Difference between Cable and DSL Internet

Question : What is the difference between Cable and DSL Internet?

DSL sends data faster than it receives data and is not easily accessible in rural areas. Both cable and DSL offer packages that vary in price depending on connection speeds. Basic DSL plans feature speeds that start at 1 kilobyte per second and increase up to 3 megabits per second. Cable plans generally start with speeds of 1.5 megabits per second and increase up to 5.0 megabits per second.

Another major difference between cable and DSL is price. As cable Internet service is faster than DSL and as a result is three to four times more expensive. Cable Internet is generally bundled with telephone and cable TV service.

One advantage of DSL plans is that it allows users to access a steady Internet connection. Unlike cable, the DSL connection speed remains the same regardless of the number of users accessing the service. Bandwidth availability is affected while using cable Internet service when there are a large number of users accessing the Internet. This results in slow service and transfer speeds.

What is difference between DSL and ADSL?

Question Asked : What is difference between DSL and ADSL? What type of connection is commonly used in India? (Question asked on my Youtube Page) 

Asymmetric digital subscriber line (ADSL) is a type of digital subscriber line (DSL) technology, a data communications technology that enables faster data transmission over copper telephone lines than a conventional voiceband modem can provide. ADSL differs from symmetric digital subscriber line (SDSL).

ADSL works by utilizing frequencies that are not used by a voice telephone call. A splitter or DSL filter allows a single telephone connection to be used for both ADSL service and voice calls at the same time. ADSL can generally only be distributed over short distances from the telephone exchange typically less than 4 kilometres, but has been known to exceed 8 kilometres if the originally laid wire gauge allows for further distribution.

At the telephone exchange the line generally terminates at a digital subscriber line access multiplexer (DSLAM) where another frequency splitter separates the voice band signal for conventional phone network. Data carried by the ADSL are typically routed over telephone company's data network and eventually reach a conventional Internet Protocol network.

Thus the upload signal is weakest at the noisiest part of the local loop, while the download signal is strongest at the noisiest part of the local loop.

ADSL is a type of DSL where the upstream and downstream speeds differ (hence the "asymmetric" part). There are many variations of DSL technology for different types of application (HDSL, SDSL, etc). 

ADSL

ADSL is a broadband connection technology which utilizes existing copper wired telephone networks. ADSL uses a wide range of frequencies over an existing telephone line to deliver much higher speeds than standard 56k modem (between 10 and 140 times faster). It is also possible to use your phone while online. 

DSL

DSL stands for Digital Subscriber Line. Generally if you have a DSL connection, you are getting it right from the phone company. DSL is more like the older 'modems' in that they do use the standard copper phone lines that are in your house. DSL requires that there be a special switch installed at your local phone company's main routing station. DSL also has a limitation of a 4 mile radius. One of the cool features of DSL is that you do not need to have a 'special' line installed - you can be surfing the internet and talking to someone on the phone all on the same line. This is because DSL uses a high frequency that does not affect the normal use of your phone. 

There are two commonly type of DSL, DSL (also known as SDSL) and ADSL. DSL or SDSL is the more expensive, but offers the most bandwidth. The S in SDSL stands for Symmetric or synchronous, which means that the bandwidth of both upstream (sending data) and downstream (receiving data) are the same speed. The actual speed you get depending upon the package you sign up for, and how far away from the switch you are. The most common speeds are 256k (256kilobits)/second and 1Mb (1megabit)/second. ADSL (Asynchronous Digital Subscriber Line) is the same as SDSL, but the upstream bandwidth is smaller than the downstream. This version of DSL is generally more affordable than SDSL. Common ADSL speeds are 256kb downstream - 96kb upstream, 1mb downstream - 256kb upstream.

DSL was developed and patented in 1988 by Bell Communications Research, Inc. The main advantages of DSL at the time were the speed it offered and the fact that, for the first time, it allowed people to use Internet and phone service at the same time. The main disadvantage was that the digital signal's strength decreased as distance from the provider's central office increased.

Although it uses the same wiring as previous technologies, DSL sends information digitally. This greatly increases the amount of information that can be sent at once. ADSL is the most common type of DSL connection. 

