Cisco UNIFIED 9971 Quick reference guide

Cisco Unified IP Phone 9971
Wireless LAN Deployment Guide
The Cisco Unified IP Phone 9971 is adaptable for professionals that require the ability to unplug the wired network connection
and remain connected. The Wireless LAN and Bluetooth 2.1 + EDR capabilities enable mobility and cord-free
communications. The Cisco Unified IP Phone 9971 supports both the headset and hands-free profiles.
This guide provides information and guidance to help the network administrator deploy these phones in a wireless LAN
environment.

Cisco Unified IP Phone 9971 Wireless LAN Deployment Guide
2
Revision History
Date
Comments
11/17/09
9.0(1) Release
05/03/10
9.0(2) Release
12/15/10
9.1(1) Release
05/24/13
9.3(2) Release
08/20/13
9.3(4) Release
04/19/14
9.4(1) Release
07/16/14
9.4(1)SR1 Release

Cisco Unified IP Phone 9971 Wireless LAN Deployment Guide
3
Contents
Cisco Unified IP Phone 9971 Overview ...................................................................................................................................................6!
Requirements .............................................................................................................................................................................................6!
Site Survey ...............................................................................................................................................................................................6!
RF Validation ..........................................................................................................................................................................................6!
Call Control.............................................................................................................................................................................................8!
Protocols..................................................................................................................................................................................................8!
Access Points ...........................................................................................................................................................................................9!
Antennas ................................................................................................................................................................................................11!
Models.......................................................................................................................................................................................................11!
World Mode (802.11d) ..........................................................................................................................................................................12!
Radio Characteristics............................................................................................................................................................................13!
Language Support .................................................................................................................................................................................14!
Bluetooth...................................................................................................................................................................................................14!
Bluetooth Profiles..................................................................................................................................................................................15!
Coexistence (802.11b/g + Bluetooth)....................................................................................................................................................15!
Video Calls................................................................................................................................................................................................16!
Security .....................................................................................................................................................................................................17!
Extensible Authentication Protocol - Flexible Authentication via Secure Tunneling (EAP-FAST) .....................................................17!
Fast Secure Roaming (FSR) ..................................................................................................................................................................19!
EAP and User Database Compatibility.................................................................................................................................................19!
Power Management.................................................................................................................................................................................20!
Delivery Traffic Indicator Message (DTIM) .........................................................................................................................................20!
Quality of Service (QoS)..........................................................................................................................................................................20!
Configuring QoS in Cisco Unified Communications Manager.............................................................................................................21!
Configuring QoS Policies for the Network............................................................................................................................................21!
Configuring Cisco Switch Ports........................................................................................................................................................21!
Configuring Cisco IOS Access Points ..............................................................................................................................................22!
Configuring Switch Ports for Wired IP Phones ................................................................................................................................22!
Sample Voice Packet Capture ...........................................................................................................................................................23!
Call Admission Control .........................................................................................................................................................................23!
Pre-Call Admission Control ..............................................................................................................................................................24!
Roaming Admission Control.............................................................................................................................................................24!
Traffic Classification (TCLAS)..............................................................................................................................................................24!
Roaming....................................................................................................................................................................................................25!
Interband Roaming................................................................................................................................................................................26!
Multicast ...................................................................................................................................................................................................26!

Cisco Unified IP Phone 9971 Wireless LAN Deployment Guide
4
Designing the Wireless LAN...................................................................................................................................................................26!
Planning Channel Usage.......................................................................................................................................................................26!
5 GHz (802.11a)................................................................................................................................................................................26!
Using Dynamic Frequency Selection (DFS) on Access Points ....................................................................................................27!
2.4 GHz (802.11b/g)..........................................................................................................................................................................28!
Signal Strength and Coverage...........................................................................................................................................................29!
Configuring Data Rates.........................................................................................................................................................................32!
Call Capacity.........................................................................................................................................................................................33!
Video Calls........................................................................................................................................................................................33!
Dynamic Transmit Power Control (DTPC) ..........................................................................................................................................34!
Rugged Environments............................................................................................................................................................................34!
Multipath ...........................................................................................................................................................................................35!
Verification with Site Survey Tools .......................................................................................................................................................36!
Cisco 9971 Site Survey .....................................................................................................................................................................37!
Configuring Cisco Unified Communications Manager........................................................................................................................39!
Phone Button Templates........................................................................................................................................................................39!
Security Profiles ....................................................................................................................................................................................40!
G.722 and iSAC Advertisement .............................................................................................................................................................41!
Common Settings ...................................................................................................................................................................................42!
Audio and Video Bit Rates.....................................................................................................................................................................42!
Configuring Video and Camera Capabilities........................................................................................................................................43!
Product Specific Configuration Options ...............................................................................................................................................44!
Configuring the Cisco Unified Wireless LAN Controller and Access Points ....................................................................................56!
SSID / WLAN Settings ...........................................................................................................................................................................57!
Controller Settings.................................................................................................................................................................................62!
802.11 Network Settings........................................................................................................................................................................64!
Beamforming (ClientLink)................................................................................................................................................................65!
Auto RF (RRM) ................................................................................................................................................................................66!
Client Roaming .................................................................................................................................................................................68!
Call Admission Control.....................................................................................................................................................................68!
EDCA Parameters .............................................................................................................................................................................72!
DFS (802.11h)...................................................................................................................................................................................72!
CleanAir ............................................................................................................................................................................................73!
AP Groups .............................................................................................................................................................................................74!
RF Profiles.........................................................................................................................................................................................75!
FlexConnect Groups..............................................................................................................................................................................77!
Multicast Direct.....................................................................................................................................................................................77!
QoS Profiles...........................................................................................................................................................................................78!
QoS Basic Service Set (QBSS)...............................................................................................................................................................82!
CCKM Timestamp Tolerance ................................................................................................................................................................83!
Auto-Immune .........................................................................................................................................................................................84!
WLAN Controller Advanced EAP Settings............................................................................................................................................85!
Proxy ARP .............................................................................................................................................................................................86!
TKIP Countermeasure Holdoff Time.....................................................................................................................................................86!

