Before installing the wireless IP phone, you must choose a method for adding phones to the Cisco Unified Communications Manager database. Some methods require entering the MAC address of the phone. The following table provides an overview of these methods.
Table 1 Phone addition methods for the Cisco Unified Communications Manager Database
Requires MAC address?
Results in automatic assignment of directory numbers
Autoregistration with the Tool for Auto-Registered Phones Support (TAPS)
Requires autoregistration and Bulk Administration Tool (BAT); updates information in the Cisco Unified IP Phone and in Cisco Unified Communications Manager Administration
Allows for simultaneous registration of multiple phones
Cisco Unified Communications Manager Administration only
Requires phones to be added individually
The following sections describe methods for adding phones.
Use autoregistration to enter phones into the Cisco Unified Communications Manager database without first gathering MAC addresses from the phones. When autoregistration is enabled, Cisco Unified Communications Manager automatically assigns the next available sequential directory number (DN) to new phones during the initial phone startup process.
After registering the phones, you can modify settings, such as the DNs and device pools, by using Cisco Unified Communications Manager Administration.
Autoregistration is disabled by default in Cisco Unified Communications Manager Administration. You must enable and properly configure autoregistration before connecting any Cisco Unified IP Phone to the network. For information about enabling and configuring autoregistration, see Cisco Unified Communications Manager Administration Guide.
Autoregistration and TAPS Phone Addition
Use autoregistration and TAPS to add phones to the Cisco Unified Communications Manager database. Add the phones first by using BAT to the Cisco Unified Communications Manager database with dummy MAC addresses. Then use TAPS to update MAC addresses and download predefined configurations for the phones.
To implement TAPS, dial a TAPS DN and follow voice prompts. When the process is complete, the phone has downloaded its DN and other settings. The correct MAC address for the phone is updated in Cisco Unified Communications Manager Administration.
You must enable autoregistration in Cisco Unified Communications Manager Administration for TAPS to function.
For Cisco Unified Communications Manager Release 5.0 or earlier, see Bulk Administration Tool User Guide for Cisco Unified Communications Manager for detailed instructions about BAT and TAPS. For Cisco Unified Communications Manager Release 6.0 or later, see Cisco Unified Communications Manager Bulk Administration Guide.
BAT phone addition
Add a group of phones to the Cisco Unified Communications Manager database by using BAT. This tool performs batch operations, including registration, on multiple phones. You need the MAC addresses for each phone before you use BAT.
The following table describes how to determine the MAC address of the wireless IP phone.
Table 2 Determine the MAC address of the phone
For more information
Choose SETTINGS > Model Information > MAC Address and look at the MAC Address field.
Perform one of the following after collecting the MAC addresses:
Cisco Unified Communications Manager Release 5.0 or later: Choose Device > Phone and click Add New.
Cisco Unified Communications Manager Release 4.x: Choose Device > Add a New Device.
For additional instructions and conceptual information about Cisco Unified Communications Manager, see the Cisco Unified Communications Manager Administration Guide and Cisco Unified Communications Manager System Guide.
Cisco Unified Communications Manager Release 4.3 and later require a device package or service release update installed to enable device support for the Cisco Unified Wireless IP Phone. Device packages including support for the Cisco Unified Wireless IP Phone are available at http://www.cisco.com/kobayashi/sw-center/sw-voice.shtml.
Review the following warnings before installing the Cisco Unified Wireless IP Phone. To see translations of these warnings, see the Regulatory Compliance and Safety Information for the Cisco Unified Wireless IP Phone 7920 Series and Peripherals document that accompanied the device.
This warning symbol means danger. You are in a situation that could cause bodily injury. Before you work on any equipment, be aware of the hazards involved with electrical circuitry and be familiar with standard practices for preventing accidents. Use the statement number provided at the end of each warning to locate its translation in the translated safety warnings that accompanied this device. Statement 1071
Read the installation instructions before connecting the system to the power source. Statement 1004
This equipment will not be able to access emergency services during a power outage because of reliance on utility power for normal operation. Alternative arrangements should be made for access to emergency services. Access to emergency services can be affected by any call-barring function of this equipment.
