Connection using docsis 3.0 technology. Cable modem: characteristics, how to choose and connect. DOCSIS connection technology

24.05.2024

Over Cable or DOCSIS is an international telecommunications standard that allows data transmission to be added to an existing high-bandwidth coaxial cable television system. This is important for both Internet users and Internet providers because it allows you to increase Internet speeds without replacing coaxial cable networks. On a practical level, consumers will need to know which DOCSIS standard is needed when purchasing a cable modem.

Modem Connection Basics

DOCSIS allows the use of cable connections to serve high-bandwidth applications. It was created in March 1997. During this period, it went through several stages of improvements. The system includes a modem located at the user's premises, as well as devices located elsewhere, usually at the central station of the provider company or at an intermediate node.

There are two main components of DOCSIS: the physical layer (PHY) and the media access control (MAC) layer. The physical layer refers to the wiring and routing equipment used, and the transmission of data across these various physical systems. In general, faster transfer speeds mean better performance. However, there are several limitations in terms of physical distance.

These restrictions affect the areas where a DOCSIS 3.0 cable modem and other infrastructure can be installed, which affects their speed and price. The MAC layer is designed to intelligently manage the vast amount of information being processed at any time, allowing for a critical level of organization that prevents frequent traffic jams caused by opposing signals.

The evolution of Internet transmission speed

Overall, there have been three different major iterations of DOCSIS over the years: 1.x, 2.x, and 3.x. The original specifications 1.0 and 1.1 had an operating limit of 38 Mbps for transfer speeds and only 9 Mbps for speed increases. As technology evolved over the next few years, it was necessary to organize operations so that cable providers had greater flexibility as speeds improved and service levels increased. This led to the creation of DOCSIS 2.0 in 2002.

DOCSIS 2.0 did not introduce new features to reduce network speed, but it tripled the speed, allowing 30 Mbps connections. The most significant changes occurred in 2008 with the introduction of DOCSIS 3.0. This new iteration was a format that significantly increased speeds to 1.2 Gbps and 200 Mbps respectively. This was a huge leap, with DOCSIS 3.0 including the introduction of channel communications.

It allows you to assemble or combine multiple channels downstream and upstream with improved speeds across the entire range. With a channel connection, the more channels present, the better. So, installing 16 channels downstream and 4 upstream or 16x4 provides fast speed, and a 24x8 system even faster.

Latest Integration Standard

In 2016, DOCSIS 3.1 was released, which led to a sharp jump in speeds, including in the downstream direction. This iteration brought speed packages of up to 10 Gbps and 1 Gbps, respectively. Today, work is already underway to develop a new iteration, usually called DOCSIS 3.1 Full Duplex. This version will support symmetrical 10 Gbps up and down speeds.

It is inevitable that DOCSIS Cable Modem will continue to evolve to accommodate new technologies and user requirements around the world. Consumers should stay on top of these changes to ensure they can upgrade to cutting-edge models in a timely manner.

As 4K and UHD become more common for both wireless and wired networks, their options are increasing in terms of volume and convenience. Therefore, there are still many exciting developments to come in the DOCSIS field in the coming decades.

Buy or rent

If a user leases a cable modem from their ISP, purchasing is an option that will save them hundreds of dollars in rental fees over the life of the device. Some companies charge about $120 annually for rent, and given the low cost of modems, most will pay for themselves very quickly. Additionally, choosing a modem for your personal needs allows you to get the most out of your internet plan, and the network performs better than rental equipment.

Not every modem is suitable for all types of Internet services. Cable internet will not work with because they use different delivery methods. DSL uses the telephone's terrestrial infrastructure. If the ISP is also a landline phone carrier, you will likely need the appropriate type of DSL.

More advanced users recommend a modem and router combo if you need an inexpensive and compact replacement for a rental device. However, keep in mind that they do not give much control over the router. If one device breaks, both will need to be replaced.

How a cable modem works

It provides data transmission over cable television networks and can be connected directly to the TV socket. This places it between the user's cable connection and the computer. It can also be connected to a computer via USB or network cable. If the user wants to connect several computers, then in addition to the modem, a compatible router or a combined device is needed that will combine both functions.

The data sent by the computer must be converted into a suitable format in order to be able to transmit it on special frequencies via a television cable. Today, Internet providers mainly provide combination devices from a cable modem router, which allows you to connect via WLAN to the Internet.

