Email Delivery

Receive new posts as email.

Email address

Syndicate this site

RSS 0.91 | RSS 2.0
RDF | Atom
Podcast only feed (RSS 2.0 format)
Get an RSS reader
Get a Podcast receiver

Contact

About This Site
Contact Us
Privacy Policy

Search

Google

Web this site

January 2007
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      

Stories by Category

Academia :: Academia
Administrative :: Administrative
Convergence :: Convergence
Future :: Future
Hardware :: Hardware Chips Devices Voice Devices
Hotspots :: Hotspots
Industry Issues :: Industry Issues Competition Deals
Internet telephony :: Internet telephony
Legal :: Legal Lawsuits regulatory
Service Launches :: Service Launches Trials
Software :: Software
Standards :: Standards IMS SIP UMA
Temporary Ntworks :: Temporary Ntworks
VoIP Networks :: VoIP Networks Gizmo Project Skype
VoWLAN :: VoWLAN Testing
Voice over IP over Cellular :: Voice over IP over Cellular
limitations :: limitations

Archives

January 2007 | December 2006 | November 2006 | October 2006 | September 2006 | August 2006 | July 2006 | June 2006 | May 2006 | April 2006 | March 2006 | February 2006 | January 2006 | December 2005 | November 2005 | October 2005 | September 2005 | July 2005 | June 2005 | May 2005 | April 2005 | March 2005 |

Recent Entries

VoWLAN Audio Tests from Interop
Into the Belly of the VoWLAN Beast at Interop
Wi-Fi Network Supports Voice at VON Show

Site Philosophy

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.

Copyright

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

Category: Temporary Ntworks

May 5, 2006

VoWLAN Audio Tests from Interop

By Glenn Fleishman

Matthew Gast has posted audio files showing the quality of VoWLAN in testing at Interop: Gast, who works for enterprise switch maker Trapeze Networks, is part of the Interop Labs testing crew, which this year put together systems to test handsets and Quality of Service (QoS) using the 802.11e Wi-Fi Multimedia (WMM) prioritization scheme. WMM should allow voice packets to move unimpeded in the queue ahead of other data, thus making a VoWLAN call sound like a POTS (plain old telephone service) call.

Gast’s first audio recording explains the parameters of their testing and notes a lot of the particulars that make VoWLAN so difficult to implement correctly. Two following audio files show a call without WMM and with WMM. The difference is very noticeable. Gast made the calls in the challenging RF environment of Interop in which he could stop 40 to 70 APs from the booth in which he was working.

In months past, Gast has estimated the practical number of VoWLAN calls possible in 802.11b, g, and a networks. I’ll be looking forward to his analysis of 802.11n, which has vastly higher throughput and range; it can also preserve higher speeds at greater distances. One of the stumbling blocks in moving 802.11n through the IEEE process was a concern about certain elements that might make 802.11n’s use in handsets impractical. Those concerns have apparently been addressed.

Posted by Glennf at 12:56 PM | Comments (0) | TrackBack

April 17, 2006

Into the Belly of the VoWLAN Beast at Interop

By Glenn Fleishman

Matthew Gast reports on pre-Interop festivities in configuring VoWLAN devices: Gast worked with Interop Labs to set up the VoIP over WLAN systems that will be demonstrated and tested at the enormous conference in Las Vegas next week. They spent quite a bit of time pre-flighting to make sure that what they want to work will work before they’re on site at the show.

Gast says that they’re testing VoIP’s interaction with security features this year, along with examining the year-over-year improvement in 802.11 phones.

Posted by Glennf at 1:30 PM | Comments (0) | TrackBack

March 29, 2005

Wi-Fi Network Supports Voice at VON Show

By Nancy Gohring

Strix Systems deployed a Wi-Fi network to support voice and data at the Voice on the Net (VON) show: Strix says that one IT manager deployed 25 nodes in a day. All but two were fully wireless so the network operated on a mesh architecture. Strix reports that as many as 450 users were on the network at one time, with 25 percent of them using voice devices. The network separated voice and data traffic, giving priority to voice traffic.

It would be nice to get more of a third party evaluation of the network, only because Strix and Pulver have a vested interest in the success of this network. Still, it sounds like it was a fairly simple network to deploy and it supported a high volume of voice and data users.

Posted by nancyg at 6:27 AM | Comments (0) | TrackBack