VoIP For Dummies by Timothy V. Kelly

Author:Timothy V. Kelly
Language: eng
Format: epub, pdf
Publisher: Wiley

Moving up to wireless

Wireless networks take the idea of network access to a new, never-before-seen level of service, allowing more flexibility in how users may connect to the network. If your organization has already migrated to IP telephony, the LAN side of the enterprise (or the LAN side of each site location in a multilocation company) is running a standard Ethernet-based network. Because the LAN architecture is Ethernet, it is based on the IEEE 802 series of standards and is therefore compatible with WiFi.

To upgrade an Ethernet LAN running IP telephony to support wireless telephony, the only requirement is to add VoIP-compatible wireless access points (WAP). The WAP devices have a limited range, so they should be added to the network in a manner that is most useful for wireless VoIP users. All WAP devices should be connected to the LAN through switched ports as opposed to simple hubs. A hub merely provides a physical, plain-vanilla connection to the network, whereas Ethernet switches provide fault isolation at every port and therefore are more conducive with the wireless telephony application.

Finally, users need a wireless IP telephone. Such a phone looks a lot like a cell phone and operates within a few hundred feet of the WAP devices. However, users can avoid the expense of a separate phone by using VoIP soft phone on their WiFi-ready computers. Any computer that permits you to add a WiFi card can run VoIP. Wireless IP telephones and soft phones are discussed in more detail in Chapter 10.

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