Cisco Systems 7920 manual Channel Re-Use, 802.11b/802.11g Channel Reuse Diagram

Page 34

Chapter 4 Conducting a WIPT Survey

How To Survey for the WIPT

Figure 4-1 Ideal WIPT Environment

A typical deployment showing a 15-20% overlap from each of the adjoining cells.

Provides almost complete redundancy throughout the cell

Channel

1

Channel

11

The radius of the cell should be:

67 dBm

 

The separation of

 

same channel cells

 

should be:

 

19 dBm

 

7920 RSSI=20

67dB

86dB

Channel

6

135075

Channel Re-Use

Figure 4-2shows the typical channel re-use for 802.11b and 802.11g WLANs. The two gold channel 1 cells are -86 dBm apart from center to center. The same separation should be maintained between floors of a multi-floor site.

Figure 4-2 802.11b/802.11g Channel Reuse Diagram

You can use the two Aironet client tools and the survey tool in the 7920 to measure cell separation. The ACU for the PCM350 client has an active survey mode. Cisco recommends an active survey where there are transmitted and received packets of the same size as a voice packet.

Site Survey Guide for Deploying Cisco 7920 IP Phones

4-4

OL-6315-01

 

 

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Contents Site Survey Guide for Deploying Cisco 7920 IP Phones Site Survey Guide for Deploying Cisco 7920 IP Phones N T E N T S OL-6315-01 Preface Preface Site Survey Guide for Deploying Cisco 7920 IP Phones Overview Recommendations for Successful VoIP SurveysGetting started ACU Site Survey Window Minimum Requirements for Wipt Cells Strength Minimum SNRIdeal Wipt Environment 67dB 86dB ChannelData Rate and Signal Strength Considerations Multi-floor survey Survey in a Building with Multiple FloorsComparison of a Manual Survey and an Automated Survey Hospital Floor Survey with AirMagnet SurveyorHospital Floor Survey by a Survey Crew OL-6315-01 Survey Tools AirMagnet Survey ToolADU CB21 ACU Site Survey Window ADU Advanced Status Window AirMagnet Survey Tool AirMagnet Packet Decode Window AiroPeek Window AiroPeek dBm and Signal Percentage Real-Time Graphs Choose Wireless Settings Choose Data Rate 11 Cisco 7920 IP Phone Survey Screen Survey Tools for Packet Jitter 13 AirMagnet Jitter Tool15 AirMagnet in a Home Office with Low 802.11 Traffic 14.15 percent utilization result reflects a call at 1 Mbps OL-6315-01 Survey Design for Cell Capacity Surveying for Cell Capacity and Channel Re-UseSite Survey Guide for Deploying Cisco 7920 IP Phones How To Survey for the Wipt Conducting a Wipt Survey802.11b/802.11g Channel Reuse Diagram Channel Re-UseManual Survey for the Wipt ACU Site Survey WindowsACU Site Survey Active Mode Automated Survey for the WiptAirMagnet Surveyor Main AirMagnet Survey Active Mode AirMagnet Client Walkabout AirMagnet Showing Access Points and Merged Display AirMagnet Four-Panel Display OL-6315-01 Access Point Positioning Site SurveysAccess Point Installed on a Wall Antennas and Antenna PositioningPatch Antenna Mounted on a Wall Patch Antenna Mounted on a Suspended Ceiling Additional Sources of Information OL-6315-01
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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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