Conducting a Wipt Survey

C H A P T E R 4

This chapter describes specific steps for performing a site survey for WIPT.

How To Survey for the WIPT

Cisco recommends that the first step of a survey is to work with administrators at the local site to determine the requirements of the RF network. Determine what the coverage areas are or will become. Determine the number of RF network users by location in the site. If the site already has an active RF network, learn the site’s radio frequencies, equipment locations, and equipment characteristics. Next, do a complete scan for RF signals throughout the site. Determine the levels of RF at the site, and verify that the information you’ve been given about the locations of RF devices is correct. Report your findings to the site administrators.

Cisco recommends that the next step is to find on the drawings the locations of the existing RF devices. Use the drawings to estimate the cells based on the requirements for 7920 call capacities and cell design. Plan the antennas needed and transmit powers required for the access points within the site. When surveying with an existing WLAN, plan for the areas to be filled in and for changes to existing data rate and transmit power settings. Plan on possible changes to antenna types. At a multi-floor site, plan the survey of the coverage for the floor above and below. When doing a manual survey, record the cell edges of the current floor and then use your survey tool on other floors to measure and record the signal levels. When doing an automated survey, include the access point on the floors above and below in the walk-through survey.

When you survey a site without an installed 802.11 network, plan to use two or three access points to measure cell coverage and cell overlap. The cell edge for the 7920 at the 11-Mbps data rate is -67 dBm. The signal strength at the edge of that cell needs to be 19 dB weaker than the signal from the next cell on the same channel. That means at the -67 dBm edge of the cell, the next cell on the same channel should measure -86 dBm, as shown in Figure 4-1.

Site Survey Guide for Deploying Cisco 7920 IP Phones

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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.