Multiple devices with one IP

The ISP only provides one IP address. But a situation often arises when you need to connect several devices via WLAN in parallel to the network. This is possible if this IP address is not directly associated with the PC, but with a router that connects the internal network to the outside world. It works with a public IP address. However, the internal network uses a separate block of IP addresses.

In theory they range from 192.168.0.0 to 192.168.255.255. In practice they are almost always 192.168.1.1 or 192.168.1.50. Addresses starting with 192.168 are, by definition, always private IP addresses. Devices with the same IP addresses are located on many millions of small and large networks. Almost every personal router defaults to internal IP 192.168.1.1.

It is very important in what order the devices are turned on. First, turn on the cable modem and wait until the LED lights up, indicating that it is ready to start and connected to the Internet. Then the router is started. Experience shows that this happens a little faster than with a modem. Only at the moment when they are ready, the terminals connect to the network in any order: mobile phone, tablet, laptop, desktop PC.

Connecting and setting up the router

Setting up network equipment with routers is much easier today than before. Before you connect your cable modem, it's helpful to understand which type is best for a fast connection to avoid unwanted problems in the future. Connection to Motorola:

Open an Internet browser. In the address field, enter for Motorola routers: 192.168.100.1, for the modem: 192.168.0.1.
Press "Enter". Default username: admin. Default password: motorola, all lowercase letters.
Click “Login”. If you can't login with 192.168.0.1, try using 192.168.100.1.
Make sure that the username is: admin and the password is: motorola.
Make sure that the connected Motorola cable modem model begins with the letter “M”, example: MB8600, MG7550, MD1600.
Set the device to factory default settings. Here you will need a pin or a straightened paper clip.
This is done when the power is turned on. Find the RESET hole at the back of the device.
Press the RESET hole with a paper clip for about 25 seconds. Wait until the device connects again.

Home network with TP-Link AC1750

The high-performance TP-Link AC1750 modem (with DOCSIS 3.0, features a wireless AC router that supports a reliable home network. It allows you to stream 4K without slowing down. Now this incredible modem is priced slightly higher than budget models, but the difference in performance makes the price worth it indicators. Positive qualities:

Delivers up to 1750 Mbps Wi-Fi speeds with 16 streaming and 4 upstream channels.
The 2.4 GHz processor supports heavy online games.
Equipped with internal antennas and powerful amplifiers, it can enhance signal strength and reduce interference.
Has convenient settings.
The Motorola cable modem is compatible with most Internet service providers.

Even if users have problems with the setup, the support team is available 24/7 and ready to provide assistance.

Disadvantages of the model:

The web interface for managing settings could be more user friendly.
File transfer speed could be better.

Despite a few complaints, this device still has overwhelmingly positive reviews.

Moreover, it is a device that offers excellent performance at a reasonable price.

Optimal NETGEAR home model

The NETGEAR CM500 - 1AZNAS is a DOCSIS 3.0 based cable modem that provides speeds of up to 680 Mbps and is ready to handle a wide range of connection packets. This is the best budget model because it can give you incredible speed for under $70. It is compatible with various operating systems: Microsoft Windows 7, 8, 10, Vista, XP, 2000Mac OS. Can work with most major cable internet providers. Functionality - simultaneous execution of 16 downloads and 4 upstream channels.

Positive traits:

Supports 4k and HD video streaming.
Works up to 300 internet plans.
Speed up to 680 Mbps, 16 × 4-channel connection with DOCSIS 3.0 Gigabit Ethernet port.

Flaws:

The voice services included in the packages do not work well.
Does not work with Verizon, AT&T or CenturyLink.

ARRIS for fiber optic network

If a user uses gigabyte speeds on a fiber network, the Arris cm820 cable modem is the best fit for them, whether they are on a 1 Gbps network or not. This is one of the online gamers that also performs well among users who use huge data streams to download movies and games or simply need the latest technology.

Gigabyte Internet is the top of this model line. So, to enjoy all the advanced technology, you need to check with your provider whether they have fiber optic lines to provide services to your home. However, it should be noted that the maximum Internet speed will depend on the tariff plan.

Positive traits:

The fastest internet speeds with download speeds of up to 1.4 Gbps on fiber and 626 Mbps on cable. This is a true Arris Gigabit Cable Modem.
Internet speed is supported by 32 channels.
Is the latest DOCSIS 3.0.
IPv4 and IPv6 support.
Certified by most major ISPs.

The downside is that the LED lights are too bright and annoying.

