Connectivity of computers via phone line networks or wireless networks is possible with the help of the devices called modems. These electronic products have improved in terms of design and functionality, starting with modems used for terminal-to-computer connectivity in 1960s to the GPRS and GSM available presently. Today, there are a variety of modem designs that make connectivity easier for the computer and mobile users.
You may be looking for modems to setup networks at your office. If you own a store offering networking products, you need to entertain the needs of different modem buyers. Here is a discussion about the basic functionality and importance of different types of modulation-de-modulation devices in use these days.
How Do They Work?
Modems are the electronic products that perform two related functions – modulation and demodulation. As a modulator, these devices convert the digital signals of computers into analog signals that can be transmitted over phone lines. As a demodulator, modems convert the analog signals into digital signals at the receiving end. In this way, connectivity is established between two ends.
In the case of wireless modems like GSM, the digital signals are converted into radio signals and vice versa for transmission. It is worth mentioning that different modems are capable of sending and receiving data at different speeds, usually measured in bits per second. The following sections discuss the most important types.
External and Internal Units
The most common classification of modems is in the categories of external and internal modems. As the names suggest, the external modems are separately attached to the computers and other devices to establish connectivity. On the other hand, internal modems are integrated within the chips installed in these devices. External modems can be further classified into dial-up modems, cable modems and DSL modems. Internal modems have popular sub-types in the form of dial-up and wireless modems.
Voice-band and DSL Modems
The traditional modems that were restricted to the voice band frequencies of telephones have given way to the DSL and ADSL modems. These new-age modems are capable of transmitting data at higher speeds and within wider range of frequencies. These modems offer connectivity through digital subscriber line and for many other popular services like virtual private networks and voice over internet protocol services. The DSL modems also act as DSL routers that help in establishing networks of computers within a designated area.
Radio and Wireless Modems
With the rise in wireless connectivity, the importance of GSM, 3G, Wi-Fi, GPRS modem and other similar models has increased. These devices make mobile communication possible for the users of mobile phones and laptops. Moreover, the designs like GSM modem have additional features like integrated SIM cardholder and memory slots for enhanced functionality. For example, sending and receiving SMS is possible with the help of these smart electronic devices. In short, these networking units can support services in the categories like internet connectivity, data transmission, voice transmission and so on.
Modems are extremely important electronic products with digital connectivity completely reliant on them. Make your store a useful resort for different buyers by offering them modems in different designs.
Author has wide knowledge of B2B Marketplace and Business industries. For latest business updates on electronic products like gsm modem and and digital display boards, visit online business directory Dir.IndiaMART.com