Cisco 7925G - Unified Wireless IP Phone VoIP Quick reference guide

Cisco Unified Wireless IP Phone 7925G, 7925G-EX, and 7926G
Deployment Guide
The Cisco Unified Wireless IP Phone 7925G, 7925G-EX, and 7926G are adaptable for all mobile professionals, from users on
the move within an office environment to nurses and doctors in a healthcare environment to associates working in the
warehouse, on the sales floor, or in a call center. Staff, nurses, doctors, educators, and IT personnel can be easily reached when
mobile utilizing a Bluetooth headset. The Cisco Unified Wireless IP Phone 7925G, 7925G-EX, and 7926G are Bluetooth 2.0 +
EDR (Enhanced Data Rate) compliant and supports both the headset and hands-free profiles. The Cisco Unified Wireless IP
Phone 7925G, 7925G-EX, and 7926G are MIL-STD-810F, Method 516.5, Procedure I compliant. The Cisco Unified Wireless
IP Phone 7925G and 7926G is IP54 rated protecting it from dust, liquid splashes and moisture, where the Cisco Unified
Wireless IP Phone 7925G-EX is IP64 rated for complete dust protection and also certified for use in explosive and hazardous
environments.
This guide provides information and guidance to help the network administrator deploy the Cisco Unified Wireless IP Phone
7925G, 7925G-EX, and 7926G successfully in a wireless LAN environment.

Cisco Unified Wireless IP Phone 7925G, 7925G-EX, and 7926G Deployment Guide
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Revision History
Date
Comments
10/13/08
1.3(1) Release
11/17/09
1.3(2) and 1.3(3) Release
05/03/10
1.3(4) Release
08/30/10
1.3(4)SR2 Release
12/15/10
1.4(1) Release
08/14/12
1.4(1)SR1 and 1.4(2) Release
08/21/12
1.4(3) Release
03/22/13
1.4(3)SR1
05/24/13
1.4(4) Release
08/20/13
1.4(5) Release

Cisco Unified Wireless IP Phone 7925G, 7925G-EX, and 7926G Deployment Guide
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Contents
Cisco Unified Wireless IP Phone 7925G, 7925G-EX, 7926G Overview ...............................................................................................7!
Requirements .............................................................................................................................................................................................7!
Site Survey ...............................................................................................................................................................................................7!
RF Validation ..........................................................................................................................................................................................7!
Call Control.............................................................................................................................................................................................9!
Protocols .................................................................................................................................................................................................9!
Access Points.........................................................................................................................................................................................10!
Antennas ................................................................................................................................................................................................12!
Models.......................................................................................................................................................................................................13!
7925G-EX Certifications.......................................................................................................................................................................14!
7926G Barcode Scanner .......................................................................................................................................................................15!
World Mode (802.11d) ..........................................................................................................................................................................16!
Supported Countries..........................................................................................................................................................................16!
Radio Characteristics............................................................................................................................................................................17!
Language Support .................................................................................................................................................................................18!
Bluetooth ..................................................................................................................................................................................................18!
Bluetooth Profiles..................................................................................................................................................................................18!
Coexistence (802.11b/g + Bluetooth)....................................................................................................................................................19!
Security.....................................................................................................................................................................................................19!
Extensible Authentication Protocol – Flexible Authentication via Secure Tunneling (EAP-FAST).....................................................20!
Extensible Authentication Protocol – Transport Layer Security (EAP-TLS)........................................................................................22!
Protected Extensible Authentication Protocol (PEAP).........................................................................................................................24!
Cisco Centralized Key Management (CCKM) ......................................................................................................................................26!
EAP and User Database Compatibility.................................................................................................................................................26!
Power Management.................................................................................................................................................................................27!
Protocols ...............................................................................................................................................................................................28!
Unscheduled Auto Power Save Delivery (U-APSD)........................................................................................................................28!
Power Save Poll (PS-POLL).............................................................................................................................................................28!
Active Mode......................................................................................................................................................................................29!
Delivery Traffic Indicator Message (DTIM) .........................................................................................................................................29!
Scan Modes............................................................................................................................................................................................29!
Quality of Service (QoS) .........................................................................................................................................................................29!
Configuring QoS in Cisco Unified Communications Manager.............................................................................................................30!
Configuring QoS Policies for the Network............................................................................................................................................30!
Configuring Cisco Switch Ports........................................................................................................................................................30!
Configuring Cisco IOS Access Points ..............................................................................................................................................31!
Configuring Switch Ports for Wired IP Phones ................................................................................................................................31!
Sample Voice Packet Capture...........................................................................................................................................................32!
Call Admission Control.........................................................................................................................................................................32!