If a person wants to enjoy all the benefits of fiber optic Internet, the ARRIS SURFboard SB6183 is the ideal modem. It comes with the best technology to help you optimize your gigabit subscription, but the main selling point is that it comes with a price tag under $100.

CPU - P4, 3GHz or faster.
RAM - 1 GB or more.
Hard drive - 7200 rpm or faster.
Ethernet - thousand BaseT).
Windows.
Ethernet connection - Windows 2000, Windows XP, Windows Vista or Windows 7 MacOS.
Ethernet connection - System 7.5 to MacOS 9.2 (Open Transport recommended) or Mac OS X,Linux/other Unix.
Ethernet connection - hardware drivers. Computers that do not meet this configuration will be able to run the CM820, but will not use its maximum throughput.

Budget model D-Link DCM-301

D-Link DCM-301 is the most affordable budget cable modem for home networks. In particular, it provides good speed and a simple design that works easily in a custom network setup. Plus, it's easy to pair with a cloud router or connect to a storage device for networking needs. Thus, among all the others in this range, this is the best choice of modem.

Positive traits:

Cheap and reliable for a $50 cost.
Uses DOCIS 3.0 technology, which is 8 times faster than DOCSIS 2.0.
Compatible with most Internet providers.
Easy setup.
Small design and doesn't take up too much space.
Available Internet speed taking into account its price: 343 Mbit/s.

Disadvantages: Some inconsistency in the connection, which is easily resolved with a quick reset.

Smart MG7550. If a user wants a small network layout, they will probably prefer a router. Since there isn't always room for cables and two separate devices, this makes a modem-router combo a good option. It is a good choice for the best router combination, has reliable network quality and supports gigabyte internet. The combined technologies of this device provide maximum WI-FI speed and provide streaming capabilities just like a Cisco cable modem.

Positive traits:

Compatible with most major internet service providers, including Comcast, XFINITY, Time Warner Cable, Cox and Charter Spectrum.
Fast and reliable speeds up to 686 Mbps 4 Gigabit Etherport, supporting ultra-fast Internet.
Easy to set up.

Disadvantages: The boost feature, which is supposed to provide a wireless signal anywhere in the home, often doesn't meet customer expectations.

Using the modem/router command has its advantages.

So while the Motorola Smart MG7550 with AC1900 may be a little pricey, it offers better transfer speeds and would still be ideal for a small apartment, home or office. Plus, this networking solution is great for gaming and streaming.

The new version of the DOCSIS specification - DOCSIS 3.1, completely changed the principles of DOCSIS operation, increasing the channel capacity by 50%, performance up to 10 Gb/s in the forward channel and up to 2 Gb/s in the reverse - speeds comparable to data transmission over fiber.

DOCSIS 3.1 provides more bits per Hz compared to DOCSIS 3.0 at the same signal-to-noise ratio

The DOCSIS 3.1 specification was released and successfully tested in laboratory conditions in 2015. At the beginning of 2016, 5 new cable modems supporting the DOCSIS 3.1 standard were certified, providers around the world began to implement and test equipment of this standard.

But what makes DOCSIS 3.1 unique compared to earlier versions, and how will testing methods change as a result? This article discusses the two main technologies used in the latest version of the specification: orthogonal frequency-division multiplexing (OFDM) and low density parity check (LDPC). The article also describes methods for achieving maximum performance levels.

Orthogonal Frequency Domain Multiplexing

The easiest way to understand OFDM is to remember how DOCSIS 3.0 works. There, one forward channel uses one carrier frequency with a bandwidth of 6 MHz (8 MHz in Europe). Single carrier QAM (SC-QAM) is used to modulate this frequency and symbols are transmitted strictly sequentially on this frequency. If problems arise with signal reception, then the modulation must be reduced - not only for this frequency, but also for all other channels in the network. This means that the modulation must be optimized for the worst part of the coaxial network.

Unlike SC-QAM, OFDM uses a bandwidth of 24 to 192 MHz. Within this band, up to 8 thousand subcarriers with a width of 25 to 50 kHz each can be placed. ( More precisely, 7680 subcarriers of 25 kHz or 3840 subcarriers of 50 kHz - approx. translator). All subcarriers are time synchronized with each other and form a single set of symbols. These symbols are in turn distributed across subcarriers and time slots and carry codewords.

