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Cisco Systems 7920 manual Standard for Wireless LAN Communications

Models: 7920

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Chapter 1 An Overview of the Cisco Wireless IP Phone 7920

Understanding the Voice Wireless Network

Figure 1-2 Wireless LAN with Cisco Wireless IP Phone 7920s

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The 802.11 Standard for Wireless LAN Communications

Wireless LANs must follow the Institute of Electrical and Electronics Engineers (IEEE) 802.11 standards that define the protocols that govern all Ethernet-based wireless traffic. The 802.11b sub-standard is the most prevalent standard in wireless LAN communications and is commonly called WiFi. The 802.11b standard specifies the radio frequency (RF) of 2.4 GHz for both transmitting and receiving data at speeds of 1, 2, 5.5 and 11 Mbps.

The 2.4 GHz RF range is an open frequency range that does not require licensing. Many devices operate in this bandwidth including cordless phones and microwave ovens; consequently, wireless communication is susceptible to interference or noise. Interference does not destroy the signal, but can impede the transmission speed and reduce an 11 Mbps signal down to a 1Mbps signal. In addition, RF interference can reduce the voice quality over the wireless network. To help prevent interference, direct-sequence spread spectrum (DSSS) technology was developed to spread the signal out over the frequency range or bandwidth. DSSS technology multiplexes chunks of data over several frequencies so that multiple

 

 

Cisco Wireless IP Phone 7920 Administration Guide for Cisco CallManager Release 3.3 or Later

 

 

 

 

 

 

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Cisco Systems manual Standard for Wireless LAN Communications, Wireless LAN with Cisco Wireless IP Phone 7920s
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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.