Voip Service Providers, Internet phone service provider

What is ISP?

ISP literally means Internet service provider (ISP) or provider (supplier). This is a service (in most cases pay) that can connect to the Internet.

Why Use an ISP?

Unless you have a dedicated line (in addition to the phone line), you can not connect directly to the Internet using only the telephone line. In fact, the phone line was not designed for this:

• This was originally designed to transfer "voice", ie a frequency modulation in the range of tones of voice
• Phone servers only serve to start a conversation from a phone number
• Unless you use a special service, it is usually impossible to have more communication between two points ...

Then, the Internet service provider is an intermediary (connected to the Internet via specialized lines) that provides Internet access through a number that is entered using the modem and allows to establish the connection.

How your ISP provides your Internet connection?

When the connection to the Internet through a service provider, the communication between the computer and the ISP is established using a simple protocol: PPP (Point to Point Protocol), a protocol that allows two remote computers to communicate without having an IP address.
In fact, your computer does not have an IP address. However, one of these IP addresses is necessary in order to access the Internet, mainly because the protocol used on the Internet is TCP / IP protocol that allows a large number of computers located using these addresses to communicate.

Therefore, the communication between you and your service provider is established according to the PPP, which is characterized as follows:

• Telephone
• Initiation of the communication
• Check the username (login id or user)
• Checking the password

Once connected, the ISP provides a static IP address which is preserved during the Internet connection. However, these addresses are not fixed because the next connection the service provider will provide one free of their addresses (and thus will be different, since according to their ability a provider may have several hundred thousand addresses).
The connection is therefore a proxy for connection is the service provider who sends all the requests that are made and who gets all the pages that were requested before returning to the applicant.

That is why, for example, when you have access to the Internet via an ISP, you must download the email in each connection, it is usually because the service provider who receives the email (it is stored in one of servers).

Differences between ISP

Choosing an ISP depends on several criteria including: the number of services offered and their quality. What, then, these criteria?

• Coverage: Some ISPs only provide coverage in large cities, others offer national coverage, ie a number which is the cost of a local call regardless of where it is called
• Bandwidth is the total speed offered by the ISP. This bandwidth is shared between the number of subscribers, so the greater the number of subscribers, the lower the bandwidth (the bandwidth allocated to each subscriber must be greater than its transmission capacity to be able to provide The service is of good quality)
• Price: This factor depends on the ISP and the type of package chosen. Some ISPs now offer free access
• Access: unrestricted: Some ISPs offer a package where we consider the connection time, ie can not exceed a certain number of hours of connection per month. If this occurs, the charge for the call receives an increase in the price (additional minutes are very expensive). Some providers even offer without subscription fees, ie, you pay only for the communication (but, obviously, this is more expensive than a local call)
• Service: This is a team dedicated to responding to technical problems (also called "technical support" or "Customer"). ISPs usually charge for this service (sometimes called by € 1.35 and then 0.34 € / min)
• Additional Services:or quantity of email addressesor available space to create a personal page (HTML)or ...
  

Understanding of the different packages on offer

The Internet Service Providers (ISPs) offer subscription rates and packages for accessing hierarchically categorized Internet ...
Internet Free Internet without subscription; very tempting, but how can such free offers?

• Paid subscription with unlimited access
• This is the traditional package. Is to pay a flat fee each month (approximately 10 to 30€). With this package Internet access is unlimited, ie you can connect as much as you want during the month ... only pay-per-call charges (the cost of a local call).
• Such a package usually provides (or more) email addresses, as well as space to build a personal page Paid Subscription access
• This type of package has the same features as the previous package, with the difference that this subscription is more economical, but the connection time is limited. Use outside the defined time period increases the cost per additional.
• Access to the Internet without subscription
• Warning! This service is not free ... Can connect only occasionally paying for access with a higher cost of call per minute. It is only appropriate for people who connect to the Internet infrequently (a few hours a month) and does not include benefits such as space for a personal page (however, free accommodation is available excluding ISP).
• Internet Service Providers Free
• How can these companies offer free access?
• Advertising allows companies to offer such packages. In fact, since they are connected, you can see several banners.

Resources on this item

The Web site Providers (providers) can compare the different packages on offer. Grenouille.com is also a useful website to find predictions of the Internet, ie the velocity that is observed in real time on high speed lines for Internet service providers.