Whether my broadband cat is normal or not, please take a look at it

As long as it doesn't affect the Internet, it's normal.

1. Under normal circumstances, to install broadband Internet access in our home, we need to use two devices: wireless router and cat. However, it is not necessarily required, and it is directly related to the type of broadband service you handle and the demand for use. 2. If your home broadband is the best line and optical fiber access, then you must use the cat (optical modem) device to access the Internet.

However, you don't have to spend your own money to buy a cat, because at present, major broadband operators will give away or rent cats for you for free when you handle broadband services. When broadband is the best line and optical fiber access, you need to use the optical modem Tips: Now some users apply for broadband, and the operator will provide a network cable that can access the Internet to the user's home.

If your broadband is connected to the home network cable, then you don't need to use the cat device. 3. The main function of wireless routers is to allow more computers and mobile phones to share broadband Internet access. Because if you only have a cat, you can only use one computer to access the Internet.

So, usually, after installing broadband, we need to buy a wireless router; Connect the wireless router to the cat home broadband network cable, and then set the router to connect to the broadband Internet access. After the wireless router is successfully configured, multiple computers and mobile phones can access the Internet at the same time. Use a wireless router to provide wifi Internet access4. Finally, don't ignore the network cable; The number of network cables is directly related to your usage.

If you use a cat for broadband and have a desktop computer, you'll need at least 2 network cables. One network cable connects the router and the modem, and the other network cable connects the computer and the router. If you don't use your broadband and you have a desktop computer that needs to access the Internet, you can prepare 1 network cable.

If you don't have a desktop computer, you don't need to prepare a network cable. Prepare a network cable to connect to the computer, router, and cat Problem summary: (1) If your home's broadband is ** line and optical fiber access, then you must use the cat device.

If your broadband is a network cable to the home, you don't need the cat as a device. (2) If you have multiple computers and mobile phones that need to access the Internet; Well, you should prepare a wireless router. (3) In addition, according to your use environment, prepare 1-2 network cables.

Broadband cats are called modems, affectionately called "cats" according to the homonym of modem.

1. **Modem:

Through the first online network, the sender converts the digital signal into an analog signal through modulation, and then converts the analog signal into a digital signal through demodulation at the receiving end.

2. Fiber modem (fiber modem):

Optical modem refers to a transceiver device that converts optical ethernet signals into signals of other protocols. Optical modem is a common name for optical modem, which has the role of modem. Fiber modem, also known as single-port optical transceiver, is a product designed for special user environments, using a pair of optical fibers for single E1 or single or single 10BaseT point-to-point optical transmission terminal equipment.

The equipment is used as a relay transmission equipment for the local network, and is suitable for optical fiber terminal transmission equipment of base stations and leased line equipment.

At present, one of the main access methods of home broadband is more stable and faster than network cable access.

1. Difference in appearance.

Figure 1 and Figure 2 above are the comparison charts between optical fiber modems and ordinary cats, and the difference between the two can be clearly seen through this comparison chart.

2. Differences in principle.

The optical fiber modem converts the optical etheric signal of the optical fiber into an electronic signal that can be recognized by the computer. Ordinary cats convert the analog signals in the ** line into electronic signals.

3. The particularity of access is different.

Optical fiber is not like the first line can be bent at will, in the project optical fiber routing is generally not allowed to go 90 degrees of right-angle bend, so do not bend and squeeze the optical fiber at will after the optical fiber arrives at home. If you look closely, you will find that the bend of the house will try to maintain a bend of more than 120 degrees.

Broadband cat is actually a transliteration of broadband modem cat is a transliteration of the word.

It means wideband modem.

In fact, it is the device that your home has given you for broadband telecommunications.

Modem is the abbreviation of modulator and demodulator, Chinese called modem (Hong Kong and Taiwan call it modem), according to the homonym of modem, affectionately called "cat". It is a device that converts a digital signal into an analog signal through modulation at the transmitter end and then converts the analog signal into a digital signal through demodulation at the receiving end.

It's the small box that the network company installs for you when you pull the network cable at home, and then you pull the network cable out of the small box.

An optical conversion module. Broadband access is optical fiber can not be directly connected to the computer, with this you can plug in the upper end of the optical fiber, the lower end of the network port plug in the network cable to connect to the computer to achieve the Internet function. Some broadband cats come with their own voice interfaces, which can expand business installations.

With this kind of device, operators can manage network users more conveniently. The picture is voice-enabled, and there are smaller and more concise ones.

A cat is also known as a modem and is a device that converts signals.

Modem: The scientific name is modem, and its main function is to convert analog signals into digital signals or digital signals into analog signals. There are now three ways to access broadband:

ADSL, community metro network broadband, fiber exclusive broadband. There are two of these three ways to use cats: fiber broadband and ADSL broadband.

Therefore, the optical modem is just a way of broadband cats.

Optical modem, also known as single-port optical transceiver, is a three-piece optical fiber transmission equipment developed for special user environments. The device adopts a large-scale integrated chip, simple circuit, low power consumption, high reliability, complete alarm status indication and perfect network management function.

Chinese name:

Modem.

Product Name: modem

modem, in fact, is the abbreviation of modulator (modulator) and demodulator (demodulator), Chinese called modem (Hong Kong and Taiwan called modem). According to the homonym of modem, it is affectionately called "cat".

Broadband modem is used to dial up the ADSL provided by Telecom, what is a broadband router.

1. As you know, a router is a device that connects the network of the unit and the network or the Internet of other units, and the broadband router is a device that supports a variety of broadband access methods and allows multiple users or LANs to share the same account to achieve broadband access.

