طريقة معرفة ايميل و مواليد أي حساب في فيسبوك عبر تيرمكس - setan tool

 ✅ Learn about DSL technology

 In its early days, the Internet was used to transmit electronic messages and small-sized computer files that contain text only.

The modem usage of 14.4 kbps was sufficient for that stage to connect the user and the network.

With the spread of the Internet, the amount of information that is downloaded over the Internet has increased greatly, which may contain text, pictures, sounds and videos.

Although the modem speed increased to 56 Kbps, the development of Internet use also added to watching TV stations, listening to radio stations and transferring large files, making this speed not possible. This led to the development of a technology that allows the user to communicate over the telephone network at the speed he needs. And at an affordable price, this technology is called digital subscriber line (DSL).

Digital Subscriber Line (DSL) technology

Known as "Fast Internet", it is a high-speed communication technology designed to be used with ordinary copper telephone lines.

Where telephone wires are used to connect to a special device in the exchange called DSLAM, which in turn connects to the company's Internet service provider's devices using fast information transfer technologies such as optical fibers.

And the types of digital subscriber lines differ according to their speed, and the most famous of these types are:

Asymmetric digital subscriber line (ADSL):

 

ADSL is an acronym for Asymmetric Digital Subscriber Line

And so named because it allocates a large part to sending data to the user, while a small part is used to receive data from the user, meaning that the speed of receiving data is not equal to the speed of sending it.

And this type is widespread among Internet users in homes and offices.

Digital Symmetric Subscriber Line (SDSL):

 

This type is characterized by the fact that the speeds for downloading and uploading of information are equal, each reaching 2 Mbps.

And this type is widely used by companies and institutions that provide their services through the Internet, where the speed of downloading and uploading is of equal importance.

High Speed ​​Digital Subscriber Line (VDSL):

 

It is characterized by a very high speed, which can reach 56 Mbit / s, and can be used for high-quality television broadcasting and transferring very large electronic files.

High data digital subscriber line (HDSL)

 It is one of the oldest forms of DSL that provides symmetric transmission technology over copper wires (twisted-pair cable).

 Maximum speed of 2 Mbps

Among the great features of this technology:

 

1. It does not operate the telephone line, it can be used both simultaneously and at the same time, due to the different range of frequencies used by both dial-up and Internet access.

2. The speed is up to 2 MB / s and more.

3. The cost of establishing the system is relatively low due to its reliance mainly on the same scheduled copper telephone lines without the need to purchase, install and maintain new equipment and wires with the associated effort and cost, as well as the operational cost is also minimal. 4 Continuous and uninterrupted service

✅ What is ADSL?

ADSL subscriber lines are a broadband connection or a high-speed Internet connection that depends on dividing your landline phone signal into two, one for voice "for making calls" and the other for data. This service is available at multiple speeds and prices according to each company providing that service.

ADSL is known as a form of digital subscriber line DSL, and it is a data exchange technology that transmits data through copper telephone lines faster than a traditional voiceband modem by making use of unused frequencies in telephone calls.

It also takes advantage of telephone frequencies to the maximum in order to be able to deliver the customer to the highest possible speed in connecting to the Internet, which is of course much faster than the fax speed, "a regular telephone line if it is connected via a fax card to a computer directly", whose traditional speed is 56 k / s while ADSL speed is between 10 and 40 times, and you will not be able to use your landline phone while you are connected to the Internet via a fax card because the line is used with one signal.

 How does ADSL work?

It takes advantage of the copper wires used in the old telephone services and this technology uses "normal operating telephone lines" for the ordinary users and the business sector (especially those in small offices and home offices).

Among the devices used in ADSL technology is a microfilter or splitter that allows one phone line to use ADSL service and phone calls at the same time, as it separates the phone line into two ranges of oscillations, one for sound and the other for information (this is called synchronization).

 The ADSL is distributed over short distances from the central, typically less than 4 kilometers (2 miles), but it can be distributed over a distance of more than 8 kilometers (5 miles) if the size of the wire diameter allows for a further distribution.