Cisco Unified Wireless IP Phone 7925G, 7925G-EX, and 7926G Deployment Guide
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Pre-Call Admission Control..............................................................................................................................................................33!
Roaming Admission Control.............................................................................................................................................................34!
Traffic Classification (TCLAS)..............................................................................................................................................................34!
Roaming....................................................................................................................................................................................................35!
Interband Roaming................................................................................................................................................................................36!
Multicast...................................................................................................................................................................................................36!
Designing the Wireless LAN...................................................................................................................................................................37!
Planning Channel Usage.......................................................................................................................................................................37!
5 GHz (802.11a)................................................................................................................................................................................37!
Using Dynamic Frequency Selection (DFS) on Access Points ....................................................................................................38!
2.4 GHz (802.11b/g) .........................................................................................................................................................................39!
Signal Strength and Coverage...........................................................................................................................................................40!
Configuring Data Rates.........................................................................................................................................................................42!
Call Capacity.........................................................................................................................................................................................43!
Dynamic Transmit Power Control (DTPC) ..........................................................................................................................................44!
Rugged Environments............................................................................................................................................................................44!
Multipath...........................................................................................................................................................................................46!
Verification with Site Survey Tools .......................................................................................................................................................47!
Cisco 792xG Neighbor List ..............................................................................................................................................................47!
Cisco 792xG Site Survey ..................................................................................................................................................................48!
Configuring Cisco Unified Communications Manager........................................................................................................................50!
Phone Button Templates........................................................................................................................................................................50!
Softkey Templates ..................................................................................................................................................................................50!
Security Profiles ....................................................................................................................................................................................51!
G.722 Advertisement .............................................................................................................................................................................52!
Common Settings...................................................................................................................................................................................52!
Audio Bit Rates......................................................................................................................................................................................52!
Product Specific Configuration Options ...............................................................................................................................................53!
Scanner Commands for Cisco 7926G ...............................................................................................................................................59!
Configuring the Cisco Unified Wireless LAN Controller and Access Points ....................................................................................61!
SSID / WLAN Settings ...........................................................................................................................................................................62!
Controller Settings ................................................................................................................................................................................66!
802.11 Network Settings........................................................................................................................................................................68!
Beamforming (ClientLink)................................................................................................................................................................69!
Auto RF (RRM) ................................................................................................................................................................................70!
Client Roaming .................................................................................................................................................................................72!
Call Admission Control.....................................................................................................................................................................72!
EDCA Parameters .............................................................................................................................................................................75!
DFS (802.11h)...................................................................................................................................................................................76!
CleanAir ............................................................................................................................................................................................76!
AP Groups .............................................................................................................................................................................................77!
RF Profiles ........................................................................................................................................................................................79!
Multicast Direct.....................................................................................................................................................................................80!
QoS Profiles ..........................................................................................................................................................................................81!