Note :

• The opposite of ADSL is SDSL, which stands for symmetrical digital subscriber line. 
• SDSL provides a high-speed data connection that gives equal priority to upload and download speed. 
• Other types of DSL include Internet protocol subscriber line, rate-adaptive digital subscriber line, Uni-DSL and Etherloop.

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How to change Hard Drive in Lenovo G570 Laptop (Hindi) (1080p HD)

Now it is better option to improve your laptop by replacing the hard drive with a SSD or hybrid hard drive which is faster, quieter and save more energy, while recovering your system and your data. By putting Operating system on an SSD, the startup and shutdown will be faster, as well as the reaction of your system will be increased. 

Specifications of Lenovo G570 Laptop are as follows :

• Processor : Intel Core i3-2310M or Intel Core i5-2410M processors
• Display : 15.6 inch
• Graphics : Intel HD Graphics 3000
• RAM : 4GB DDR3
• Storage : 500GB hard disk drive
• Battery : 6-cell

Lenovo G570 can be equipped with a Blu-ray drive instead of a DVD reader/writer.

Transfer your system files or Data on new SSD or hybrid hard disk

Use cloning software that comes with the SSD to copy of your original hard drive onto the SSD. You can copy your software, settings and documents to new SSD. Steps as follow : 

• Step 1) Turn off your computer and connect the transfer cable to the SSD.
• Step 2) Plug the other end of the cable into a USB port of your computer. Start your computer and insert the disk with cloning software included with your SSD.
• Step 3) Boot from the CD. To do this, right from the start, press the F1, F2, F12 or Del depending on your computer. A message is typically displayed on the screen. In the menu that appears, select your CD with the arrow keys and press Enter. The computer boots from the CD. Click on Accept.
• Step 4) Click the Let’s Get Started. Initially select the source disk, that is to say, the internal hard drive to your laptop and click Next.
• Step 5) Then select the destination disk, that is to say the SSD and click Next.

Now that you have copied your entire system and your files on the SSD, you are ready to replace your hard drive with SSD in your laptop. 

How to install Hard Drive in Lenovo G570 :

On the bottom of your Lenovo G570 laptop, find the hard drive door to access the hard drive.

• Step 1) Loosen four screws securing the cover on the bottom. Lift up and remove the cover.
• Step 2) Remove two screws securing hard drive caddy to the laptop chassis. Slide the hard drive assembly in the direction opposite to the SATA connector and then carefully lift it up in order to remove it from drive bay.
• Step 3) To separate the hard drive from the caddy you will need to remove four screws that fix these two parts together.
• Step 4) There could be an Aluminium adhesive tape between both parts making their disassembly more difficult so be careful. You will have to transfer the mounting bracket and Aluminium hard drive shield to the new SSD.

After replacing the HDD you will have to reinstall the operating system and transfer important data from older Hard Drive to new one.

There is second way to install other hard drive in Laptop :

You can use HDD Caddy to replace the DVD-Drive from the Lenovo G570 series for a second hard drive (or SSD). Add a second hard drive to your laptop using your laptop's optical drive. This device can fit in a "standard" optical drive bay found in laptop computers. Simply pull out your DVD drive and replace it with our optical bay hard drive caddy. 

You have to remove DVD Drive and plug the adapter (plus hard drive) in slot.

How to install RAM memory in Lenovo G570 :

Both memory modules can be accessed on the bottom of the laptop.

To remove any currently installed memory module just spread the latches in the direction opposite to the memory slot. The memory module will pop up at about 45 degree angle and can be safely removed from the slot. (As shown in Video)

Lenovo G570 can take up to 8GB RAM. You can install up to 4GB RAM module into each slot.

Lenovo G570 use RAM of PC3-10600 DDR3 SDRAM SODIMM 204 pin.

Note : Lenovo G570 has to run a 64-bit OS to be able to use all 8GB RAM.

Note : Before you begin any procedures, turn off the laptop, unplug the power adapter and remove the battery. Laptop parts are very sensitive to static electricity so ground yourself before touching anything inside you laptop by using grounding strap or touch a metal pipe.

You can use SATA2 or SATA 3 SSD, as both will work at the same rate, as your interface is SATA2, but the advantage of the SATA3 is that you can use this drive in the future in another laptop that does have the SATA3 interface, thus it will give greater speed in that laptop. SATA2 interface has speed of 3Gbps while SATA 3 uses 6Gbps.