Do not use the Cisco Unified Wireless IP Phone 7925G and 7926G in hazardous environments such as areas where high levels of explosive gas may be present. Check with the site safety engineer before using any type of wireless device in such an environment.
The plug-socket combination for the battery charger must be accessible at all times, because it serves as the main disconnecting device. Statement 1019
The battery charger requires short-circuit (overcurrent) protection to be provided as part of the building installation. Install only in accordance with national and local wiring regulations. Statement 1045
The power supply must be placed indoors. Statement 331
Ultimate disposal of this product should be handled according to all national laws and regulations. Statement 1040
Telephone receivers produce a magnetic field that can attract small magnetic objects such as pins and staples. To avoid the possibility of injury, do not place the handset where such objects may be picked up.
The battery charger used with Cisco Unified IP Wireless Phone 7925G-EX is not ATEX or CSA certified and as such it should not be charged in hazardous environment.
Use CSA or ATEX qualified Bluetooth accessories with the Cisco Unified IP Wireless Phone 7925G-EX in hazardous environments.
These battery safety notices apply to the batteries that are approved by the Cisco Unified Wireless IP Phone manufacturer.
There is the danger of explosion if the battery is replaced incorrectly. Replace the battery only with the same or equivalent type recommended by the manufacturer. Dispose of used batteries according to the manufacturer’s instructions. Statement 1015
Ultimate disposal of this product should be handled according to all national laws and regulations. Statement 1040
Do not dispose of the battery pack in fire or water. The battery may explode if placed in a fire.
The battery pack is intended for use only with this device.
Do not disassemble, crush, puncture, or incinerate the battery pack.
To avoid risk of fire, burns, or damage to your battery pack, do not allow a metal object to touch the battery contacts.
Handle a damaged or leaking battery with extreme care. If you come in contact with the electrolyte, wash the exposed area with soap and water. If the electrolyte has come in contact with the eye, flush the eye with water for 15 minutes and seek medical attention.
Do not charge the battery pack if the ambient temperature exceeds 104 degrees Fahrenheit (40 degrees Celsius).
Do not expose the battery pack to high storage temperatures (above 140 degrees Fahrenheit, 60 degrees Celsius).
When discarding a battery pack, contact your local waste disposal provider regarding local restrictions on the disposal or recycling of batteries.
To obtain a battery, contact your local dealer. Use only the batteries that have a Cisco part number.
Extended use battery
Use only the Cisco power supply that is compatible with your phone. To order your power supply, contact your local dealer and refer to the list of Cisco part numbers.
The battery and power supply are not provided with your phone. To order the battery and power supply, contact your local dealer.
Cisco Unified Wireless IP Phone 7925G, 7925G-EX, and 7926G Installation
After setting up the wireless network to support voice communications and configuring the wireless IP phones in Cisco Unified Communications Manager, you are ready to install the phones. The following sections contain installation information.
The Cisco Unified Wireless IP Phone uses a battery for power. The following table lists the types of batteries available for the wireless IP phone and the maximum talk and standby times.
Table 3 Batteries available for the Cisco Unified Wireless IP Phone 7925G, 7925G-EX, and 7926G
Lithium ion (Li-ion)
Up to 9.5 hrs
Up to 180 hrs
Up to 13 hrs
Up to 240 hrs
Use U-APSD for talk-time power save mode. Also 5 GHz talk time is reduced up to 30 minutes for a standard battery and up to 2 hours for an extended battery. Use of 802.11b/g and a Bluetooth headset can reduce the talk time by 40 to 50 percent. To extend talk-time battery life, the Cisco Unified Wireless IP Phone can use PS-POLL power save methods. The Cisco Unified Wireless IP Phone uses either U-APSD or PS-POLL when in idle (no active phone call).
When an AP supports the Cisco Compatible Extensions (CCX) proxy ARP information element, the idle battery life is optimized. If the AP does not support CCX or proxy ARP is not enabled, then the idle battery life is up to 50 percent less.