Cisco Unified Wireless IP Phone 7925G, 7925G-EX, and 7926G Deployment Guide
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QoS Basic Service Set (QBSS)...............................................................................................................................................................84!
CCKM Timestamp Tolerance................................................................................................................................................................85!
Auto-Immune .........................................................................................................................................................................................85!
WLAN Controller Advanced EAP Settings............................................................................................................................................86!
Proxy ARP .............................................................................................................................................................................................87!
TKIP Countermeasure Holdoff Time ....................................................................................................................................................88!
VLANs and Cisco Autonomous Access Points ......................................................................................................................................88!
Configuring the Cisco Unified Wireless IP Phone 7925G, 7925G-EX, and 7926G ...........................................................................89!
Wireless LAN Settings ...........................................................................................................................................................................90!
USB Settings..........................................................................................................................................................................................95!
Installing Certificates ............................................................................................................................................................................96!
Using Templates to Configure Phones................................................................................................................................................103!
Using the Bulk Deployment Utility......................................................................................................................................................104!
Bulk Export .....................................................................................................................................................................................107!
Default Export.................................................................................................................................................................................108!
Pushing Configuration Files to the Cisco 792xG............................................................................................................................108!
Wavelink Avalanche ............................................................................................................................................................................108!
Local Phone Book and Speed Dials ....................................................................................................................................................118!
Bluetooth Settings................................................................................................................................................................................120!
Increased Font.....................................................................................................................................................................................121!
Using the Cisco Unified Wireless IP Phone 7925G Desktop Charger ...............................................................................................122!
Bluetooth Pairing ............................................................................................................................................................................122!
Docking ...........................................................................................................................................................................................123!
Using Phone Designer.........................................................................................................................................................................124!
Upgrading Firmware ..........................................................................................................................................................................125!
Hardware Compatibility..................................................................................................................................................................127!
IP Phone Services ..................................................................................................................................................................................128!
Extensible Markup Language (XML)..................................................................................................................................................128!
XSI Audio Path Control..................................................................................................................................................................128!
Java Mobile Information Device Profile (MIDP) ...............................................................................................................................129!
Troubleshooting.....................................................................................................................................................................................130!
Device Homepage................................................................................................................................................................................130!
Device Information..............................................................................................................................................................................131!
Wireless LAN Information...................................................................................................................................................................132!
Network Information ...........................................................................................................................................................................133!
Stream Statistics ..................................................................................................................................................................................134!
Wireless LAN Statistics .......................................................................................................................................................................135!
Network Statistics................................................................................................................................................................................136!
Cisco 7926G Barcode Status Messages ..............................................................................................................................................138!
Phone Logs..........................................................................................................................................................................................138!
Trace Settings..................................................................................................................................................................................138!
Trace Modules ............................................................................................................................................................................139!

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Trace Levels................................................................................................................................................................................140!
Trace Logs.......................................................................................................................................................................................140!
Traffic Stream Metrics (TSM) .............................................................................................................................................................141!
Radio Status Indicator.........................................................................................................................................................................142!
Hardware Diagnostics ........................................................................................................................................................................143!
Firmware Recovery .............................................................................................................................................................................143!
Restoring Factory Defaults .................................................................................................................................................................144!
Capturing a Screenshot of the Phone Display ....................................................................................................................................144!
Healthcare Environments .....................................................................................................................................................................145!
Cleaning the Phone................................................................................................................................................................................145!
Accessories..............................................................................................................................................................................................145!
Additional Documentation....................................................................................................................................................................148!

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Cisco Unified Wireless IP Phone 7925G, 7925G-EX, 7926G Overview
The Cisco Unified Wireless IP Phone 7925G, 7925G-EX, and 7926G provide mobile communication within enterprises. The
levels of voice quality performance that have come to be expected from Cisco products are maintained in the Cisco Unified
Wireless IP Phone 7925G, 7925G-EX, and 7926G 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
Wireless IP Phone 7925G, 7925G-EX, and 7926G in order to take advantage of the 802.11n data rates available. Despite the
optimizations that Cisco have implemented in the Cisco Unified Wireless IP Phone 7925G, 7925G-EX, and 7926G, the use of
unlicensed spectrum means that uninterrupted communication can not be guaranteed, and there may be the possibility of voice
gaps of up to several seconds during multimedia conversations. Adherence to the deployment guidelines will reduce the
likelihood of these voice 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 Wireless IP Phone 7925G, 7925G-EX,
and 7926G is not intended as a medical device and should not be used to make clinical decisions.
Requirements
The Cisco Unified Wireless IP Phone 7925G, 7925G-EX, and 7926G are IEEE 802.11a/b/g wireless IP phones that provide
voice communications.
The wireless LAN must be validated to ensure it meets the requirements to deploy the Cisco Unified Wireless IP Phone 7925G,
7925G-EX, and 7926G.
Site Survey
Before deploying the Cisco Unified Wireless IP Phone 7925G, 7925G-EX, or 7926G 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 frequency 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
frequency band for operation and even more highly recommended when the Cisco Unified Wireless IP Phone 7925G, 7925G-
EX, or 7926G 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 the access point platform type, antenna type, and 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

