Objections to Wireless Networks

The position that wireless technologies will replace the PSTN is met with a number of objections. Primarily, these objections are focused on quality of service (QoS) issues, the security of the wireless network, limitations in the range of the delivery of the service, and the availability of bandwidth. This book overcomes these objections.

Quality of Service (QoS)

One of the primary concerns about wireless data delivery is that, like the Internet over wired services, QoS is inadequate. Contention with other wireless services, lost packets, and atmospheric interference are recurring problems for 802.11b and its associated wireless protocols as alternatives to the PSTN. QoS is also related to the ability of a wireless Internet service provider (WISP) to accommodate voice on its network. The PSTN cannot be replaced until an alternative, competent replacement for voice over copper wire is available (see Figure 1-3).

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Figure 1-3: An overview of a broadband wireless alternative to the PSTN

Security

The press has been quick to report on weaknesses found in wireless networks. 802.11b has two built-in basic network security mechanisms: the service set identifier (SSID) and Wireless Equivalency Privacy (WEP). These measures may be adequate for residences and small businesses, but they are inadequate for entities that require stronger security. A number of measures that will provide the necessary level of security for the subscriber can be added to those wireless networks. This book provides suggestions for deploying industrial-grade security.

Range

In most applications, 802.11b offers a range of about 100 meters. So how, you might ask, will that technology offer the range to compete with the PSTN? Range is a function of antenna design and power, but mostly antenna design. With the right antenna, the range of 802.11 is extended to tens of miles.



Wi-Fi Handbook(c) Building 802.11b Wireless Networks
Wi-Fi Handbook : Building 802.11b Wireless Networks
ISBN: 0071412514
EAN: 2147483647
Year: 2003
Pages: 96

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