The following table shows the charging time for the two types of batteries. You can stop charging the battery when the battery is fully charged. Lithium ion batteries can be partially charged without shortening the battery life. Batteries should handle up to 4000 recharges.
Battery life varies because of environmental factors and Bluetooth use.
Table 4 Battery charging time
Power supply connected to phone
Phone connected to PC and USB cable
The following sections provide information about the battery and charging the phone.
To install the battery in the wireless IP phone, follow these steps.
Remove the cover on the back of the phone as shown in the following figure.
Figure 1. Remove cover to install the battery
To install the battery, insert the battery catches in the corresponding slots at the bottom of the Cisco Unified Wireless IP Phone. Ensure that the metal contacts on the battery and the phone are facing each other.
Press the battery to the body of the phone until it locks into place. See the following figure.
Figure 2. Install the battery
Battery insertion slots
To remove the battery, press up on the locking catch, then lift and remove the battery.
Figure 3. Replace the back cover
Cover insertion slots
The MAC address for each Cisco Unified Wireless IP Phone appears on a printed label on the back of the phone underneath the battery.
Charge phone battery using power supply
Use the following figure and steps to charge the phone battery quickly.
Figure 4. Charge the phone battery
Lift the mini-USB port cover on the bottom of phone.
Swing the port cover to one side.
Insert the AC power supply mini-USB connector in the port.
Insert the AC plug adapter in the slot on the power supply.
Insert the AC power supply in a wall outlet.
The indicator light indicates the charging status:
Battery charging in process.
Battery charging is complete.
You can use the phone while the battery is being charged. For charging times, see Phone power.
Charge phone battery using USB cable and PC
Figure 5. Charge the phone battery using the USB cable and PC.
The following figure shows how to connect your phone to a PC to charge the phone battery.
Insert the phone connector on the USB cable into the phone.
Insert the USB A-type connector into the USB port on your PC.
Monitor the indicator light after the phone briefly displays USB Connected on the status line.
If you see the Found New Hardware Wizard popup message, stop the wizard from opening when connecting to USB port, using the following steps:
Click Next to use the wizard dialog box.
In the Update New Software dialog, click No, not this time, and click Next.
Click Install the Software automatically (Recommended) and click Next.
After a few moments, the Cannot Install This Hardware dialog displays. Click Don't prompt me again to install this software.
Click Finish to close the dialog box.
While the battery is charging, the indicator light is red. When the battery is fully charged, the indicator light turns green. Charging times are longer when you use this method and are described in Phone power.
WLAN Settings from Cisco Unified Wireless IP Phone Web Pages
You can access the Cisco Unified Wireless IP Phone web pages to set up the WLAN settings in the network profile. For a new phone with the factory default settings, you must use the USB cable to connect the phone to your PC.
Although Cisco performs some internal testing of third-party wired and Bluetooth wireless headsets for use with the Cisco Unified Wireless IP Phone, Cisco does not certify or support products from headset or handset vendors. Because of the inherent environmental and hardware inconsistencies in the locations where Cisco Unified IP Phones are deployed, there is not a single "best" solution that is optimal for all environments. Cisco recommends that customers test the headsets that work best in their environment before deploying a large number of units in their network.
Use CSA or ATEX qualified accessories with the Cisco Unified IP Phone 7925G-EX in hazardous environments.
Cisco recommends the use of good quality external devices, like headsets that are screened against unwanted radio frequency (RF) and audio frequency (AF) signals. Depending on the quality of these devices and their proximity to other devices such as cell phones and two-way radios, some audio noise may still occur. See External device use for more information.
The primary reason that a particular headset would be inappropriate for the Cisco Unified IP Phone is the potential for an audible hum. This hum can be heard by either the remote party or by both the remote party and the Cisco Unified IP Phone user. Some humming or buzzing sounds can be caused by a range of outside sources; for example, electric lights, being near electric motors or large PC monitors. In some instances, the mechanics or electronics of various headsets can cause remote parties to hear an echo of their own voice when they speak to Cisco Unified IP Phone users.
You can use the headset with all of the features on the Cisco Unified Wireless IP Phone, including the Volume and Mute buttons. Use the phone buttons to adjust the ear piece volume and to mute the speech path from the headset microphone.