Cisco Unified IP Phone 9971 Wireless LAN Deployment Guide
5
VLANs and Cisco Autonomous Access Points.......................................................................................................................................87!
Configuring the Cisco Unified IP Phone 9971 ......................................................................................................................................87!
Wireless LAN Settings ...........................................................................................................................................................................87!
Bluetooth Settings..................................................................................................................................................................................89!
Camera Settings for Video Calls ...........................................................................................................................................................91!
Upgrading Firmware.............................................................................................................................................................................92!
Troubleshooting .......................................................................................................................................................................................93!
Device Information................................................................................................................................................................................93!
Network Setup........................................................................................................................................................................................94!
Current Access Point.............................................................................................................................................................................95!
WLAN Statistics.....................................................................................................................................................................................97!
Streaming Statistics ...............................................................................................................................................................................97!
Device Logs ...........................................................................................................................................................................................98!
Traffic Stream Metrics (TSM) ...............................................................................................................................................................99!
WLAN Signal Indicator .......................................................................................................................................................................100!
WLAN Disconnect Display ..................................................................................................................................................................101!
Restoring Factory Defaults .................................................................................................................................................................101!
Capturing a Screenshot of the Phone Display ....................................................................................................................................101!
Healthcare Environments .....................................................................................................................................................................101!
Accessories..............................................................................................................................................................................................101!
Additional Documentation....................................................................................................................................................................103!

Cisco Unified IP Phone 9971 Wireless LAN Deployment Guide
6
Cisco Unified IP Phone 9971 Overview
The Cisco Unified IP Phone 9971 is the platform that provides communication within enterprises. The levels of voice quality
performance that have come to be expected from Cisco products are maintained in the Cisco Unified IP Phone 9971 with the
inclusion of Cisco Compatible eXtensions (CCX).
Cisco's implementation of 802.11, employing CCX, permits time sensitive applications such as voice to operate efficiently
across campus wide wireless LAN (WLAN) deployments. These extensions provide fast roaming capabilities and an almost
seamless flow of voice traffic, whilst maintaining security as the end user roams between access points.
It should be understood that WLAN uses unlicensed spectrum, and as a result it may experience interference from other devices
using the unlicensed spectrum. The proliferation of devices in the 2.4 GHz spectrum, such as Bluetooth headsets, Microwave
ovens, cordless consumer phones, means that the 2.4 GHz spectrum may contain more congestion than other spectrums. The 5
GHz spectrum has far fewer devices operating in this spectrum and is the preferred spectrum to operate the Cisco Unified IP
Phone 9971 in order to take advantage of the 802.11a data rates available. Despite the optimizations that Cisco have
implemented in the Cisco Unified IP Phone 9971, the use of unlicensed spectrum means that uninterrupted communication can
not be guaranteed, and there may be the possibility of voice or video gaps of up to several seconds during multimedia
conversations. Adherence to the deployment guidelines will reduce the likelihood of these voice and video gaps being present,
but there is always this possibility. Through the use of unlicensed spectrum, and the inability to guarantee the delivery of
messages to a WLAN device, the Cisco Unified IP Phone 9971 is not intended as a medical device and should not be used to
make clinical decisions.
Requirements
The Cisco Unified IP Phone 9971 is an IEEE 802.11a/b/g device that provides voice and video communications.
The wireless LAN must be validated to ensure it meets the requirements to deploy the Cisco Unified IP Phone 9971.
Site Survey
Before deploying the Cisco Unified IP Phone 9971 into a production environment, a site survey must be completed by a Cisco
certified partner with the advanced wireless LAN specialization. During the site survey the RF spectrum can be analyzed to
determine which channels are usable in the desired band (2.4 GHz or 5 GHz). Typically there is less interference in the 5 GHz
band as well as more non-overlapping channels, so 5 GHz is the preferred band for operation and even more highly
recommended when the Cisco Unified IP Phone 9971 is to be used in a mission critical environment. The site survey will
include heatmaps showing the intended coverage plan for the location. The site survey will also determine which access point
platform type, antenna type, access point configuration (channel and transmit power) to use at the location. It is recommended
to select an access point with integrated antennas for non-rugged environments (e.g. office, healthcare, education, hospitality)
and an access point platform requiring external antennas for rugged environments (e.g. manufacturing, warehouse, retail).
See the Designing the Wireless LAN for Voice section for more information.
Refer to the Steps to Success website for additional information.
http://www.cisco.com/go/stepstosuccess
RF Validation
In order to determine if VoWLAN can be deployed, the environment must be evaluated to ensure the following items meet
Cisco guidelines.
Signal
The cell edge should be designed to -67 dBm where there is a 20-30% overlap of adjacent access points at that signal
level.