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The cell edge should be designed to -67 dBm where there is a 20-30% overlap of adjacent access points at that signal
level.
This ensures that the Cisco Unified Wireless IP Phone 7925G, 7925G-EX, and 7926G 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 Wireless IP Phone 7925G, 7925G-EX, and 7926G
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 Wireless IP Phone 7925G, 7925G-EX, and
7926G can hold a signal for at least 5 seconds.
Channel Utilization
Channel Utilization levels should be kept under 50%.
If using the 7925G, 7925G-EX, and 7926G phone, this is provided via the QoS Basic Service Set (QBSS), which
equates to around 105.
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 Wireless IP Phone 7925G, 7925G-EX, and 7926G
can meet 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

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http://www.cisco.com/en/US/prod/collateral/netmgtsw/ps6491/ps6705/ps6535/data_sheet_c78-636705.html
•AirMagnet (Survey, WiFi Analyzer, VoFi Analyzer, Spectrum Analyzer)
http://www.airmagnet.com
Call Control
The Cisco Unified Wireless IP Phone 7925G, 7925G-EX, and 7926G utilize Skinny Client Control Protocol (SCCP) for call
control with the following communications platforms.
7925G and 7925G-EX
•Cisco Unified Communications Manager (CUCM)
Minimum = 4.3
Recommended = 7.1(5), 8.5, 8.6, 9.1 and later
•Cisco Unified Communications Manager Express (CUCME)
Minimum = 4.3
Recommended = 8.6 and later
•Cisco Unified Survivable Remote Site Telephony (SRST)
Minimum = 4.3
Recommended = 8.6 and later
7926G
•Cisco Unified Communications Manager (CUCM)
Minimum = 7.1(5)
Recommended = 7.1(5), 8.5, 8.6, 9.1 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 Wireless IP Phone 7925G, 7925G-EX, and 7926G device support.
Cisco Unified Communications Manager 5.1 or higher requires signed COP files.
Device packages for Cisco Unified Communications Manager are available at the following location.
http://software.cisco.com/download/navigator.html?mdfid=278875240
Protocols
Supported voice and wireless LAN protocols include the following:

Cisco Unified Wireless IP Phone 7925G, 7925G-EX, and 7926G Deployment Guide
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•CCX v4
•Wi-Fi MultiMedia (WMM)
•Unscheduled Auto Power Save Delivery (U-APSD)
•Traffic Specification (TSPEC)
•Traffic Classification (TCLAS)
•Skinny Call Control Protocol (SCCP)
•Real Time Protocol (RTP)
•G.711, G.722, G.729, iLBC
•Real Time Control Protocol (RTCP)
•Cisco Discovery Protocol (CDP)
•Syslog
Access Points
The Cisco Unified Wireless IP Phone 7925G, 7925G-EX, and 7926G are 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 = 7.0.240.0, 7.2.115.2, 7.3.112.0, 7.4.110.0, 7.5.102.0
•Cisco IOS Access Points (Autonomous)
Minimum = 12.4(21a)JY
Recommended = 12.4(25d)JA2, 15.2(2)JB
The supported access point models are listed below.