The main advantage of this approach is that symbols are transmitted simultaneously at different frequencies. This creates some unique opportunities. So, if interference occurs on one subcarrier, OFDM simply eliminates it, combining adjacent frequencies. This allows data transfer to continue at optimal levels of performance. ( In addition, this transmission method is much less sensitive to narrowband and pulsed interference, since they affect only some subcarriers, whereas in the case of a regular signal, the interference affects its entire spectrum - approx. translator)

Since the modulation type in OFDM is set for a certain period of time, this technology allows you to control the mutual phase relationship of the subcarriers. If one subcarrier is at peak, then the adjacent one can be tuned out of phase, i.e. at zero. This reduces interference between adjacent subcarriers and allows them to use higher modulation levels and, accordingly, increase the overall network throughput. Instead of using one modulation level for the entire band, OFDM allows different modulation levels for each subcarrier. In addition, you can create modulation profiles in such a way that you can set individual modulation levels for all subcarriers and have several such profiles.

Modulation – SC QAM
Dedicated channels with 6 MHz bandwidth (8 MHz in Europe).
Each frequency channel is independent from the others.
Characters in one channel are transmitted sequentially.
Modulation is optimized for the worst part of the cable network.

Let's take one subcarrier as an example. Each profile has a different modulation level (for example, 64 QAM, 1024 QAM, 2048 QAM or 4096 QAM). OFDM may use the highest level profile for a given HFC network segment. In one segment it will be 4096 QAM, in another it may be 1024 QAM. In the third segment at this frequency there may be too much interference and this part of the spectrum will be completely excluded from the profile, etc.

Now let's look at what happens on this subcarrier to understand how all 8000 work. An individual profile describes an individual subcarrier in order to achieve its maximum performance in each time period.

As mentioned above, all subcarriers are combined with each other to jointly transmit symbols from which codewords are formed. Subcarriers are assigned to each codeword symbol and their modulation level is described by a profile. The profiles, in turn, are assigned letter designations (for example, A, B, C and D). Thus, it turns out that optimization is performed not only for each subcarrier individually, but also for all 8000 subcarriers in the complex.

Instead of optimizing modulation for the worst part of the network, it can be optimized for the best part at any given time. This makes DOCSIS 3.1 a much more efficient technology than its predecessors. Where a channel on DOCSIS 3.0 could carry 6.3 bits per 1 Hz, DOCSIS 3.1 can achieve 10.5 bits per 1 Hz using 4096 QAM modulation. In the more typical case where multiple modulation levels are used simultaneously, DOCSIS 3.1 can reach 8.5 bits per Hz, providing a 35% increase in efficiency without changes to the HFC network.

Low Density Parity Check

The improvements achieved using OFDM would not have been possible without the use of error correction algorithms. DOCSIS 3.0 uses a Reed-Solomon code forward error correction (FEC) algorithm and measures bit error rate (BER). BER refers to a single carrier, while OFDM uses many. Due to the fact that OFDM distributes the transmitted data over multiple subcarriers, the use of BER no longer makes sense.

DOCSIS 3.1 uses LPDC instead of FEC. This algorithm works over the entire range and evaluates errors not of individual bits, but of entire codewords. If such an error can be corrected, LPDC automatically does so, allowing higher modulation levels to be used and greatly reducing the need to retransmit codewords. LPDC brings channel capacity closer to the theoretical limits described by Shannon's theorem.

But LDPC has one drawback. Because this algorithm changes settings in real time, the system can achieve maximum power and modulation levels while correcting any errors that occur. This means that the network will degrade unnoticed by the operator and at some point errors will become uncorrectable, and users will notice a decrease in the quality of service. In order to avoid such a situation, it is necessary to test the system more thoroughly.

Achieving maximum network throughput

For testing to be successful, it is very important to understand what OFDM consists of. At the heart of everything is the PLC level - PHY link channel, which contains information on how to decode the OFDM signal. Without this layer, the modem will not be able to “see” the OFDM carrier and understand how to decode it. One level up is the next codeword pointer (NCP), which tells the modem which codeword to read next and which profile to use to decode each codeword. Next is Profile A. This is the boot profile that every DOCSIS 3.1 modem must be able to use in order to “understand” the higher levels of QAM modulation in other profiles.

Profiles are a simplified situation. For simplicity, we will assume that the profiles use the same modulation on all subcarriers.

The power, MER and noise levels in Profile A are selected for reliable OFDM performance. If this profile works, then standard profiles B, C and D can be used. Profiles different from them can be created by CMTS and cable modem manufacturers at their discretion and their number is not limited in any way.

