Voice over 802.11
This guide for telecommunications professionals describes in detail how to engineer each component of 802.11 and VoIP for reliable, high-quality voice transmission.
TABLE OF CONTENTS Voice over 802.11
Chapter 8: Objections Due to Interference and QoS on Vo802.11 Wireless Networks
Overview
If Vo802.11 networks are to be a viable bypass of the PSTN, they must deliver a subscriber experience comparable to or better than that of the PSTN. This is especially important with regard to voice services. Incumbent telcos take great pride in delivering good voice quality on their legacy networks with relatively reliable service. The concern many have when it comes to replacing the copper wires or fiber cables of the PSTN with the air waves of 802.11 is that the air waves, given that they are not as controllable or predictable as copper wire or fiber cables, will deliver an inferior QoS or may be susceptible to interference from other emitters in the electromagnetic spectrum.
Voice is a challenging medium to deliver in packet-switched networks. QoS in wired VoIP networks remains a topic of almost endless discussion. Network managers strive to shave milliseconds off the delivery time of voice packets on state-of-the-art IP networks. Given the emphatic focus on QoS in wired packet networks, one of the foremost concerns regarding Vo802.11 is that it cannot deliver the QoS necessary for intelligible voice quality. As with any other telecommunications engineering puzzle, it is only a matter of good engineering to deliver voice quality as good or better than that of the PSTN over Vo802.11 networks. This chapter covers how QoS can be optimized on an 802.11 network. Good voice quality is the by-product of optimal QoS engineering on an 802.11 network.
What will entice consumers, both business and residential,...
Copyright ARTECH HOUSE, INC. 2004 under license agreement with Books24x7