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Note: The Cisco Unified Wireless IP Phone 7925G, 7925G-EX, and 7926G are currently supported with the Cisco AP3600
when the internal 802.11abgn radio is utilized, however are not currently supported in conjunction with the 802.11ac module
(AIR-RM3000AC) for the Cisco AP3600.
The table below lists the modes that are supported by each Cisco Access Point.
Cisco AP Series
802.11a
802.11b
802.11g
802.11n
Unified
Autonomous
500
No
Yes
Yes
No
Yes
Yes
600
Yes
Yes
Yes
Yes
Yes
No
1040
Yes
Yes
Yes
Yes
Yes
Yes
1100
No
Yes
Optional
No
Yes
Yes
1130 AG
Yes
Yes
Yes
No
Yes
Yes
1140
Yes
Yes
Yes
Yes
Yes
Yes
1200
Optional
Yes
Optional
No
Yes
Yes
1230 AG
Yes
Yes
Yes
No
Yes
Yes

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Note: VoWLAN is not currently supported in conjunction with outdoor MESH technology (1500 series).
3rd party access points have limited support, as there is no interoperability testing performed against 3rd party access points.
However the user should have basic functionality when connected to a Wi-Fi compliant access point.
The Cisco Unified Wireless IP Phone 7925G, 7925G-EX, and 7926G can take advantage of Cisco Client Extensions (CCX)
enabled access points.
See the following links for more info on CCX.
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 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 and 3602i Series Access Points are to be mounted on the ceiling as they
have omni-directional antennas and are not designed to be patches.
1240 AG
Yes
Yes
Yes
No
Yes
Yes
1250
Yes
Yes
Yes
Yes
Yes
Yes
1260
Yes
Yes
Yes
Yes
Yes
Yes
1600
Yes
Yes
Yes
Yes
Yes
Yes
2600
Yes
Yes
Yes
Yes
Yes
Yes
3500
Yes
Yes
Yes
Yes
Yes
Yes
3600
Yes
Yes
Yes
Yes
Yes
Yes
860
No
Yes
Yes
Yes
No
Yes
870
No
Yes
Yes
No
No
Yes
880
No
Yes
Yes
Yes
Yes
Yes
890
Yes
Yes
Yes
Yes
Yes
Yes
UC500
No
Yes
Yes
No
No
Yes

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Models
There are four Cisco Unified Wireless IP Phone 7925G models, one Cisco Unified Wireless IP Phone 7925G-EX model, and
one Cisco Unified Wireless IP Phone 7926G model.
The Cisco Unified Wireless IP Phone 7925G and 7926G models are grey in color, where the Cisco Unified Wireless IP Phone
7925G-EX is yellow in color.
The regulatory domain can be identified by navigating to Settings > Model Information > WLAN Regulatory Domain and
then referencing the Regulatory Domain number in the table below.
The Cisco Unified Wireless IP Phone 7925G-EX, and Cisco Unified Wireless IP Phone 7926G are configured like the Cisco
Unified Wireless IP Phone 7925G –W model, which requires an 802.11d enabled access point.
Use the following tables to identify specific phone versions that support these regulatory domains for use around the world:
7925G
Part Number
Regulatory
Domain
Regulatory
Domain
Number
Frequency Range
Available
Channels
Channel Set
CP-7925G-A-K9
FCC
(Americas)
1050
2.412 – 2.462 GHz
5.180 – 5.240 GHz
5.260 – 5.320 GHz
5.500 – 5.700 GHz
5.745 – 5.805 GHz
11
4
4
8
4
1-11
36,40,44,48
52,56,60,64
100-140
149,153,157,161
CP-7925G-E-K9
ETSI
(Europe)
3051
2.412 – 2.472 GHz
5.180 – 5.700 GHz
13
16
1-13
36-48,52-64,100-140
CP-7925G-P-K9
Japan
4157
2.412 – 2.472 GHz
2.412 – 2.484 GHz
5.180 – 5.700 GHz
13 (802.11g)
14 (802.11b)
16
1-13
1-14
36-48,52-64,100-140
CP-7925G-W-K9
Rest of
World
5252
Uses 802.11d to identify available channels and transmit
powers. Channels operating at 2.412 GHz - 2.484 GHz and
5.180 GHz - 5.805 GHz are supported.
7925G-EX
Part Number
Regulatory
Domain
Number
Frequency Range
Available
Channels
Channel Set
CP-7925G-EX-K9
5252
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