When transmitting PLC level information, it is important to ensure that there are no uncorrectable codeword errors (CWE). At the PLC level, information transfer must be as reliable as possible, so the power level and MER must be strictly within a given range. To do this, the parameters of this level must be strictly fixed - the DOCSIS 3.1 specification limits the use of only BPSK or 16 QAM for PLCs.

If everything works without errors at the PLC level, the NCP parameters are also fixed and should not allow uncorrectable errors (CWE). If messages are lost at this level, the modem will re-request information or, even worse, there will be no connection at all. In DOCSIS 3.1, only QPSK, 16 QAM or 64 QAM can be used for NCP transmission.

Since profile A is bootable, it is assigned lower modulation levels than the others: QAM 16 and QAM 64. This is done so that all modems can operate even in the worst part of the cable network. A signal with a lower modulation level can operate at lower power levels and MER. Just like the two previous levels, profile A must have fixed parameters and not allow uncorrectable errors. If uncorrectable errors occur, the modem will go into DCOSIS 3.0 mode and there will be no increase in efficiency. Profile A can operate at higher modulation levels, while correctable CWE errors are allowed, this is normal, the main thing is that there are no uncorrectable ones.

Profiles are a real situation. OFDM allows certain subcarriers to be excluded and allows each to have different modulation levels for different subcarriers. This optimizes the overall channel throughput - each profile has its own exceptions.

When all 3 levels operate within specified limits, you can look at the total channel capacity. One of the mistakes at this stage may be measuring the signal level over the entire 192 MHz band. It must be remembered that the total power in this spectrum band is equal to the power of a 6 MHz signal, taking into account the bandwidth. Thus, the total power of an OFDM signal is very different from the power of a single carrier with a width of 6 (8) MHz. In order to more accurately tune the OFDM signal power, all levels must be measured relative to the power of the 6 MHz signal.

OFDM has several more unique characteristics. The levels of the first and last 6 MHz in a given OFDM signal band will be approximately 0.8 dB less than the levels of the remaining subcarriers due to the roll-off in the guard band. This becomes important when measurements are made using standard instruments or when power is being measured in a 6 MHz frequency range that is isolated from the general range. In addition, the PLC carrier is approximately 0.8 dB higher than other subcarriers due to the additional pilot signals and transmitted data. Thus, the overall flatness of the OFDM signal compared to a standard 6 MHz signal will fluctuate within 1.6 dB due to the initial and final rolloffs and the influence of the PLC.

For OFDM to operate at peak performance, average power levels must be within specified limits, MER must be good, and noise levels must be kept to a minimum. Noise greatly impacts the OFDM signal and can result in profiles with high modulation levels not being used at all.

If all the specified requirements are met, then it becomes possible to use profiles with high modulation levels. It is important that the parameters within the profile are locked. Profiles with high modulation levels may have some correctable errors (CWE) as this is not as critical as lower levels, but uncorrectable errors will result in maximum performance not being achieved. For example, if profile C has uncorrectable errors, profiles D and higher will not be able to use higher modulation than profile C. To achieve high modulation levels, the HFC network must be clean and free of uncorrectable errors (which is also true for earlier versions DOCSIS).

What's in Upstream?

DOCSIS 3.1 uses OFDMA – Orthogonal Frequency-Division Multiple Access for the return channel.

Individual subcarriers in OFDMA can be switched off to ensure backward compatibility with DOCSIS 2/3.0 channels

Comparison table between DOCSIS 3.0 and DOCSIS 3.1

Conclusion

DOCSIS 3.1 solves a major dilemma that has faced operators for many years: “Should I spend money on a complete modernization of my entire cable network or make incremental changes to my existing network?” Using OFDM and LDPC technologies, operators can significantly increase network capacity with minimal upgrades.

A small upgrade of the physical structure of the network is enough to increase its efficiency (speed and throughput) by 35% using DOCSIS 3.1. This will also give operators additional time to undertake further incremental upgrades, which in turn will enable them to further increase capacity.

However, operators need to be very careful when implementing and testing DOCSIS 3.1. If this is done incorrectly, then there will be no improvement over DOCSIS 3.0.

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So! Subtleties of buying a router:

If you're looking for the best Internet speeds for your home, cable Internet service is still a good choice for most users. But what most users don't know is that they sometimes pay much more than they should for cable broadband—especially if they use equipment offered by the cable company.