Cisco Unified IP Phone 9971 Wireless LAN Deployment Guide
7
This ensures that the Cisco Unified IP Phone 9971 always has adequate signal and can hold a signal long enough in
order to roam seamlessly where signal based triggers are utilized vs. packet loss triggers.
Also need to ensure that the upstream signal from the Cisco Unified IP Phone 9971 meets the access point’s receiver
sensitivity for the transmitted data rate. Rule of thumb is to ensure that the received signal at the access point is -67
dBm or higher.
It is recommended to design the cell size to ensure that the Cisco Unified IP Phone 9971 can hold a signal for at least 5
seconds.
Channel Utilization
Channel Utilization levels should be kept under 50%.
If using the Cisco Unified IP Phone 9971, this is provided via the QoS Basic Service Set (QBSS), which equates to
around 105.
The Cisco Unified IP Phone 9971 converts the 0-255 scale to a percentage, so 105 would equate to around 40% in the
Cisco Unified IP Phone 9971 current access point menu.
Noise
Noise levels should not exceed -92 dBm, which allows for a Signal to Noise Ratio (SNR) of 25 dB where a -67 dBm
signal should be maintained.
Also need to ensure that the upstream signal from the Cisco Unified IP Phone 9971 meets the access point’s signal to
noise ratio for the transmitted data rate.
Packet Loss / Delay
Per voice guidelines, packet loss should not exceed 1% packet loss; otherwise voice quality can be degraded
significantly.
Jitter should be kept at a minimal (< 100 ms).
Retries
802.11 retransmissions should be less than 20%.
Multipath
Multipath should be kept to a minimal as this can create nulls and reduce signal levels.
Many different tools and applications can be used to evaluate these items in order to certify the deployment.
•Cisco Prime Network Control System (NCS) for Unified Wireless LAN Management
http://www.cisco.com/en/US/prod/collateral/wireless/ps5755/ps11682/ps11686/ps11688/data_sheet_c78-650051.html
•Cisco Wireless Control System (WCS) for Unified Wireless LAN Management
http://www.cisco.com/en/US/prod/collateral/wireless/ps5755/ps6301/ps6305/product_data_sheet0900aecd802570d0.ht
ml
•Cisco Wireless LAN Solution Engine (WLSE) for Cisco Autonomous Wireless LAN Management
http://www.cisco.com/en/US/prod/collateral/netmgtsw/ps6380/ps6563/ps3915/ps6839/product_data_sheet0900aecd804
10b92.html
•Cisco Spectrum Expert
http://www.cisco.com/en/US/prod/collateral/wireless/ps9391/ps9393/product_data_sheet0900aecd807033c3.html
•Cisco Unified Operations Manager
http://www.cisco.com/en/US/prod/collateral/netmgtsw/ps6491/ps6705/ps6535/data_sheet_c78-636705.html

Cisco Unified IP Phone 9971 Wireless LAN Deployment Guide
8
•AirMagnet (Survey, WiFi Analyzer, VoFi Analyzer, Spectrum Analyzer)
http://www.airmagnet.com
Call Control
The Cisco Unified IP Phone 9971 utilizes Session Initiation Protocol (SIP) for call control with the following applications.
•Cisco Unified Communications Manager (CUCM)
Minimum = 7.1(3)
Recommended = 8.6 and later
•Cisco Unified Communications Manager Express (CUCME)
Minimum = 8.6
Recommended = 8.6 and later
•Cisco Unified Survivable Remote Site Telephony (SRST)
Minimum = 8.6
Recommended = 8.6 and later
Device Support in Cisco Unified Communications Manager
Cisco Unified Communications Manager requires a device package to be installed or service release update in order to enable
Cisco Unified IP Phone 9971 device support.
Device packages for Cisco Unified Communications Manager are available at the following location.
http://www.cisco.com/cisco/software/navigator.html?mdfid=278875240
Protocols
Supported voice and wireless LAN protocols include the following:
•CCX v4
•Wi-Fi MultiMedia (WMM)
•Traffic Specification (TSPEC)
•Traffic Classification (TCLAS)
•Session Initiation Protocol (SIP)
•Real Time Protocol (RTP)
•G.722, G.711, iLBC, G.729
•Real Time Control Protocol (RTCP)
•Cisco Discovery Protocol (CDP)