Cisco Unified Wireless IP Phone 7925G, 7925G-EX, and 7926G Deployment Guide
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7926G
Part Number
Regulatory
Domain
Number
Frequency Range
Available
Channels
Channel Set
CP-7926G -K9
5252
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
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.
7925G-EX Certifications
The Cisco Unified Wireless IP Phone 7925G-EX has both Atmoshpheres Explosibles (ATEX) Zone 2/Class 22 and Canadian
Standards Association (CSA) Class1/Division II certifications in order to allow it to be used in hazardous and explosive
environments.
Atmospheres Explosibles (ATEX) Zone 2/Class 22 Certification
Organizations in the European Union must follow the ATEX directives to protect employees from explosion risk in areas with
an explosive atmosphere.
•ATEX 95 equipment directive 94/9/EC
Equipment and protective systems intended for use in potentially explosive atmospheres.
•ATEX 137 workplace directive 99/92/EC
Minimum requirements for improving the safety and health protection of workers potentially at risk from explosive
atmospheres.
Areas classified into zones (0, 1, 2 for gas-vapor-mist and 20, 21, 22 for dust) must be protected from effective sources of
ignition. Equipment and protective systems intended to be used in zoned areas must meet the requirements of the directive.
Zone 0 and 20 require Category 1 marked equipment, zone 1 and 21 required Category 2 marked equipment and zone 2 and 22
required Category 3 marked equipment. Zone 0 and 20 are the zones with the highest risk of an explosive atmosphere being
present.
Certification ensures that the equipment is fit for its intended purpose and that adequate information is supplied with it to ensure
that it can be used safely.
Canadian Standards Association (CSA) Class I/Division II Certification
Laws and regulations in most municipalities, states, and provinces in North America require certain products to be tested to a
specific standard or group of standards when they are to be deemed intrinsically safe when used in an explosive environment.
In North America, hazardous locations have traditionally been defined by the following combination of Class and Division:

Cisco Unified Wireless IP Phone 7925G, 7925G-EX, and 7926G Deployment Guide
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•Class I - A location where a quantity of flammable gas or vapor, sufficient to produce an explosive or ignitable
mixture, may be present in the air.
•Class II - A location made hazardous by the presence of combustible or electrically conductive dust, including Groups
E (metal dust), F (coal dust) and G (grain dust).
•Class III - A location made hazardous by the presence of easily ignitable fibers in the air, but not likely in sufficient
quantities to produce ignitable mixtures.
•Division 1 - A location where a classified hazard is likely to exist.
•Division 2 - A location where a classified hazard does not normally exist but is possible under abnormal conditions.
Internationally (and more recently in North America, for Class I hazardous locations), areas where explosive gas atmospheres
are likely to be present are divided into three IEC-defined Zones:
•Zone 0 - An area in which an explosive gas atmosphere is continuously present or present for long periods.
•Zone 1 - An area in which an explosive gas atmosphere is likely to occur in normal operation.
•Zone 2 - An area in which an explosive gas atmosphere does not normally exist.
7926G Barcode Scanner
The Cisco Unified Wireless IP Phone 7926G leverages the Cisco Unified Wireless IP Phone 7925G design, but with the
addition of a 2D barcode scanner.
A Java MIDlet application is required to invoke the scanner.
Java MIDP support is included in the initial 1.4(1)SR1 release for the Cisco Unified Wireless IP Phone 7926G.
The Java MIDlet for the Cisco Unified Wireless IP Phone 7926G will be a custom built application for a customer, where
lookups can be queried against their own databases.
The Cisco Unified Wireless IP Phone 7926G supports both the Basic and Extended barcode symbology groups.
•Basic – Code 39, Code 128, DataMatrix, EAN-13, UCC/EAN128, UPC, PDF 417
•Extended – Code 39, Code 128, DataMatrix, EAN-13, UCC/EAN128, UPC, PDF 417, Aztec, Codabar, Code 11, Code
93/93i, EAN Add-On 2, GS1 Databar, Interleave 2 of 5, Matrix 2 of 5, Maxicode, Micro PDF 417, Plessey, QRCode,
Standard 2 of 5, Telepen
See the Product Specific Configuration Options section for information on how to configure barcode options.
For more info on creating Java MIDlet applications for the Cisco Unified Wireless IP Phone 7926G, refer to the following
URL.
http://developer.cisco.com/web/jmapi/home