Indeed, many users can save up to $5 a month—that's more than $60 a year—on their current cable Internet connection. To that end, I've compiled the top five questions I typically receive from readers about cable Internet. I've included both short and long answers to each question, including suggestions for how to save money on your monthly bill (spoiler alert: buy, don't lease, your cable modem).

What Cable Modem Do You Really Need?
Short answer:

choose one that can support the speed of the tariff plan you subscribed to. When in doubt, choose one that supports DOCSIS 3.0. Of these, you should choose not the most expensive one, and to be sure, from the list of supported equipment of your provider.

Note: Your actual Internet connection speed depends on the speed of your modem, router, Wi-Fi connection, switches, and the user device itself, and by the way, on the tariff plan you have chosen. Most of the time, what you pay for is the lowest common denominator, and does not determine the actual speed of your Internet connection.
A cable modem is a device that receives an Internet signal from a cable provider and turns it into a data signal that can be understood by computing devices such as personal computers, tablets, or smartphones. The modem comes with a female coaxial connector - just like the one behind your HDTV - and a LAN port. This means that with a modem, you can only connect one computer to the Internet. To connect more devices, you will need to get a Wi-Fi router. (More on this below.)

Modems are usually very simple devices, and because of this, most of them are practically indistinguishable from each other. The biggest difference between them is the standard they support, which determines the internet speeds it is capable of supporting, both for downloading and uploading. This standard is called d ata over cable service interface specification, or DOCSIS.

Currently on the market there are DOCSIS 1.x, DOCSIS 2.0 and DOCSIS 3.0 modems. Both DOCSIS 1.x (basically a now obsolete standard) and DOCSIS 2.0 support only one channel, which supports download speeds of 43 Mbit/s and upload speeds of 10 Mbit/s and 31 Mbit/s, respectively.

In DOCSIS 3.0 (which is backwards compatible with older standards), single-channel speeds remain 43 Mbit/s download and 31 Mbit/s upload, but modems are now capable of processing multiple channels (channel bonding) at a time. A typical DOCSIS 3.0 modem typically offers four or eight download channels, resulting in speeds of 172 Mbps or 344 Mbps, respectively. For upload, they typically support four channels, offering speeds of up to 124 Mbps. DOCSIS 3.0 modems will appear relatively soon, which can handle even more channels.

Your actual Internet speed also depends on what you pay for; the faster you want, the higher the monthly payment. If you pay for an Internet plan with a download speed of 30 Mbps or less, there is a chance that a DOCSIS 2.0 modem will be enough for you, which costs almost half the price of a DOCSIS 3.0. Moreover, if your tariff is called: Light, Basic, Starter or Standard, then a DOCSIS 2.0 modem will probably be enough for you, but if you choose a higher level, such as: Turbo, Premier, Super or Extreme, then a DOCSIS 3.0 modem with four or even eight download channels are a must.

Please note that all broadband services offer much slower upload speeds than download speeds. Most of the time, most plans only offer upload speeds of 10 Mbps. In addition, you need to check whether the modem supports the DOCSIS standard and is on the ISP's list of approved modems, otherwise it may not work at all. In addition, sometimes you come across one ISP that does not allow the use of consumer modems on its network.

On a typical home network, you need to connect the modem to the WAN port of the Wi-Fi router using a (preferably) short network cable.

Rent or buy?

What Cable Modem Do You Really Need?
Whenever possible, it is better to purchase your own modem. This is a good saving over time.

Note: Your actual Internet connection speed depends on the speed of your modem, router, Wi-Fi connection, switches, and the user device itself, and by the way, on the tariff plan you have chosen. Most of the time, what you pay for is the lowest common denominator, and does not determine the actual speed of your Internet connection.
When you register a request to connect to a cable Internet service, the provider often includes a modem in the service package. This device is usually not free; it costs you monthly rent. Often, the provider does not clearly inform you about this when concluding the contract, and also that you can avoid this by using your own equipment. This modem rental fee may not be that high at first, but then it usually increases and sometimes reaches $10 per month, which may not be entirely interesting to you.

This doesn't seem like a lot of money, but over time it doesn't add up to much. And if you plan to use the Internet for one year, it is much better to purchase your own modem, which costs between $50 and $100, and new. You can buy one before signing the contract or any time after that. In the latter case, make sure you return the modem provided by the service providers, or else you will be charged for it. From my personal experience, it is better to bring this device and return it in person to the nearest customer service center to avoid losing it.

