"The deliberate and deadly attacks which were carried out yesterday against our country were more than acts of terror. They were acts of war."George W. Bush
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History of the Telephone - From Bell to VoIP and Beyond
Everyone knows the story of Alexander Graham Bell inventing the telephone. There's the story of Bell's first words, "Mr. Watson, come here, I want to see you," that's indelibly printed on our brains from childhood. However, what some don't know is that ...
Its War I tell you !
As you may or may not know, a new computer is extremely vulnerable when you first get online with it. There are ways to insure security though. You can get the Windows Update CD from Microsoft and install that before you get online. You can also get most ...
Webcams: Science Fiction Communication at Home
One of the most incredible inventions I've ever come across is the web cam and its process of video conferencing. This is just so futuristic I can't believe they really exist and are readily available to anyone with the Internet, speakers, and the right ...
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Most of today's companies are maximizing their travel budgets and communication requirements by making smart use of videoconferencing as an alternative to face-to-face meetings. With this decision to implement enterprise-level videoconferencing comes a requirement for bandwidth solutions which are reliable and cost effective.
Videoconferencing can leverage the existing public telephone network, a private IP network or the Internet. The target bandwidth for interactive video communications is in the 300K to 400K bit/sec per stream range. This includes audio and video as well as control signaling.
The H.323 protocol does not require that two or more endpoints in a session send the same data rate they receive. A low-powered endpoint may only be able to encode at a rate of 100K bit/sec, but, because decoding is less processor-intensive, it could decode a 300K bit/sec videostream.
Nevertheless, in videoconferencing, bandwidth is assumed to be symmetrical. In full-duplex networks such as ISDN, Ethernet, ATM and time division multiplexed networks, capacity is expressed as bandwidth in one direction, though equal bandwidth is available for traffic in the opposite direction.
You need to estimate the number of simultaneous sessions your network needs to support, and figure out if your network has bandwidth end-to-end.
A T-1 bandwidth circuit offers 1.5M bit/sec in each direction and would be ample bandwidth for two 512K bit/sec or three 384K bit/sec videoconferences, depending on the amount of simultaneous traffic on the network. Also, make sure that you have 10/100 switched Ethernet throughout the LAN segments where videoconferencing traffic is expected.
Multipoint conference bandwidth (with which three or more locations can see and hear one another) is calculated separately from point-to-point sessions. Multipoint can be conducted in either IP or ISDN environments, and some conferencing units will support both network types.
Multipoint conferencing products may be software-based or accelerated with special hardware, and their configuration can produce different bandwidth consumption patterns as well as different user experiences. For example, when an endpoint is used to host a multipoint conference, the maximum bandwidth for any single participant is the bandwidth allocated to that host divided by the number of locations participating. When you need to have more than four locations on a call at the same time, network-based products are recommended.
If you decide that your IP network can't handle the additional traffic associated with live video sessions in a merged or converged network deployment, your options are to rely on circuit switched networks or to deploy additional IP bandwidth capacity. To assist in determining and acquiring the exact bandwidth to meet your requirements...it's strongly recommended to make use of a free technical consulatation service such as is available via DS3-Bandwidth.com. An excellent guideline resource for video conferencing set-up and management is also available at "Video Conferencing Solutions".
About the author:
Michael is the owner of FreedomFire Communications....including Business-VoIP-Solution. com and DS3-Bandwidth.com. Michael also authors Broadband Nation where you're always welcome to drop in and catch up on the latest BroadBand news, tips, resources, and insights.
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Warning: Call-time pass-by-reference has been deprecated - argument passed by value; If you would like to pass it by reference, modify the declaration of xml_set_object(). If you would like to enable call-time pass-by-reference, you can set allow_call_time_pass_reference to true in your INI file. However, future versions may not support this any longer. in /mnt/web7/31/89/51742389/htdocs/videoconferencing/rss2.php on line 36
 FutureResume.com Takes Next Step in "Video Hiring" with GreenJobInterview.com, the Online Videoconferencing Solution ... (Business Wire via Yahoo! Finance)
NEWPORT BEACH, Calif.----“Companies have been trying to get online videoconferencing to really work for people for quite a while now. We think this is both the technology and the application to make it happen,” said Greg Rokos, president of FutureResume.com.
Digital Strategy 2.0 – Smarter through Digital (Scoop.co.nz)
“This Strategy provides a bold vision and concrete actions to help New Zealanders become leaders in the digital world.”
Concurrent Grand Jury Concerned Over Serious Overcrowding At The County Jail (The Chattanoogan)
Members of the Concurrent Hamilton County Grand Jury said they are concerned about serious overcrowding problems at the county jail. The report, read by Foreman Robert Smith to Criminal Court Judge Barry Steelman, said prisoners who should be kept apart are being intermingled.
Fun learning for teens (The Camrose Canadian)
Submitted East Central Health Teens in central Alberta learned about asthma this summer, through a fun new activity using video conferencing technology. With a successful session held earlier this summer, a second session was planned for Aug. 18.
Satellite Hub supports mobile networks in hostile areas. (ThomasNet)
Tested to MIL-STD 810F standards, Series 12200 Universal 4-Slot Industrialized Hub enables network operators to implement and manage mobile satellite network in field. It hosts multiple inbound and outbound networks on up to 4 different satellites and enables on-the-fly deployment of complete satellite networks to meet mobile connectivity needs. Hub can deliver mobile broadband connectivity, ...
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