Production plan of various modems

Production plan of various modems – A modem is a hardware device for receiving and converting data transmitted by various communication methods. The modem converts data received from Internet Service Providers (ISPs) into data that can be used by mobile phones, laptops or other network equipment. For example, an ADSL modem receives connection data via a telephone cable (RJ-11) and, after adapting it to the configuration performed on the modem, provides the Internet platform.

The name of the modem is taken from the beginning of the words Modulator and Demodulator (Modulator and Demodulator) and initially they only had the role of modulating and demodulating the signals in a connection, but since then the use of the modem has changed a lot. Therefore, the name of the modem has only a historical background and does not specify its actual use.

Modems can be divided into two general categories, internal and external. Internal modems are modems that are integrated with the processor, or a separate chip inside devices such as mobile phones and laptops. Your mobile phone has an internal modem that provides your internet connection to mobile operators – such as Irancell and Hamrah Aval -. External modems are standalone devices that provide the Internet for other devices. The connection method and its infrastructure vary according to the type of technology and application of the modem.

ADSL modem

It is one of the most widely used and common methods of connecting to the Internet, which has a diverse structure for communication. The ADSL modem is connected to the telephone network and finally the ISP (Internet Service Provider) using the telephone port or the RJ-11, and after confirming the configuration information, creates the necessary conditions for connecting to the Internet. Network data transmission via two wired ports using the LAN port or RJ-45 and wireless is done by WiFi technology.

VDSL modem

How VDSL modems work is very similar to ADSL modems, except that the data transfer route from the ISP to your home or workplace is done using fiber optic technology. As a result, the bandwidth and speed of network communication is much higher than ADSL technology. VDSL technology was forgotten due to lack of proper support and coverage throughout the country.

WiMAX modem

WiMAX technology is the first platform to provide Internet without the need for a telephone line in the country, which is widely available to users. This network technology was founded in 2001 and had a bandwidth of about 30 to 40 Mbps. In 2011, the latest version of WiMAX called WiMAX2 + was introduced, which increased the bandwidth to 100 Mbps. In fact, WiMAX 2 Plus is known as the main competitor of TD-LTE technology, which we will introduce the WiMAX competitor in the following. Mobinnet is known as the first WiMAX internet provider in Iran and after that Irancell started operating as a competitor. With the advent of 4G Internet and its sub-branches, as well as the high price of WiMAX Internet, over time we have seen a decrease in Mobinnet and Irancell users in the WiMAX sector. At present, Irancell has stopped supporting this technology due to its very low acceptance and has focused on TD-LTE connectivity.

3G / 4G LTE modem

How to connect users to the Internet through 3G and 4G modems is based on mobile and wireless services. The difference between the two in terms of speed and bandwidth can be provided by the fact that mobile service providers provide the necessary conditions for providing third generation or fourth generation mobile internet by placing several transmitter stations (BTS). 4G LTE technology came in different versions, each with different bandwidth.

TD-LTE modem

4G LTE modems offer the desired technology in portable and mobile devices, which can be referred to as new smartphones and dedicated modems. But TD-LTE technology is actually a fixed version of LTE technology and can only be used with dedicated modems. TD-LTE technology is sent and received by the 20 MHz frequency band.

Modems play a very important role in networks, whether small home networks or large networks. Nowadays, especially in home networks, devices that only act as modems are no longer used, but now the modem and router features are combined and presented in the form of modem-router. That’s why your ADSL modem can connect multiple cell phones, laptops, and …s simultaneously over wireless and network cable (which is essentially a router), as well as the security features of a router.

What is the use of a modem?

Modem One of the ways to enter the world of the Internet is a hardware device whose job is to convert digital signals to analog and vice versa. The modulator section in the modem converts digital information output from a computer (audible sounds) to analog signal to It is possible to send them via telephone line, DSL or cable. The Demodulator section of the modem converts analog input signals into digital signals for use by the computer.

In fact, modems enable computers and routers to send and receive information over networks such as the Internet. Using a modem is the key to entering the world of the Internet and the World Wide Web, online commercial services, email, and bulletin board systems (BBSes). Some ISPs also offer modems as part of their ISPs. . But you can also buy the right modem separately.

Types of modems in the justification plan for the production of modems

In the past, modems were large, heavy devices that needed to be connected to a telephone line to make a connection. After the rise of the Internet and its widespread use in homes in the 1990s, modems came in two forms: internal cards for desktop computers and USB adapters for laptops. The advent of broadband cable Internet, which enabled speeds in excess of 56 kbps, led to the production of external modems in the 21st century.

In general, the types of modems fall into three categories:

pc card
Internal modems
As the name implies, these types of modems fit inside your computer system. In fact, this modem is located as a separate and integrated chip on one of the internal slots of the computer case inside the device. This chip is often installed on the device from the beginning. For example, a mobile phone has a built-in modem that provides an Internet connection through mobile operators. It should be noted that internal modems are more compatible with the computer system and do not require special attention.

