby Phone Modes
When the Cisco Unified Wireless IP Phone 7921G is powered on, it can be in one
of these two modes:
• Active mode
• Standby mode
Active mode
The phone is in active mode when there is an active RTP stream. When the phone
is performing one of these actions, it is consuming power:
• Connected to an active call
• Scanning for channels
• Sending CDP packets
• Sending keep-alive messages
• Reregistering with Cisco Unified CallManager
The standard battery provides up to 10 hours of talk time in active mode and the
extended battery provides up to 12 hours of talk time.
Powering On the Cisco Unified Wireless IP Phone 7921G
Standby mode
The phone goes into standby mode two seconds after a scan is complete.
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The phone will awake from standby mode in response to these events:
• Pressing keys on the keypad
• Roaming between APs
• Power cycling the phone
• Losing network connectivity
• Losing RF connectivity
• Transmitting scheduled CDP or keep-alive packets.
The standard battery provides up to 80 hours of standby time and the extended
battery provides up to 100 hours of standby time.
Related Topics
• Understanding the Phone Startup Process, page 3-26
• Resolving Startup and Connectivity Problems, page 9-1
Chapter 3 Setting Up the Cisco Unified Wireless IP Phone 7921G
Understanding the Phone Startup Process
When connecting to the wireless VoIP network, the Cisco Unified Wireless
IP Phone 7921G goes through a standard startup process, as described in
Table 3 -6. Depending on your specific network configuration, not all of these
steps may occur on your unified IP phone.
Table 3-6 Cisco Unified Wireless IP Phone Startup Process
Step Description Related Topics
1. Powering on the
phone
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The Cisco Unified Wireless IP Phone 7921G
has non-volatile Flash 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.
Providing Power to the
Phone, page 3-10
Resolving Startup and
Connectivity Problems,
page 9-1
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Understanding the Phone Startup Process
Table 3-6 Cisco Unified Wireless IP Phone Startup Process (continued)
Step Description Related Topics
2. Scanning for an
access point
3. Authenticating with
access point
The Cisco Unified Wireless IP Phone 7921G
scans the RF coverage area with its radio. The
phone searches its network profiles and scans
for access points that have a matching SSID and
authentication type. The phone associates with
the access point with the highest RSSI that
matches with its network profile.
The Cisco Unified Wireless IP Phone 7921G
begins the authenticating process.
• If set for Open, then any device can
authenticate to the access point. For added
security, static WEP encryption might
optionally be used.
• If set to Shared Key, the phone encrypts the
challenge text using the WEP key and the
access point must verify that the WEP key
was used to encrypt the challenge text
before network access is available.
• If set for LEAP or EAP-FAST, then the
user name and password are authenticated
by the RADIUS server before network
access is available.
Interacting with Cisco
Unified Wireless Access
Points, page 2-12
Resolving Startup and
Connectivity Problems,
page 9-1
Authentication
Mechanisms in the
Wireless Network,
page 2-19
• If set for Auto (AKM), the phone looks for
an access point with one of the following
key management options enabled:
–
WPA, WPA2, or CCKM—The
username and password are
authenticated by the RADIUS server
before network access is available.
–
WPA-Pre-shared key,
WPA2-Pre-shared key—The phone
authenticates with the access point
using the pre-shared key.
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Understanding the Phone Startup Process
Table 3-6 Cisco Unified Wireless IP Phone Startup Process (continued)
Step Description Related Topics
4. Configuring IP
network
5. Downloading Load IDThe unified IP phone checks to verify that the
6. Downloading config
file
If the unified IP phone is using DHCP to obtain
an IP address, the phone queries the DHCP
server to obtain one. If you are not using DHCP
in your network, you must assign a static IP
address to each phone locally.
In addition to assigning an IP address, the
DHCP server directs the unified IP phone to a
TFTP server. If the phone has a statically
defined IP address, you must configure the
TFTP server IP address locally on the phone; the
phone then contacts the TFTP server directly.
proper firmware is installed or if new firmware
is available to download.
Cisco Unified CallManager informs devices
using.cnf or .cnf.xml format configuration files
of their load ID. Devices using .xml format
configuration files receive the load ID in the
configuration file.
The TFTP server has configuration files and
profile files. A configuration file includes
parameters for connecting to Cisco
Unified CallManager and information about
which image load a phone should be running. A
profile file contains various parameters and
values for phone and network settings.
• Configuring DHCP
Settings, page 5-8
• Disabling DHCP,
page 5-8
• Resolving Startup and
Connectivity
Problems, page 9-1
• Phone Configuration
Files and Profile
Files, page 2-25
• Configuring an
Alternate TFTP
Server, page 5-10
• Phone Configuration
Files and Profile
Files, page 2-25
• Resolving Startup and
Connectivity
Problems, page 9-1
3-28
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Understanding the Phone Startup Process
Table 3-6 Cisco Unified Wireless IP Phone Startup Process (continued)
Step Description Related Topics
7. Connecting to Cisco
Unified
CallManager
8. Registering to Cisco
Unified
CallManager
The configuration file defines how the Cisco
Unified IP Phone communicates with Cisco
Unified CallManager. After obtaining the file
from the TFTP server, the phone attempts to
make a TCP connection to the highest priority
Cisco Unified CallManager on the list.
If the phone was manually added to the
database, Cisco Unified CallManager identifies
and registers 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.
• Interacting with Cisco
Unified CallManager,
page 2-24
• Resolving Startup and
Connectivity
Problems, page 9-1
• Configuring the Cisco
Unified Wireless IP
Phone 7921G in
Cisco Unified
CallManager,
page 1-17
• Adding Users to
Cisco
Unified CallManager,
page 6-22
Related Topics
• Configuring Cisco Unified Wireless IP Phones in Cisco
Unified CallManager, page 6-2
• Phone Configuration Files and Profile Files, page 2-25
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