Cisco Unified IP Phone 9971 Wireless LAN Deployment Guide
9
Access Points
The Cisco Unified IP Phone 9971 is supported on both the Cisco Unified and Cisco Autonomous solutions.
Below is the supported version information for each Cisco solution.
•Cisco Unified Wireless LAN Controller
Minimum = 6.0.202.0 (7.0.116.0 and 7.0.230 are not supported)
Recommended = 7.0.250.0, 7.4.121.0, 7.6.120.0
•Cisco IOS Access Points (Autonomous)
Minimum = 12.4(21a)JY
Recommended = 12.4(25d)JA2, 15.2(4)JA1
The supported access point models are listed below.
Note: The Cisco Unified IP Phone 9971 is supported with the Cisco AP3600 when the internal 802.11abgn radio is utilized,
however if the 802.11ac module (AIR-RM3000AC) for the Cisco AP3600 is installed, then Cisco Unified Wireless LAN
Controller release 7.6.100.0 or later is required.

Cisco Unified IP Phone 9971 Wireless LAN Deployment Guide
10
The table below lists the modes that are supported by each Cisco Access Point.
Note: VoWLAN is not currently supported in conjunction with outdoor MESH technology (1500 series).
Limited support is provided when using 3rd party access points as there are no interoperability tests performed for 3rd party
access points.
However the user should have basic functionality when connected to a Wi-Fi compliant access point.
Cisco AP Series
802.11a
802.11b
802.11g
802.11n
802.11ac
Unified
Autonomous
500
No
Yes
Yes
No
No
Yes
Yes
600
Yes
Yes
Yes
Yes
No
Yes
No
700
Yes
Yes
Yes
Yes
No
Yes
No
1040
Yes
Yes
Yes
Yes
No
Yes
Yes
1100
No
Yes
Optional
No
No
Yes
Yes
1130 AG
Yes
Yes
Yes
No
No
Yes
Yes
1140
Yes
Yes
Yes
Yes
No
Yes
Yes
1200
Optional
Yes
Optional
No
No
Yes
Yes
1230 AG
Yes
Yes
Yes
No
No
Yes
Yes
1240 AG
Yes
Yes
Yes
No
No
Yes
Yes
1250
Yes
Yes
Yes
Yes
No
Yes
Yes
1260
Yes
Yes
Yes
Yes
No
Yes
Yes
1600
Yes
Yes
Yes
Yes
No
Yes
Yes
2600
Yes
Yes
Yes
Yes
No
Yes
Yes
3500
Yes
Yes
Yes
Yes
No
Yes
Yes
3600
Yes
Yes
Yes
Yes
Yes (with
AIR-
RM3000
AC
module)
Yes
Yes
3700
Yes
Yes
Yes
Yes
Yes
Yes
Yes
860
No
Yes
Yes
Yes
No
No
Yes
870
No
Yes
Yes
No
No
No
Yes
880
No
Yes
Yes
Yes
No
Yes
Yes
890
Yes
Yes
Yes
Yes
No
Yes
Yes
UC500
No
Yes
Yes
No
No
No
Yes

Cisco Unified IP Phone 9971 Wireless LAN Deployment Guide
11
Some of the key features are the following:
•5 GHz (802.11a/n)
•Wi-Fi Protected Access v2 (WPA2+AES)
•Wi-Fi Multimedia (WMM)
•Unscheduled Automatic Power Save Delivery (U-APSD)
•Traffic Specification (TSPEC)
•Traffic Classification (TCLAS)
•Differentiated Services Code Point (DSCP)
•Class of Service (CoS / 802.1p)
•QoS Basic Service Set (QBSS)
Cisco Unified IP Phone 9971 can take advantage of Cisco Client Extensions (CCX) enabled access points.
Some of the key features are the following:
•Cisco Centralized Key Management (CCKM)
•Dynamic Transmit Power Control (DTPC)
•Proxy ARP
http://www.cisco.com/web/partners/pr46/pr147/partners_pgm_concept_home.html
http://www.cisco.com/web/partners/pr46/pr147/program_additional_information_new_release_features.html
Antennas
Some of the Cisco Access Points require or allow external antennas.
Please refer to the following URL for the list of supported antennas and how these external antennas should be mounted.
http://www.cisco.com/en/US/prod/collateral/wireless/ps7183/ps469/product_data_sheet09186a008008883b.html
3rd party antennas are not supported, as there is no interoperability testing performed against 3rd party antennas including
Distributed Antenna Systems (DAS) and Leaky Coaxial Systems.
Please refer to the following URL for more info on Cisco Wireless LAN over Distributed Antenna Systems.
http://www.cisco.com/en/US/prod/collateral/wireless/ps5678/ps6973/positioning_statement_c07-565470.html
Note: The Cisco 1040, 1130, 1140, 1602i, 2602i, 3502i, 3602i, and 3702i Series Access Points are to be mounted on the ceiling
as they have omni-directional antennas and are not designed to be patches.
Models
There a few different Cisco Unified IP Phone 9971 models which the color (black or white) or handset type (standard and
slimline) can vary.
All models require an 802.11d enabled access point if planning to utilize Wi-Fi.
The following Cisco Unified IP Phone 9971 models are available.
Below outlines the modes, frequency ranges and channels supported by each model.

