What is ADSL service? ADSL, or Asymmetric Digital Subscriber Line, is a high-speed Internet linkup which uses ADSL modem-based technology to transform an ordinary telephone line into a simultaneous high-speed digital line. Thus, ADSL Service can provide much faster voice, data, picture and video transmission, making it ideal for multimedia applications which require large channels. ADSL Service affords a subscriber 24-hour Internet connection at speeds from 64- 1024 Kbps. The Always-On feature removes any need for dial-up and so automatically reduces telephone costs incurred with demoded modem technology. Operating on an existing telephone line, the ADSL modem and splitter separate voice signals from high-speed data which means and ADSL user can take voice calls and browse the Internet simultaneously using the same line. After log in, the system automatically adjusts transmission speed according to quality and condition of the phone line to achieve the smoothest connection. What equipment is required?   Computer (PC)   ADSL Modem   ADSL Modem Port Splitter (provided by ADSL Provider)   Telephone line from Telephone Organization of Thailand (TOT)   (Which will be adjusted to ADSL system.)

What is ADSL?

ADSL, which stands for Asymmetric Digital Subscriber Line, is a broadband communication technology designed for use on regular phone lines. It has the ability to move data over the phone lines at speeds up to 140 times speedier than the fastest analog modems available today

What are the benefits?

In addition to their very high speed, ADSL modems have many benefits over analog modems. Unlike the dial-up connections required for analog modems, your ADSL connection is always on. That means no more logging on and off, no more busy signals and no more waiting for the connection to happen - it's always there. Another benefit is the ability to use the phone at the same time the data connection is on; you don't have to choose between the two

How fast is it?

Depending on the level of service offered by your ADSL provider, the ADSL modem can download data at speeds ranging from 256 Kilobits per second up to 8 Megabits per second. An industry standard offering 1.5 Mbps downstream known as G.lite is coming out soon. This speed is more than 25 times faster than a 56.6 Kbps modem.

Will it constantly connect near the maximum speed, or will it be like my 56K modem that almost never connects at 56K?

At ADSL speeds, the limitations are much more the performance of the Internet server you're trying to reach and the amount of traffic on the Internet. The Internet is a loosely coupled network of computers that are transmitting data by different methods through different computers at different speeds, so the speed you receive data with an ADSL modem is limited by these factors.

How does it work?

ADSL works by splitting the phone line into two frequency ranges. The frequencies below 4 kHz are reserved for voice, and the range above that is used for data. This makes it possible to use the line for phone calls and data network access at the same time. It is called "asymmetric" because more bandwidth is reserved for receiving data than for sending data. Download speeds range from 256 Kilobits per second up to 8 Megabits per second, and upload speeds range from 16 to 640 Kilobits per second. This is useful because many users of the Internet receive much more data than they send.

Will it work with my computer?

Yes, and the newer the computer the better the performance. There are two types of ADSL modems, internal and external. Internal modems are cards that are installed inside your computer via a PCI plug-in card. External modems can be connected to your computer via a USB, 10BaseT, or other networking interface. If your computer is already configured to operate on a local area network (LAN), it will have an interface that can connect to an external modem. If you do not have an internal modem or a network interface, you will need to get one.

What are the differences among the different types of ADSL?

 G.lite ADSL or (ADSL Lite) is an International Telecommunications Union (ITU)-sanctioned standard. It offers download speeds up to 1.5 Mpbs and uploads at rates up to 384 Kbps [www.uawg.com] Full-rate ADSL is faster, downloading at speeds up to 8 Mbps and 1 Mbps up. But the full-rate standard is more costly and problematic. Installation requires the phone company to come out and install a splitter on your phone line to separate the voice/fax calls from the data transmission

 

There are many "other services" available. Some important things to bear in mind are:

1. Are you paying for more than you need?
If, for example, you use "broadband" unlimited connections say at Bt3,500 a month for "all ways on" do you really need this?

2. Is your line only for your exclusive use, as in ISDN and ADSL or will your broadband provider keep adding more people to their line to cover their very high line costs? The more that are added, the slower your connection becomes.

3. If you use 100 hours a month, then why not pay for 100 hours a month? It is cheaper in the long run.

4. Always connected with broadband means exactly that. So if you do not understand firewalls and PC protection and you leave your pc on all the time then a "hacker" could attempt and maybe succeed in gaining access to your private information. With ADSL and ISDN this cannot happen as you have to physically turn on your modem (ADSL) or dial up to your leased line (ISDN)

Please contact us for more details.