inter−VLAN routing configured. See the Configuring 802.1Q Trunking on the Catalyst 2924 XL section of this document.

General Troubleshooting Hints

∙All devices must have IP connectivity.

∙The Cisco Aironet 1200 AP must have the IP address of the Cisco Secure ACS configured.

∙The Cisco Secure ACS must have a Aironet RADIUS Client Entry for the Cisco Aironet 1200 AP, with the correct IP address.

∙The Cisco Aironet 1200 AP and the Cisco Secure ACS Aironet RADIUS Client Entry must have the same RADIUS Shared Secret key.

∙The user name and password assigned to the Cisco 7920 must be entered into the database that the Cisco Secure ACS is using.

∙The Cisco Aironet 1200 AP must be sending and receiving Aironet RADIUS traffic through the native VLAN of the trunk to which the 1200 AP is connected.

∙If the Cisco Aironet 1200 AP is configured with VLANs, then the first SSID with which the Cisco 7920 finds a match on the 1200 AP will be used to indicate the VLAN over which the Cisco 7920 should communicate. For instance, if the Cisco 7920 has SSID1=Larry, SSID2=Curly, and SSID3=Moe, and the Cisco Aironet 1200 AP has SSIDs George on VLAN1, Paul on VLAN2, and Curly on VLAN3, then the 7920 will connect through VLAN3.

∙This version of the Cisco 7920 does not support TKIP or MIC. Verify that you have not enabled either of these features.

∙Verify that you do not have protocol filters on the Cisco Aironet 1200 AP (or access control lists [ACLs] in other devices) that are blocking the VoIP signaling traffic or the VoIP voice traffic.

∙If you are able to place calls to and from the Cisco 7920, and you are experiencing problems with voice quality, you can determine if the Cisco Aironet 1200 AP is part of the problem. Disconnect its Ethernet cable and connect a wired IP Phone, such as a Cisco 7960 IP Phone, to the same cable. You may need to make some modifications on the Catalyst switch port, such as establishing a Voice or Auxiliary VLAN, to allow the phone to connect properly. If the wired IP Phone also experiences poor voice quality, then you have VoIP QoS problems in you network that need to be resolved before the Cisco 7920 can be implemented. If the wired IP Phone does not experience poor voice quality, then you need to determine if your Cisco Aironet 1200 AP is over−subscribed. Another possible problem could be RF interference.

∙Wireless clients that use LEAP and Broadcast Key Rotation, and that are associated to an access point with VLANs disabled, will lose connectivity with the access point after the second key rotation. The workaround is to enable VLANs, but this will prevent the use of Proxy Mobile IP on that device. For more information, refer to Field Notice: LEAP and Broadcast Key Rotation Requires VLAN Config on AP1200.

Appendix: Configuring the Cisco 7920 with CallManager

The Cisco 7920 files are available at Cisco 7920 Wireless Phone Software Downloads ( registered customers only)

.

1.Copy the Cisco 7920 phone image to the TFTP directory on the Cisco CallManager server (for example, C:\Program Files\Cisco\TFTPPath\).

2.Copy the OS7920.txt file in the same directory. Verify that the contents of this file is a single line with the file name of the image that the Cisco 7920 will load. For instance:

cmterm_7920.3.2−01−01

3. Add the Cisco 7920 to the Cisco CallManager as a Cisco 7960 IP Phone.

Note: You do not need to specify the image to load.

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Cisco Systems appendix Appendix Configuring the Cisco 7920 with CallManager, General Troubleshooting Hints
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7920 specifications

Cisco Systems, a leading player in the global networking and communications technology sector, designed the Cisco 7920 Wireless IP Phone for mobile professionals seeking seamless connectivity in various environments. Primarily aimed at enhancing communication within enterprise settings, this wireless device offers a plethora of features that cater to the specific needs of businesses.

At the core of the Cisco 7920 is its robust wireless functionality. It operates on IEEE 802.11b/g wireless protocols, allowing users to connect effortlessly to Wi-Fi networks. This flexibility enables employees to communicate effectively from various locations within an office space, promoting mobility and collaboration without being tethered to a desk.

The ergonomic design of the Cisco 7920 prioritizes user comfort. Its lightweight casing and intuitive button layout ensure that users can navigate the interface with ease. The device is equipped with a vibrant color display, allowing for clear visibility of caller ID, call status, and menu options, enhancing the user experience further. Additionally, the handset supports a wide variety of languages, making it suitable for global teams.

In terms of features, the Cisco 7920 is loaded with advanced capabilities. It supports voice over IP (VoIP), delivering high-quality audio and ensuring reliable communication. Users benefit from features like a contextual menu, call hold, transfer, conference calling, and voicemail access on the go. The phone also offers a wide range of ringtones, allowing customization to suit personal preferences or company branding.

Security is a crucial aspect of modern telecommunications, and the Cisco 7920 does not fall short. It incorporates industry-standard security protocols such as Wired Equivalent Privacy (WEP) and Wi-Fi Protected Access (WPA), safeguarding communications from potential threats.

Moreover, the Cisco 7920 integrates seamlessly with Cisco Unified Communications Manager, enabling centralized management and control. This integration ensures that IT departments can deploy, manage, and troubleshoot devices efficiently, streamlining operations while ensuring optimal performance.

In conclusion, the Cisco 7920 Wireless IP Phone stands out as a versatile communication tool designed for the fast-paced workplace. Its combination of wireless connectivity, ergonomic design, advanced features, and robust security makes it an essential accessory for businesses looking to elevate their communication strategies. With its established reputation, Cisco continues to support companies in achieving seamless connectivity and effective collaboration.
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