Cisco Unified IP Phone 9971 Wireless LAN Deployment Guide
12
Part Number
Description
Frequency
Ranges
Available
Channels
Channel Set
CP-9971-C-K9=
9971, Charcoal,
Standard Handset
2.412 - 2.484 GHz
5.180 - 5.240 GHz
5.260 - 5.320 GHz
5.500 - 5.700 GHz
5.745 - 5.805 GHz
14
4
4
11
4
1-14
36,40,44,48
52,56,60,64
100-140
149,153,157,161
CP-9971-CL-K9=
9971, Charcoal,
Slimline Handset
CP-9971-W-K9=
9971, White,
Standard Handset
CP-9971-wL-K9=
9971, White,
Slimline Handset
A power cube (CP-PWR-CUBE-4=) is required when utilizing the Cisco Unified IP Phone 9971 in Wi-Fi mode.
Note: Channels 120, 124, 128 are not supported in the Americas, Europe, or Japan, but may be in other regions around the
world.
802.11j (channels 34, 38, 42, 46) and channel 165 are not supported.
Channel 14 for Japan is not supported on the newer Cisco Access Points.
World Mode (802.11d)
World Mode allows a client to be used in different regions, where the client can adapt to using the channels and transmit powers
advertised by the access point in the local environment.
If using the Cisco Unified IP Phone 9971, then it is required to enable 802.11d. The Cisco Unified IP Phone 9971 uses 802.11d
to determine which channels and transmit powers to use and inherits its client configuration from the associated access point.
Enable World Mode (802.11d) for the corresponding country where the access point is located.
Some 5 GHz channels are also used by radar technology, which requires that the 802.11 client and access point be 802.11h
compliant if utilizing those radar frequencies (DFS channels). 802.11h requires 802.11d to be enabled.
The Cisco Unified IP Phone 9971 will passively scan DFS channels first before engaging in active scans of those channels.
If using 2.4 GHz (802.11b/g) and 802.11d is not enabled, then the Cisco Unified IP Phone 9971 can attempt to use channels 1-
11 and reduced transmit power.
Note: World Mode is enabled automatically for the Cisco Unified Wireless LAN Controller.
World Mode must be enabled manually for Cisco Autonomous Access Points using the following commands:
Interface dot11radio X
world-mode dot11d country US both
Supported Countries
Below are the countries and their 802.11d codes that are supported by the Cisco Unified IP Phone 9971.
Argentina (AR)
India (IN)
Poland (PL)

Cisco Unified IP Phone 9971 Wireless LAN Deployment Guide
13
Australia (AU)
Indonesia (ID)
Portugal (PT)
Austria (AT)
Ireland (IE)
Puerto Rico (PR)
Belgium (BE)
Israel (IL)
Romania (RO)
Brazil (BR)
Italy (IT)
Russian Federation (RU)
Bulgaria (BG)
Japan (JP)
Saudi Arabia (SA)
Canada (CA)
Korea (KR)
Singapore (SG)
Chile (CL)
Latvia (LV)
Slovakia (SK)
Colombia (CO)
Liechtenstein (LI)
Slovenia (SI)
Costa Rica (CR)
Lithuania (LT)
South Africa (ZA)
Cyprus (CY)
Luxembourg (LU)
Spain (ES)
Czech Republic (CZ)
Malaysia (MY)
Sweden (SE)
Denmark (DK)
Malta (MT)
Switzerland (CH)
Estonia (EE)
Mexico (MX)
Taiwan (TW)
Finland (FI)
Monaco (MC)
Thailand (TH)
France (FR)
Netherlands (NL)
Turkey (TR)
Germany (DE)
New Zealand (NZ)
Ukraine (UA)
Gibraltar (GI)
Norway (NO)
United Arab Emirates (AE)
Greece (GR)
Oman (OM)
United Kingdom (GB)
Hong Kong (HK)
Panama (PA)
United States (US)
Hungary (HU)
Peru (PE)
Venezuela (VE)
Iceland (IS)
Philippines (PH)
Vietnam (VN)
Note: Compliance information is available on the Cisco Product Approval Status web site at the following URL:
http://tools.cisco.com/cse/prdapp/jsp/externalsearch.do?action=externalsearch&page=EXTERNAL_SEARCH
Radio Characteristics
The following table lists the data rates, ranges, and receiver sensitivity info for Cisco Unified IP Phone 9971.
5 GHz - 802.11a
Data Rate
Modulation
Range
Receiver Sensitivity
Max Tx Power = 16 dBm
6 Mbps
OFDM - BPSK
604 ft (184 m)
-91 dBm
9 Mbps
OFDM - BPSK
604 ft (184 m)
-90 dBm
12 Mbps
OFDM - QPSK
551 ft (168 m)
-88 dBm
18 Mbps
OFDM - QPSK
545 ft (166 m)
-86 dBm
24 Mbps
OFDM - 16 QAM
512 ft (156 m)
-82 dBm
36 Mbps
OFDM - 16 QAM
420 ft (128 m)
-80 dBm
48 Mbps
OFDM - 64 QAM
322 ft (98 m)
-77 dBm
54 Mbps
OFDM - 64 QAM
289 ft (88 m)
-75 dBm
2.4 GHz - 802.11g
Data Rate
Modulation
Range
Receiver Sensitivity
Max Tx Power = 16 dBm
6 Mbps
OFDM - BPSK
709 ft (216 m)
-91 dBm
9 Mbps
OFDM - BPSK
650 ft (198 m)
-90 dBm
12 Mbps
OFDM - QPSK
623 ft (190 m)
-87 dBm
18 Mbps
OFDM - QPSK
623 ft (190 m)
-86 dBm