To connect a headset to the Cisco Unified Wireless IP Phone , lift the headset port cover on the right side of the phone.
Plug the headset into the headset port.
Bluetooth Wireless Headsets
The Cisco Unified Wireless IP Phone supports Bluetooth Class 2 technology with Hands-Free Profile Version 1.5 when the headsets support Bluetooth. Bluetooth enables low bandwidth wireless connections within a range of 33 feet (10 meters). The best performance is in the 3 to 6 foot (1 to 2 meter) range.
Because of potential interference issues, Cisco recommends that you:
Reduce the proximity of other 802.11b/g devices, Bluetooth devices, microwave ovens, and large metal objects.
Use the Cisco Unified Wireless IP Phone on the same side of the body as the Bluetooth-enabled headset.
Using Bluetooth wireless headsets will likely increase battery power consumption on your phone and might result in reducing battery life.
For a Bluetooth wireless headset to work, it does not need to be within direct line-of-sight of the phone, but some barriers, such as walls or doors, and interference from other electronic devices, can affect the connection.
The Cisco Unified Wireless IP Phone pairs with headsets using a shared key authentication and encryption method. The authentication process can require a personal identification number (PIN) specific to the headset, commonly "0000." The Cisco Unified Wireless IP Phone can be paired with more than one headset at a time. Pairing is typically performed once for each headset.
After a device has been paired, its Bluetooth connection remains as long as both devices (phone and headset) are enabled and within range of each other. The connection reestablishes itself automatically if either of the devices powers down then powers up. The green-dotted Bluetooth icon indicates whether a device is connected.
The Cisco Unified Wireless can be connected to only one Bluetooth-enabled headset at a time. Further, the Cisco Unified Wireless IP Phone only supports communication with Bluetooth wireless technology-enabled devices qualified by the Bluetooth Special Interest Group (SIG).
When headsets are more than 10 meters away from Cisco Unified Wireless IP Phone, Bluetooth drops the connection after a 15 to 20 second timeout. If the paired headset comes back into range of the Cisco Unified Wireless IP Phone and the phone is not connected to another Bluetooth headset, then the in-range Bluetooth headset automatically reconnects. For certain phone types that operate in power-save modes, the user may have to "wake up" the headset by tapping on its operational button to initiate the reconnect.
Users should read the headset user guide for more information about pairing and connecting the headsets.
Beyond the physical, mechanical, and technical performance, the audio portion of a headset must sound good to you (the user) and to the party on the far end. Sound is subjective and Cisco cannot guarantee the performance of any headsets, but some of the headsets on the sites listed below have been reported to perform well on Cisco Unified IP Phones.
Nevertheless, it is ultimately the customer's responsibility to test this equipment in their own environment to determine suitable performance.
For information about wired and Bluetooth wireless headsets for your phone, see the Cisco Unified Wireless IP Phone 7925G, 7925G-EX, and 7926G Accessory Guide and these web sites:
Cisco recommends the use of good quality external devices, such as speakers, microphones, and headsets that are shielded (screened) against unwanted radio frequency (RF) and audio frequency (AF) signals.
Depending on the quality of these devices and their proximity to other devices, such as mobile phones or two-way radios, some audio noise may still occur. In these cases, Cisco recommends that you take one or more of the following actions:
Move the external device away from the source of the RF or AF signals.
Route the external device cables away from the source of the RF or AF signals.
Use shielded cables for the external device, or use cables with a better shield and connector.
Shorten the length of the external device cable.
Apply ferrites or other such devices on the cables for the external device.
Cisco cannot guarantee the performance of the system because Cisco has no control over the quality of external devices, cables, and connectors. The system performs adequately when suitable devices are attached with good quality cables and connectors.
In European Union countries, use only external headsets that are fully compliant with the EMC Directive [89/336/EC].
Cisco Unified Wireless IP Phone 7925G, 7925G-EX, and 7926G Startup
After charging the battery and configuring the wireless IP phone, you are ready to power on the phone and connect to the WLAN.
