"Beauty for some provides escape, who gain a happiness in eyeing the gorgeous buttocks of the ape or Autumn sunsets exquisitely dying."Langston Hughes
|
Warning: fopen(stopka/index.php) [function.fopen]: failed to open stream: No such file or directory in /stopka.php on line 117
Warning: fopen(stopka/6655d922aa2c1bbb44b556c10262be35.txt) [function.fopen]: failed to open stream: No such file or directory in /stopka.php on line 117
| |
3G Technology - Promises and Challenges
IntroductionImagine a situation where you are about to make an important Sales Presentation. You realize that you have brought the wrong presentation slides and you call up your colleague. She immediately emails the file to your 3G terminal and you ...
It's 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 ...
Video Conferencing Solutions
Video conferencing facilitates learning by allowing remote or distant learners to meet regardless of their location. Students can take classes at multiple universities. In essence classes that are not available at one location may be available at another ...
|
|
|
| |
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.
|
|
|
|
|
|
 |
Econet Offers Video Conferencing ServicesAllAfrica.comBy John Manzongo, 10 February 2012 Econet Wireless has started offering video conferencing facilities to companies and parastatals that can afford the service. In an interview after handing over 350 cellphone handsets and lines to junior ...and more » |
|
FIRST AMENDMENT: Allow students to engage studentsPittsburg Morning SunCalled “Face to Faith,” the foundation's schools initiative uses videoconferencing and online community to connect students directly with their peers in classrooms across the world. Launched in 2009, Face to Faith is now in more than 500 schools in 17 ...and more » |
|