Cisco Unified IP Phone 9971 Wireless LAN Deployment Guide
14
24 Mbps
OFDM - 16 QAM
623 ft (190 m)
-82 dBm
36 Mbps
OFDM - 16 QAM
495 ft (151 m)
-80 dBm
48 Mbps
OFDM - 64 QAM
413 ft (126 m)
-77 dBm
54 Mbps
OFDM - 64 QAM
394 ft (120 m)
-76 dBm
2.4 GHz - 802.11b
Data Rate
Modulation
Range
Receiver Sensitivity
Max Tx Power = 17 dBm
1 Mbps
DSSS - BPSK
1,010 ft (308 m)
-96 dBm
2 Mbps
DSSS - QPSK
951 ft (290 m)
-85 dBm
5.5 Mbps
DSSS - CCK
919 ft (280 m)
-90 dBm
11 Mbps
DSSS - CCK
902 ft (275 m)
-87 dBm
Note: Receiver sensitivity is the minimum signal needed to decode a packet at a certain data rate.
The above values are pure radio specifications and do not account for the gain of the single integrated antenna.
See the Designing the Wireless LAN for Voice section for more information on signal requirements.
Language Support
The Cisco Unified IP Phone 9971 currently supports the following languages.
The corresponding locale package must be installed to enable support for that language. English is the default language on the
phone.
Download the locale packages from the Localization page at the following URL:
http://software.cisco.com/download/navigator.html?mdfid=278875240
Bluetooth
The Cisco Unified IP Phone 9971 supports Bluetooth 2.1 + EDR technology allowing for wireless headset communications.
Bluetooth enables low bandwidth wireless connections within a range of 30 feet, however it is recommended to keep the
Bluetooth device within 10 feet of the Cisco Unified IP Phone 9971.
Arabic
French
Polish
Bulgarian
German
Portuguese
Catalan
Greek
Romanian
Chinese
Hebrew
Russian
Croatian
Hungarian
Serbian
Czech
Italian
Slovak
Danish
Japanese
Slovenian
Dutch
Korean
Spanish
English
Latvian
Swedish
Estonian
Lithuanian
Thai
Finnish
Norwegian
Turkish

Cisco Unified IP Phone 9971 Wireless LAN Deployment Guide
15
Up to ten headsets can be paired, where the previously connected headset is given priority.
The Bluetooth device does not need to be within direct line-of-sight of the phone, but barriers, such as walls, doors, etc. can
potentially impact the quality.
Bluetooth utilizes the 2.4 GHz frequency just like 802.11b/g and many other devices (e.g. microwave ovens, cordless phones,
etc.), so the Bluetooth quality can potentially be interfered with due to using this unlicensed frequency.
Bluetooth Profiles
The Cisco Unified IP Phone 9971 supports the Bluetooth Headset and Hands-Free Profiles.
Headset Profile (HP)
With Bluetooth Headset Profile (HSP) support, the following features can be available if supported by the Bluetooth headset.
•Ring
•Answer a call
•End a call
•Volume Control
Hands-Free Profile (HFP)
With Bluetooth Hands-Free Profile (HFP) support, the following additional features can be available if supported by the
Bluetooth headset.
•Last Number Redial
•Call Waiting
•Divert / Reject
•3 way calling (Hold & Accept and Release & Accept)
•Speed Dialing
For more information, refer to the documentation from the Bluetooth headset manufacturer.
Coexistence (802.11b/g + Bluetooth)
If using Coexistence where 802.11b/g and Bluetooth are used simultaneously, then there are some limitations and deployment
requirements to be considered as they both utilize the 2.4 GHz frequency range.
Capacity
When using Coexistence (802.11b/g + Bluetooth), call capacity is reduced due to the utilization of CTS to protect the 802.11g
and Bluetooth transmissions.
Multicast Audio
Multicast audio from Push To Talk (PTT), Music on Hold (MMOH) and other applications are not supported when using
Coexistence.
Voice Quality