This component starts working as soon as the internet connection is activated and terminates if the connection is lost. Internal modems are cheaper than external modems, but this price difference is often small. The most important problem that users have when using modems. The interior is facing it, it is their location. Because they are located inside the computer case, when you want to repair or replace an internal modem, you have to open the case of the computer case and replace the modem.

External modems

An external modem is a device that independently connects systems to the Internet.

Features of external modems

The installation of an external modem is easier because it is independent and does not require a physical connection inside the device case.
They have their own power supply.

They are connected to the computer via cable or Wi-Fi, and a cable from the telephone line is connected to a socket in the modem.
You can turn off your modem if you do not need internet.
You can easily upgrade the security of your wireless modem.
Because its power supply is separate from the system, it does not use the device’s electrical energy.
Despite the modem lights, you can see the status of your Internet connection.

pc card in the production plan of various modems
Designed for use on laptops and about the size of a credit card, these modems fit into the PC Card slot in notebooks or desktops and can be unplugged when you do not need one.

PC Card modems are a combination of internal and external modems. They are located directly inside a laptop port, so you do not need a cable to connect it, you only need a cable to connect to the telephone line.

These cards supply the electricity they need from the device to which they are connected, which, when used in laptops, reduces battery life.

The difference between a modem and a router
The router creates a network between the computers of a home, while the modem connects that network, as well as the computers on it, to the Internet. When a user connects to Wi-Fi, he or she is actually connected to the router, which generates traffic between the Internet and the computer. Many Internet developers offer a hybrid modem / router device that works both on the same device. The modem is usually used in people’s homes and connection endpoints, but the router in the communication center. But in summary, the difference between a modem and a router is as follows:

The modem decodes a signal from an ISP, but the router does not decrypt from an ISP.
The modem can connect directly to the Internet, but the router needs a modem to connect to the Internet.
The router creates and manages WiFi, but the modem is not responsible for WiFi.
The modem does not create a local area network, but the router can.

Different parts of a modem

A modem consists of many parts, each of which has a specific task. Some parts of a modem are:

Power supply: The function of this part of the modem is to convert the mains voltage to the voltage that the modem circuits need.

Chip: This part converts continuous digital or analog signals in two directions. It should be noted that if the modem does not have this part, it needs a large number of transistors.
Processor: The processor is the center of a modem and its task is to control all parts of the modem.

How the modem works to Production plan of various modems

Computer systems are digital and telephone systems are analog. To transfer information, various and continuous systems must be used. To exchange information between these two devices, we need a modem device. The modem connects to the telephone line on one side and to the computer on the other. The modem works by receiving digital signals from a computer and then adding them to analog signals (this is called modulation), then these signals can be transmitted over the telephone line.

Status of active modem production units

The following chart shows the number and capacity of modem production units in the country by province.

Import and export status of modems

The chart below shows the amount of imports and exports of different modems in the country by province.
Types of modems common in the market
1- ADSL modem
Using an ADSL modem is one of the most common ways to connect to the Internet. The modem communicates with the Internet server using a port connected to the telephone network, and the Internet connection is enabled when the server confirms the configuration information.

Data transmission in the network is done wirelessly (wirelessly) and using wires (using LAN port).

The best-selling ADSL modems in the Iranian market are D-Link and TP-Link brands.

2- VDSL modem
In VDSL modem, the connection speed and network bandwidth are very high, in this technology, data transfer is done using fiber optics from ISP to your workplace or home. This model is not common now due to the fact that fiber optics are not covered and supported everywhere in the country. The data transmission path in VDSL modem is using fiber optic technology.

3- WiMAX modem
The first platform to provide the Internet, without the need for a telephone line in the country, was the use of WiMAX technology. This technology supported 30 to 40 Mbps bandwidth. WiMAX was introduced in 2001 and 10 years later its latest version was introduced in 2011 as WiMAX2 +.

The first company to offer this technology in Iran was Mobinnet, and after that Irancell came to power. But after a while, due to the high price of this technology and the low popularity it received from users, it announced that it did not support this technology and replaced all WiMAX modems with TD-LTE modems for free.

4- G / 4G 3 LTE modem
3G, 5G wireless internet is provided in mobile phones. In order to transmit data in this network, it is necessary to have transmitter stations (BTS) that operators try to increase the number of these stations according to the competition in the service platform in order to increase their coverage, speed up the process. Forgive and provide the necessary conditions to provide the third generation or fourth generation Internet. The difference between the different versions of G4 LTE is in their bandwidth.

5- TD-LTE modem
The TD-LTE modem is similar to the LTE modem, except that it is a fixed version of this technology. TDLTA technology can only be used with dedicated modems and data exchange is done at a frequency of 20 MHz. TD-LTE technology is in fact a fixed version of LTE technology.

An ADSL modem can connect multiple devices such as laptops, TVs, cell phones, and so on over a wireless or network cable. presented.

Summary of technical, financial and market study of the justification plan for the production of various modems
Annual production capacity: 86 thousand units
Dollar exchange rate: 25,000 Tomans
Required land area: 2500 square meters
Total infrastructure: 1400 square meters
Number of manpower required: 26 people
Fixed investment amount: 18 billion Tomans
Value of machinery and equipment: 11 billion tomans
Internal rate of return: 40%