After 2000, not only home computers and commercial computers began to enter a large number of home and office user groups, ADSL, VDSL, CM, FTTX+lan and other broadband access methods have also sprung up in China.

2. The emergence of broadband routers solves the increasing broadband application needs of broadband users with low investment and provides convenience, which generally has 1 or even 2-4 WAN interfaces, can automatically detect or manually set the access type of broadband operators, can be connected to ADSL, VDSL, CM, FTTX+LAN and other broadband access, has PPPOE virtual dial-up or DHCP client function, can be assigned a fixed public IP address, etc.

When you have a broadband router, all computers in the LAN no longer need to install any client software, nor do you need to set any ** server address to easily share broadband Internet access.

3. In addition, it generally comes with a 2-4 port switch, which can easily realize the access of a small local area network, and the broadband router with its own strong performance can share the Internet with about 100-200 machines.

4. Broadband cat is used to provide ADSL dialer router for telecommunications, but can not replace the cat, if it is a pull of optical fiber, do not use the cat, only use the router can, the cat is a modem, analog and digital signal conversion, the router can not convert which, the router can be set to help you dial the number, connect to the Internet, you can provide router functions to the computer so that the computers can access each other".

However, there is a "routing cat", which can be simply understood as a routing + cat, if a computer uses a ** online network with a cat. One with a double bridge cable to get two computers on, using a router.

Cat is a common name, cat is a modem, ADSL dial-up Internet access needs to use cats. It is the ADSL client device connected by the computer and the ** wire, which is a small square with four small lights on it, and the ** line is connected to the computer through it, and it is called"Cats"(Chinese pronunciation of modem).

Desktop Internet access must use cats, laptop Internet access without cats, can use wireless network Cats are used to convert Internet signals If there is wireless network around, the laptop can be connected directly to wifi.

Cat is a colloquial name.

It should be a modem.

Laptops and desktop computers, if you dial-up the Internet, you need to use the cat to convert the data, use the account and password given to you by **, dial-up the Internet.

The "cat" in broadband connection is the homonym of modem, and Chinese means modem, which is a kind of computer hardware. If you use a desktop or laptop computer to access the Internet, you need a "cat".

It can translate the computer's digital signals into pulse signals that can be transmitted along ordinary ** lines, and these pulse signals can be received by another modem at the other end of the line and translated into a language that the computer can understand.

The information in the computer is composed of digital signals composed of "0" and "1", while the transmission on the ** line can only be analog electrical signals. Therefore, when two computers want to transmit data through the first line, a device is needed to be responsible for the conversion of digital to analog.

Current modems are very mature in terms of adaptation, data compression, and network coding modulation technology. The data transmission of each channel can be as high as 56kbps, which is basically close to the theoretical maximum rate of the ** line.

Simply put, it's the device that connects the ** cable.

If you want to use a laptop, you'll also need wireless routing, which is structured as follows:

**Wire> Cat > Wireless Routing.

The laptop can only be connected to a wireless router to access the Internet (of course, you can also plug in the network cable directly).

Broadband inside. Cats, that's modems.

Whether it is a desktop or a laptop to surf the Internet, you need a cat, that is, a modem, but there will be a built-in cat in the notebook, depending on the specific machine model, or the configuration manual. The main is to do the signal analog or digital conversion.

The cat is a modem that is used to dial up the Internet to the computer.

Broadband modem is a modem, a device that communicates between computers through a ** line. Modulation and demodulation process: digital signal becomes analog signal - > transmission - > analog signal becomes digital signal.

Moden has external and built-in, and the built-in type is also called Moden card, which is generally a PCI interface. Also called adsl. Now there are more broadband cats on the market, such as Swift, Huawei, Bell, etc. . .

In general, as long as you register network services with Telecom, except in a certain province. Telecom will send you a cat. The setup of ADSL is not very difficult, just follow the method and steps on the manual to install it.

Now the "cats" on the market are basically directly installed and used directly, and there is no need to set them up separately. Huawei MT800-B has been on the market for a long time, and now Huawei has another **, and the market price this year has been stuck at about 120 yuan. Recently, in order to compete for the National Day market, some merchants sold this product at a low price of 48 yuan.

If you want to buy ADSL modem, don't miss it. The MT800 is designed with a pure white plastic shell and has many heat dissipation holes on the body, which is also used as a decorative function for heat dissipation, making it a compact and beautiful ADSLADSL modem with classic design. It provides an Ethernet interface and a built-in voice splitter, which provides convenience for users to access the Internet and connect to the machine at the same time.

This adslmodem may be small in appearance, but it is very functional. It has an uplink rate of 896Kbps and a downlink of 8Mbps, supports routing, bridging, NAT (NAPT) and DHCP Sever, and supports Bridged Ethernet over ATM (RFC 1483), Classical IP over ATM (RFC 1577), PPP over ATM Protocol (RFC 2364), PPP over Ethernet ( RFC 2516) protocol) At present, there are many brands on the market, commonly known as 4-mouth cats and photo frame cats, which are being promoted, with a downlink rate of up to 15m and will not be dropped. In addition, the built-in isolation firewall function supports powerful IDS and IP address filtering functions to effectively prevent network hacker attacks, which is very practical for users who form small networks.

At present, Telecom vigorously promotes a FTTH fiber to the home or FTT B type, the cat in the form of ADSL has been gradually eliminated, optical fiber broadband has a fast and stable network speed, and is now at the forefront of the country, E8-C cats are also known as optical cats, there are Huawei HG8245 and ZTE F401 and F420 without the user to buy it themselves, all of which are sent by Telecom, and some provinces pay a deposit for 2 years and return it to the user.