27-06-2013, 03:30 PM
Wireless WAN Applications
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Applications
Wireless WAN applications are endless for Trango long-range wireless Ethernet bridges. For example, a business may need to link its IT infrastructure to a few outlying buildings; a university or any school may need to provide internet access to dormitories or other buildings across campus; or a hospital may need to establish a secure link to a clinic across town so that doctors may securely exchange patient information over a high-speed connection.
Whether you need to a network connection across the street, across town, or from urban to rural areas, Trango wireless WAN/LAN building-to-building outdoor networks are ideal for any private enterprise or network operator that requires high-speed connectivity between two or more remote locations. Trango long range wireless wide area network (WWAN) solutions are well suited for a wide variety of industries and applications because they deliver high-capacity bandwidth, are extremely reliable, highly secure, and can be established with minimal effort and cost.
Advantages Of WAN
• Covers a large geographical area so long distance businesses can connect on the one network
• Shares software and resources with connecting workstations
• Messages can be sent very quickly to anyone else on the network. These messages can have pictures, sounds, or data included with them (called attachments).
• Expensive things (such as printers or phone lines to the internet) can be shared by all the computers on the network without having to buy a different peripheral for each computer.
• Everyone on the network can use the same data. This avoids problems where some users may have older information than others.
• Share information/files over a larger area
• large network cover
Disadvantages Of WAN
• Are expensive and generally slow
• Need a good firewall to restrict outsiders from entering and disrupting the network
• Setting up a network can be an expensive and complicated experience. The bigger the network the more expensive it is.
• Security is a real issue when many different people have the ability to use information from other computers. Protection against hackers and viruses adds more complexity and expense.
• Once set up, maintaining a network is a full-time job which requires network supervisors and technicians to be employed.
• Information may not meet local needs or interests
• Vulnerable to hackers or other outside threats
Cellular-Based Wireless WANs
As shown in Figure 7-6, a cellular system consists of cell towers, concentrators, voice switches, and data gateways. The cell tower receives signals from user devices and transmits information back to the user. The voice switch connects the user device to another wireless, or wired, user through the telephone distribution system. This part of the system supports customary phones calls between users.
Third-Generation Cellular
Many of the telecommunications operators are now beginning to offer what's known as third-generation cellular (3G cellular), with even better support for data communications. The Universal Mobile Telecommunications System (UMTS) is capable of 2-Mbps data rates for in-building implementations, up to 384 kbps in urban areas, and 144 kbps in rural areas. As a result, 3G is able to support multimedia applications.
There has been considerable argument in the wireless industry on whether 3G will replace 802.11 (Wi-Fi)wireless LAN technology. With higher data rates for indoor use, 3G is an alternative to wireless LANs. 802.11 continues, however, to have performance upgrades that significantly exceed 3G. For example, the 802.11a standard specifies data rates of 54 Mbps, which is much higher than 3G. Also, wireless LANs are much less expensive to deploy.