Receive new posts as email.
RSS 0.91 | RSS 2.0
RDF | Atom
Podcast only feed (RSS 2.0 format)
Get an RSS reader
Get a Podcast receiver
| Sun | Mon | Tues | Wed | Thurs | Fri | Sat |
|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | 6 | |
| 7 | 8 | 9 | 10 | 11 | 12 | 13 |
| 14 | 15 | 16 | 17 | 18 | 19 | 20 |
| 21 | 22 | 23 | 24 | 25 | 26 | 27 |
| 28 | 29 | 30 | 31 |
This site operates as an independent editorial operation. Advertising, sponsorships, and other non-editorial materials represent the opinions and messages of their respective origins, and not of the site operator or JiWire, Inc.
Entire site and all contents except otherwise noted © Copyright 2001-2006 by Glenn Fleishman. Some images ©2006 Jupiterimages Corporation. All rights reserved. Please contact us for reprint rights. Linking is, of course, free and encouraged.
Powered by
Movable Type
« Vonage Releases VoWLAN Phone | Main | NetGear Introduces Skype Wi-Fi Phone »
Matthew Gast runs the numbers to find out how many simultaneous calls are practical per access point: VoWLAN depends on having a great availability of access points in dense areas so that callers receive preferably wireline “dial tone” availability, or, at worst, cellular availability. Gast walks through the requirements for major coder/decoder (codec) routines used for VoIP. He provides tables and graphs for the maximum possible number of calls that could theoretically run across a network assuming no contention and all slots filled.
Gast shows the inherent benefit of 802.11a over 802.11g: 802.11a has no older standard to worry about; 802.11g must contend with (pun intended) 802.11b. Even a nominally all G network invokes protection whenever B packets are encountered, thus significantly reducing network throughput. Gast calculates that this protection of G packets in mixed B/G environments drops theoretical call capacity by one-quarter to one-third.
Posted by Glennf at December 15, 2005 3:21 PM
Categories: limitations