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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 Wireless IP Phone 7925G World (-W) model, the Cisco Unified Wireless IP Phone 7925G-EX or
Cisco Unified Wireless IP Phone 7926G model, then it is required to enable 802.11d. The Cisco Unified Wireless IP Phone
7925G gives precedence to 802.11d to determine the 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 Wireless IP Phone 7925G, 7925G-EX, and 7926G will passively scan DFS channels first before engaging in
active scans of those channels.
If 802.11d information is not available from the access point, then the Cisco Unified Wireless IP Phone 7925G (-A, -E, -P)
model uses the locally configured regulatory domain. If the Cisco Unified Wireless IP Phone 7925G -A, -E or -P model is
taken to another country, where the access point uses a different regulatory domain, then 802.11d will be required for the Cisco
Unified Wireless IP Phone 7925G to operate successfully.
If using 2.4 GHz (802.11b/g) and 802.11d is not enabled, then the Cisco Unified Wireless IP Phone 7925G, 7925G-EX, and
7926G 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 Wireless IP Phone 7925G, 7925G-EX,
and 7926G.
Argentina (AR)
India (IN)
Poland (PL)
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 / KP)
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)

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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)
Iceland (IS)
Peru (PE)
Philippines (PH)
Venezuela (VE)
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 Wireless IP Phone 7925G,
7925G-EX, and 7926G.
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
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

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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 integrated antenna gain.
See the Designing the Wireless LAN for Voice section for more information on signal requirements.
Language Support
The Cisco Unified Wireless IP Phone 7925G, 7925G-EX, and 7926G support the following languages.
The corresponding locale package must be installed to enable support for that language. English is the default language.
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 Wireless IP Phone 7925G, 7925G-EX, and 7926G support Bluetooth 2.0 + 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 Wireless IP Phone 7925G, 7925G-EX, and 7926G.
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 Wireless IP Phone 7925G, 7925G-EX, and 7926G support 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.
Bulgarian
French
Portuguese
Catalan
German
Romanian
Chinese
Greek
Russian
Croatian
Hungarian
Serbian
Czech
Italian
Slovak
Danish
Japanese
Slovenian
Dutch
Korean
Spanish
English
Norwegian
Swedish
Finnish
Polish

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•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
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.
Security
When deploying a wireless LAN, security is essential.
The Cisco Unified Wireless IP Phone 7925G, 7925G-EX, and 7926G support the following wireless security features.
WLAN Authentication
•WPA (802.1x authentication + TKIP or AES encryption)

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•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)
•EAP-TLS (Extensible Authentication Protocol – Transport Layer Security)
•PEAP (Protected Extensible Authentication Protocol) MS-CHAPv2
•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 Wireless IP Phone 7925G, 7925G-EX, and 7926G also support the following additional security features.
•X.509 Digital Certificates
•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)
•Locked network profiles
•Administrator password
Extensible Authentication Protocol – Flexible Authentication via Secure
Tunneling (EAP-FAST)
This client server security architecture 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).
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 Wireless IP Phone 7925G, 7925G-EX, and 7926G),