Cisco Unified IP Phone 9971 Wireless LAN Deployment Guide
16
Depending on the current data rate configuration, CTS may be sent to protect the Bluetooth transmissions when using
Coexistence.
In some environments, 6 Mbps may need to be enabled.
Note: It is highly recommended to use 802.11a if using Bluetooth due to 802.11b/g and Bluetooth both utilizing 2.4 GHz, but
also due to the above limitations.
Video Calls
As of the 9.0(2) release, the Cisco Unified IP Phone 9971 supports video calling.
The Cisco Unified IP Phone 9971 has a 5.6-inch 24 bit touchscreen color LCD.
In order to enable the video and camera capabilities, a device package or update for the Cisco Unified Communications
Manager must be applied.
The USB camera that attaches to the back of the Cisco Unified IP Phone 9971 or 9951 is also required to transmit video.
360p is the recommended video format to utilize.
For remote users, 360p should be the maximum video resolution enabled in the Cisco Unified IP Phone 9971 endpoint
configuration within Cisco Unified Communications Manager.
A Videoconferencing System with MCU running version 5.7 or later is required to provide videoconferencing capabilities.
H.264 is the protocol used for the video stream, where up to 30 fps (frames per second) are supported.
There is a separate stream for the audio session that utilizes one of the support audio codecs.
RTCP in the Cisco Unified IP Phone 9971 configuration within Cisco Unified Communications Manager should be enabled to
help sync the audio and video streams.
The following frame formats are supported:
• QCIF (176 x 144)
• CIF (352 x 288)
• 360p (640 x 360)
• VGA (640 x 480)

Cisco Unified IP Phone 9971 Wireless LAN Deployment Guide
17
Security
When deploying a wireless LAN, security is essential.
The Cisco Unified IP Phone 9971 supports the following wireless security features.
WLAN Authentication
•WPA (802.1x authentication + TKIP or AES encryption)
•WPA2 (802.1x authentication + AES or TKIP encryption)
•WPA-PSK (Pre-Shared key + TKIP encryption)
•WPA2-PSK (Pre-Shared key + AES encryption)
•EAP-FAST (Extensible Authentication Protocol - Flexible Authentication via Secure Tunneling)
•LEAP (Lightweight Extensible Authentication Protocol)
•CCKM (Cisco Centralized Key Management)
•Open
•Shared Key
WLAN Encryption
•AES (Advanced Encryption Scheme)
•TKIP / MIC (Temporal Key Integrity Protocol / Message Integrity Check)
•WEP (Wired Equivalent Protocol) 40/64 and 104/128 bit
The Cisco Unified IP Phone 9971 also supports the following additional security features.
•Image authentication
•Device authentication
•File authentication
•Signaling authentication
•Secure Cisco Unified SRST
•Media encryption (SRTP)
•Signaling encryption (TLS)
•Certificate authority proxy function (CAPF)
•Secure profiles
•Encrypted configuration files
•Settings Access (can limit user access to configuration menus)
Extensible Authentication Protocol - Flexible Authentication via Secure
Tunneling (EAP-FAST)
Extensible Authentication Protocol - Flexible Authentication via Secure Tunneling (EAP-FAST) encrypts EAP transactions
within a Transport Level Security (TLS) tunnel between the access point and the Remote Authentication Dial-in User Service
(RADIUS) server such as the Cisco Access Control Server (ACS).

Cisco Unified IP Phone 9971 Wireless LAN Deployment Guide
18
The TLS tunnel uses Protected Access Credentials (PACs) for authentication between the client (phone) and the RADIUS
server. The server sends an Authority ID (AID) to the client (Cisco Unified IP Phone 9971), which in turn selects the
appropriate PAC. The client (phone) returns a PAC-Opaque to the RADIUS server. The server decrypts the PAC with its
master-key. Both endpoints now have the PAC key and a TLS tunnel is created. EAP-FAST supports automatic PAC
provisioning, but it must enabled on the RADIUS server.
To enable EAP-FAST, a certificate must be installed on to the RADIUS server.
The Cisco Unified IP Phone 9971 currently supports automatic provisioning of the PAC only, so enable Allow anonymous in-
band PAC provisioning on the RADIUS server as shown below.
Both EAP-GTC and EAP-MSCHAPv2 must be enabled when Allow anonymous in-band PAC provisioning is enabled.
EAP-FAST requires that a user account be created on the authentication server.
If anonymous PAC provisioning is not allowed in the production wireless LAN environment then a staging Cisco ACS can be
setup for initial PAC provisioning of the Cisco Unified IP Phone 9971.
This requires that the staging ACS server be setup as a slave EAP-FAST server and components are replicated from the product
master EAP-FAST server, which include user and group database and EAP-FAST master key and policy info.
Ensure the production master EAP-FAST ACS server is setup to send the EAP-FAST master keys and policies to the staging
slave EAP-FAST ACS server, which will then allow the Cisco Unified IP Phone 9971 to use the provisioned PAC in the
production environment where Allow anonymous in-band PAC provisioning is disabled.
When it is time to renew the PAC, then authenticated in-band PAC provisioning will be used, so ensure that Allow
authenticated in-band PAC provisioning is enabled.
Ensure that the Cisco Unified IP Phone 9971 has connected to the network during the grace period to ensure it can use its
existing PAC created either using the active or retired master key in order to get issued a new PAC.
Is recommended to only have the staging wireless LAN pointed to the staging ACS server and to disable the staging access
point radios when not being used.