To power on the Cisco Unified Wireless IP Phone, press and hold the Power On button until the phone begins its startup process by cycling through these steps:
The phone displays the Cisco Systems screen.
The phone screen displays these messages as the phone starts up:
Locating Network Services
Configuring Unified CMList
The following information displays on the main phone screen:
Current time and date
Primary directory number
Main screen icons for four menus and Help
Your current options on status line
Softkey labels (Messages and Options)
When the phone passes through these stages with no errors, the phone has started up properly. Now the phone is in standby mode and is ready to place or receive calls.
The signal icon in the upper left corner shows the strength of the signal between the wireless access point and the phone. The phone must have an adequate signal to successfully place or receive calls. If the signal icon displays only one bar, the weak signal can cause problems with phone performance.
When connecting to the wireless VoIP network, the Cisco Unified Wireless IP Phone goes through a standard startup process, as described in the following list. Depending on your specific network configuration, not all of these steps may occur on your wireless IP phone.
Powering on the phone. The Cisco Unified Wireless IP Phone has nonvolatile flash memory in which it stores firmware images and user-defined preferences. At startup, the phone runs a bootstrap loader that loads a phone image stored in Flash memory. Using this image, the phone initializes its software and hardware. For more information, see Phone power and Startup and Connectivity Problems.
Scanning for an access point. The Cisco Unified Wireless IP Phone scans the RF coverage area with its radio. The phone searches its network profiles and scans for access points that have a matching SSID and authentication type. The phone associates with the access point with the highest RSSI that matches with its network profile. For more information, see Cisco Unified Wireless AP Interactions and Startup and Connectivity Problems.
Authenticating with access point. The Cisco Unified Wireless IP Phone begins the authenticating process.
If set for Open, then any device can authenticate to the access point. For added security, static WEP encryption might optionally be used.
If set to Shared Key, the phone encrypts the challenge text using the WEP key and the access point must verify that the WEP key was used to encrypt the challenge text before network access is available.
If set for LEAP, EAP-FAST, or PEAP, the username and password are authenticated by the RADIUS server before network access is available.
If set for EAP-TLS, the phone requires one or more of the following certificates:
a client certificate and the RADIUS root certificate
the CA certificate
If set for Auto (AKM), the phone looks for an access point with one of the following key management options enabled:
WPA, WPA2, or CCKM
The username and password are authenticated by the RADIUS server before network access is available.
WPA-Pre-shared key, WPA2-Pre-shared key
The phone authenticates with the access point using the pre-shared key.
Configuring IP network. If the wireless IP phone is using DHCP to obtain an IP address, the phone queries the DHCP server to obtain one. If you are not using DHCP in your network, you must assign a static IP address to each phone locally. In addition to assigning an IP address, the DHCP server directs the wireless IP phone to a TFTP server. If the phone has a statically defined IP address, you must configure the TFTP server IP address locally on the phone; the phone then contacts the TFTP server directly. For more information, see:
Downloading Load ID. The wireless IP phone checks to verify that the proper firmware is installed or if new firmware is available to download. Cisco Unified Communications Manager informs devices using .cnf or .cnf.xml format configuration files of their load ID. Devices using .xml format configuration files receive the load ID in the configuration file. For more information, see Phone Configuration Files and Profile Files.
Downloading configuration file. The TFTP server has configuration files and profile files. A configuration file includes parameters for connecting to Cisco Unified Communications Manager and information about which image load a phone should be running. A profile file contains various parameters and values for phone and network settings. For more information, see:
Connecting to Cisco Unified Communications Manager. The configuration file defines how the Cisco Unified IP Phone communicates with Cisco Unified Communications Manager. After obtaining the file from the TFTP server, the phone attempts to make a TCP connection to the highest priority Cisco Unified Communications Manager on the list. For more information, see:
Registering to Cisco Unified Communications Manager. If the phone was manually added to the database, Cisco Unified Communications Manager identifies and registers the phone. If the phone was not manually added to the database and autoregistration is enabled in Cisco Unified Communications Manager, the phone attempts to autoregister itself in the Cisco Unified Communications Manager database. For more information, see: