Title:

Toll Free Conference Calls

Word Count:

577

Summary:

Conference calls are a convenient method of communicating with a lot of people all at once. Technologies today allow many different types of conference calling.

For a small business, simple 3-way calling may suffice. This feature is available through your telephone company and whatever long-distance rates you have on the phone that originates the call will apply.

When several people located in many different places need to access conference calls, a conference call comp...

Keywords:

conference, call, toll, free, pricing, business, calls

Article Body:

Conference calls are a convenient method of communicating with a lot of people all at once. Technologies today allow many different types of conference calling.

For a small business, simple 3-way calling may suffice. This feature is available through your telephone company and whatever long-distance rates you have on the phone that originates the call will apply.

When several people located in many different places need to access conference calls, a conference call company can provide this service.

A basic conference call service offers audio conference calls (also called teleconferencing) over the telephone. Usually, you have the option of toll-free calls or flat-rate calls.

“Toll-free” is sort of a misnomer because “toll-free” does not mean it’s entirely a free call because the person or business that hires the conference call company pays for the service.

Toll-free conference calls are free for the participants. With toll-free packages, participants use a toll-free number to dial into the call via the conference call company.

The charges for the calls are usually by the minute for the length of the call. In many cases, the more minutes used, the less money per minute it costs. For instance, one package may offer 1,000 toll-free minutes for $70 or 7 cents a minute. If you go over 1,000 minutes, each additional minute would cost 7 cents. Another package may offer 10,000 minutes for $400 or 4 cents a minute and 4 cents for each minute over 10,000 minutes. You can see the cost goes down with the larger packages.

A flat-rate conference call package requires the participants to pay their own long-distance charges. They dial a regular phone number to access the call via the conference call company. The company who hires the conference call company also pays a flat fee to set up the service.

The conference call companies always offer features that augment their basic service. For example, you can have the conference call company record your conference calls and then provide a playback. The playbacks can even be on-demand so people can hear them at any time 24/7.

As you might imagine, conducting a live conference call with dozens of people on the line at once could get a bit out of hand with everyone talking at once and noise in the background as well. Technology comes to the rescue with mute buttons that allow the moderator and/or operator to control what is broadcast on the call.

The operators at the teleconferencing companies can assist you in many ways. In addition to connecting participants as they call in to access your conference, operators can even call participants and then connect them to your call. Operators can attend the entire conference call, providing opening announcements, introductions for host and speakers, moderating question and answer sessions and making closing comments at the end of the call.

Audio conference calls are not the only options available to you. Web conferencing is another type of conference call that utilizes access through participants’ computers. Participants are able to view PowerPoint and whiteboard presentations and to share documents. Communication among participants can be audio or via chat formats. Upgrades of web conferencing services include application and desktop sharing, remote control and video conferencing.

As you can see, there are many ways that businesses today can communicate effectively via conference calling. There are lots of conference-calling companies to choose from and the competition among them drives good bargains for business owners who will take the time to do a little research to find the best bargains.

Title:

Antenna - How One Works

Word Count:

539

Summary:

A simple English explanation of just what happens inside your TV or radio antenna that allows it to pick up signals and transmit them to your receiving device.

Keywords:

antenna

Article Body:

It's probably not something many people are interested in unless they're some kind of an electrical engineer or just bored, but understanding how an antenna works can be useful when the one on your TV or radio goes south on you and the reason is beyond your comprehension.

Trying to explain how an antenna works in simple English is not an easy task as there are a lot of technical specifications that need to be explained. But a general understanding is possible without getting into tech speak that would make Einstein cringe.

In order for an antenna to work it has to radiate. Your antenna, whether TV or radio has what is called free electrons running through it. It is these free electrons that vibrate. The question becomes, how do these free electrons vibrate and what causes them to vibrate?

Well, in real life it takes an electric field to move an electron. If you take an isolated straight dipole, the power comes from the combined fields of all the charged particles, both positive and negative, in the antenna. We'll call this field the antenna's coulomb field.

In addition to this field, the antenna exhibits a magnetic field that is the sum of the magnetic fields of all the free moving electrons. The antenna also has a dynamic electric field that is the vector sum of the dynamic electric fields of all the free electrons. What we can do is separate the electric field of the antenna at any point in space into two components. One of the components will be in phase with the total magnetic field and the other will be 90 degrees out of phase. The in-phase component is the radiation field of the antenna and the out of phase component is the induction field. At the antenna, both fields are parallel to the metal surface.

What happens is that the coulomb field and the induction field fall off much more quickly than the radiation field as the distance increases from the antenna. When you reach distances greater than a few wavelengths from the antenna, you have what is called the antenna's far field. This field is pure radiation. As you get closer to the antenna you have what is called the antenna's near field. This field is a mixture of radiation, coulomb, and induction fields. Still with us? Great, we're getting to the good part.

What ultimately happens with all these fields that makes it so that your TV or radio picks up signals through your antenna is this. The free electrons moving through your antenna are moving at their maximum speed. The right hand half of your antenna accumulates electrons. The left hand half of your antenna is where the electrons depart and leave an excess of charged ions. The coulomb field produces an imbalance and opposes the electrons' rightward motion. The electrons then stop, coast for a bit and then head back towards the left. After they reach maximum speed they then stop and process is repeated, now heading back to the right. The result is a vibration of free electrons that heats the metal and in turn generates electromagnetic waves.

And that, in as simple English as possible, is how your antenna works.