For some people, the internet has become one of the basic needs. Not only for communicating, the internet helps the learning process, supports business development, is an unlimited source of information and also serves as entertainment.
Now, the modem is becoming one of the devices that is not foreign anymore along with the increasing need for the internet at home. Modem stands for Modulator and Demodulator. Both show the functions that run in a modem. How the modem works can be explained by understanding these functions.
The modulator is in charge of converting the information signal into a carrier signal so that it is ready to be sent. While the demodulator is in charge of separating the information signal that contains data or messages from the carrier signal so that the information can be received properly.
With these two tasks in one device, it can be concluded that the modem performs a two-way communication function. A modem installed on a computer or laptop is used as an intermediary to connect a computer or laptop to the internet network.
Knowing the Types of Modems and How They Work
Along with the development of technology, the types of modems are increasingly diverse, getting smaller in shape with simple designs and at increasingly affordable prices.
Here are some types of modems on the market and the technology used in how these modems work:
• GSM Modem (Global System for Mobile Communication)
GSM modem is one type of modem that is currently in demand by internet users. GSM modems are as small as a flash drive, easy to remove and easy to carry around. As the name suggests, the internet connection on this modem uses GSM technology, namely GPRS, EVDO, HSPA and several other technologies.
A modem that uses a GSM network has a wider range than a modem that uses a CDMA network. However, GSM modems have less stable connectivity because data and cellular access use the same line, while CDMA modems have more stable connectivity because data and cellular access are separated.
• CDMA (Code Division Multiple Access)
Modem Like GSM modems, CDMA modems are also favored by internet users. This modem also has a small size like a flash drive so it is easy to carry and remove. Unlike a GSM modem, a CDMA modem uses a CDMA communication line on its internet connection. CDMA communication in our country consists of two frequencies.
The first frequency is the 800 MHz frequency used by cellular operators Esia, Fren, Flexi, Starone and Mobile 8. While the second frequency, the 1900 MHz frequency, is used by Smart cellular operators. Devices that are used on the 1900 MHz frequency cannot be used on the 800 MHz frequency, and vice versa.
• Cable Modem
In the use of this modem, internet connection is made via a cable TV network. In using this cable modem, the computer must also be equipped with an Ethernet card. The use of this cable modem allows users to enjoy unlimited internet connection.
This means that the internet connection cannot be turned off at any time as is the case with other modems and can be used by several computers at once. This advantage is also a weakness, especially for those using cable modems who have children. Children have unlimited freedom to use the internet so they need more supervision from the adults around them.
• ADSL (Asymmetric Digital Subscriber Line) model
This modem uses telephone cable technology to transmit power at high speed. An example of ADSL technology users in Indonesia is Speedy internet service provider. Although both use telephone cable technology such as a Dial Up modem, the ADSL modem has several differences.
The ADSL modem distinguishes the frequency of internet and telephone connections so that when the internet is used, telephone activities are not disturbed. ADSL modem also has a higher speed compared to other modems.
However, this modem also has some drawbacks, such as internet connection speed which is affected by the distance between the modem and the computer and the distance between the telephone line and the telephone substation. In addition, rain also has a bad effect on telephone wires, which ends up making the internet connection slower.
• Dial Up Modem
As with the ADSL model, the Dial Up modem uses a telephone line for internet connection. In the use of this modem, the telephone line cannot be used simultaneously with the internet connection because it uses the same line. In addition, dial-up internet connections have lower speeds and are more expensive.
Tips for Choosing a Modem and Internet Service
• Don't be tempted by low prices
Intense competition in internet tariffs is also accompanied by offers of modems at low prices. The combination of the two then results in offering cheap modem packages that tempt potential consumers.
You should not be easily tempted by offers like this. Keep in mind the quality of the modem you want to buy so that the modem is durable in use, does not get hot easily and has a fairly high after-sales price.
• Ease of setting up the modem
In general, every modem has almost the same settings. But there are some modems that are not equipped with supporting software and the appearance of the settings is not satisfactory so that it confuses users, especially ordinary users. For this reason, you should choose a modem that is equipped with installation and use instructions as well as the necessary supporting software.
• Able to run on all operating systems operating
Two systems that are often found on laptops or computers are the Windows and Linux operating systems. For that, choose a modem that can run on both operating systems so that at any time when you switch computers you will not experience difficulties.
• Adjusting to the situation
Not only about the price, the modem and internet service used should also be adjusted to the situation. Modems and internet services that are expensive and good may not necessarily be used optimally in your area.
It could be that the signal in your area cannot be obtained optimally so that the connection runs slowly. For that, you should choose a modem and internet service according to the circumstances. Look for complete information about the signal coverage area so that the purchase of a modem is not in vain.
• Warranty
When buying a modem, also ask about the warranty. Do not underestimate this because the modem will be used for daily activities. With a clear warranty, it will certainly make it easier if a problem occurs at any time.
Choosing a modem and internet service is not easy. There are many promises offered by modem manufacturers and internet service providers, but still many consumers complain and are disappointed.
In order to avoid this, pay close attention to the modem and internet service that you want to use. Hopefully this information can be used to understand how modems work and finally make the right choice.