Cisco Unified IP Phone 9971 Wireless LAN Deployment Guide
19
Fast Secure Roaming (FSR)
CCKM is the recommended deployment model for all environment types where frequent roaming occurs.
CCKM enables fast secure roaming and limits the off-network time to keep audio gaps at a minimum when on call.
802.1x authentication is required in order to utilize CCKM.
802.1x without CCKM can introduce delay during roaming due to its requirement for full re-authentication. WPA and WPA2
introduce additional transient keys and can lengthen roaming time.
CCKM centralizes the key management and reduces the number of key exchanges.
When CCKM is utilized, roaming times can be reduced from 400-500 ms to less than 100 ms, where that transition time from
one access point to another will not be audible to the user.
As of the 9.1(1) release, the Cisco Unified IP Phone 9971 supports CCKM with WPA2 (AES or TKIP), WPA (TKIP or AES)
and 802.1x (WEP) authentication, where WPA2 (AES) with CCKM is recommended.
Authentication
Key Management
Encryption
EAP-FAST
802.1x, WPA, WPA2
AES, TKIP, WEP (40/64 or 104/128 bit)
LEAP
802.1x, WPA, WPA2
AES, TKIP, WEP (40/64 or 104/128 bit)
AKM
802.1x, WPA, WPA2
AES, TKIP, WEP (40/64 or 104/128 bit)
CCKM was not supported with WPA2 in releases prior to 9.1(1).
WPA Version
Cipher
Prior to 9.1(1)
9.1(1)
WPA
TKIP
Supported
Supported
AES
Not Supported
Supported
WPA2
TKIP
Not Supported
Supported
AES
Not supported
Supported
EAP and User Database Compatibility
The following chart displays the EAP and database configurations supported by the Cisco Unified IP Phone 9971.
Database Type
LEAP
EAP-FAST
(Phase Zero)
Cisco ACS
Yes
Yes
Windows SAM
Yes
Yes
Windows AD
Yes
Yes
LDAP
No
No

Cisco Unified IP Phone 9971 Wireless LAN Deployment Guide
20
ODBC
(ACS for Windows Only)
Yes
Yes
LEAP Proxy RADIUS
Server
Yes
Yes
All Token Servers
No
No
Power Management
The Cisco Unified IP Phone 9971 primarily is in active mode, so the radio will always be on.
However, power save protocols such as U-APSD or PS-POLL can be utilized for off-channel scanning or when using
Coexistence (802.11b/g + Bluetooth).
An AC adapter is required to use the 9971 in wireless LAN mode.
Wireless LAN is automatically disabled temporarily when Ethernet is connected, but will be automatically re-enabled once
Ethernet is disconnected if Wireless LAN was enabled previously.
Delivery Traffic Indicator Message (DTIM)
It is recommended to set the DTIM period to 2with a beacon period of 100 ms.
Broadcast and multicast traffic will be queued until the DTIM period when there are power save enabled clients associated to
the access point, so DTIM will determine how quickly these packets can be delivered to the client. If using multicast
applications, a shorter DTIM period can be used.
If multiple multicast streams exist on the wireless LAN frequently, then it is recommended to set the DTIM period to 1.
Quality of Service (QoS)
Quality of Service enables queuing to ensure high priority for voice and video traffic.
To enable proper queuing for voice, interactive video, and call control traffic use the following guidelines.
•Ensure that WMM is enabled on the access point.
•Create a QoS policy on the access point giving priority to voice, interactive video, and call control traffic.
Traffic Type
DSCP
802.1p
WMM UP
Port Range
Voice
EF (46)
5
6
UDP 16384 - 32767
Interactive Video &
Audio for Video Calls
AF41
(34)
4
5
UDP 16384 - 32767
Call Control
CS3 (24)
3
4
TCP 5060 - 5061
•Be sure that voice, interactive video, and call control packets have the proper QoS markings and other protocols are not
using the same QoS markings.