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

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.