Even if you plan to use the Internet from this operator for a short time, it is still a good idea to purchase your own modem. You can always use it again for a new connection, as long as the connection type is the same, or sell it and get most of what you paid for it back.

Continuing the conversation about selling an old modem, you can also purchase a used one.

New, used, or returned?

Short answer:
It never hurts to buy a brand new modem, but you can also save a lot without losing anything if you buy a used one or after a return.

Note: Your actual Internet connection speed depends on the speed of your modem, router, Wi-Fi connection, switches, and the user device itself, and by the way, on the tariff plan you have chosen. Most of the time, what you pay for is the lowest common denominator, and does not determine the actual speed of your Internet connection.
Cable modems are simple devices and after initial installation they are usually left alone and simply left in the same place. You'll never have to change settings or tweak anything again. Also, modems have no moving parts (most of them don't even have fans). Therefore, they can work for a long time and simply become obsolete before they actually stop working. This means that purchasing a brand new modem will not benefit you any more than receiving a returned modem of the same type.

In truth, the most common reasons for returning modems are either that they are no longer needed or that the appearance of the devices does not match the interior design. And from the inside they are practically no different from new devices. In many cases, the modem that the Internet provider offers you may just be returned, and this device was used by previous customers. On the market, when returned, modems cost up to two-thirds of the price of a new one.

Purchasing used modems involves a higher risk associated with previous owners. If the modem has not been dropped and there is no noticeable external damage, it should work well. However, if you buy a used one, make sure that you can return it after a few days because if it can work for a few days without any problems, then there is a chance that it will work for a long time. In turn, a used modem tends to cost about a third of the price of a new one.

From my personal experience, the most common thing that breaks in a modem is the power adapter, which is quite easy to replace.

The back of the cable internet combo device. You can see a lot of LAN ports and no WAN port, which is present in a regular router.

Should I buy a modem with a built-in router or two separate devices?

What Cable Modem Do You Really Need?
If your provider does not provide you with a free modem with a built-in router (which is unlikely), always just ask for a modem and purchase a router separately. After receiving the modem, just take one of the routers, not the most expensive one, according to your need. If you really want a combo device for practical reasons such as reducing cords, the Motorola SBG6782-AC Surfboard eXtreme is your best choice for now. Make sure you read his full review first.

Note: Your actual Internet connection speed depends on the speed of your modem, router, Wi-Fi connection, switches, and the user device itself, and by the way, on the tariff plan you have chosen. Most of the time, what you pay for is the lowest common denominator, and does not determine the actual speed of your Internet connection.
As mentioned above, you need a router to share the Internet connection from the cable modem on more than one computer; the total number is up to 254 devices for most routers. You just have to connect the LAN port of the modem to the WAN port of the router using a network cable. This is the preferred setup and also the most popular, as it gives you the flexibility and ability to customize your network based on your need and your budget.

Equipment	Behind	Against	The best choice
Separate modem and Wi-Fi router	Flexibility in price, features, performance features, flexibility to upgrade, replace with a new one.	More wires and two outlets needed	ISP approved modem and one of the top routers
Modem/Wi-Fi router two in one	One device, one outlet needed, fewer wires	Lack of flexibility, the built-in router is not always the best, difficulty in updating the device - it is more expensive and will have to be replaced entirely.	Motorola SBG6782-AC Surfboard eXtreme.

There are also combo devices that consist of a modem and a router in one box. I generally don't recommend them for two main reasons. First of all, it's dangerous. If any part of the device, modem or router module, is damaged or out of fashion and obsolete, you must replace the entire device. The second reason is that in most existing combination devices, the router portion is usually very limited, making your home network less flexible and functional than it could be.

If you run a business, try to avoid purchasing a combo device because the router portion of it likely won't have all the configuration options your business needs. A capable system administrator can still make things work fine by adding another router to the network, but that's a lot more work than just purchasing a modem and the right router outright.

Do I need to purchase an extended warranty?

No, it's not worth it. Cable modems (or combination devices), even those returned, usually come with a factory warranty ranging from 90 days to two years. Since these are simple devices, if anything unusual should happen, such as a defective device or you encounter problems installing it, it will happen immediately after purchase. After this, it is unlikely that something like this will happen.

Buying an extended warranty is simply a waste of money. Instead, it's better to use that money to buy surge protection for your home network devices, since power surges and lightning are two of the most common things that damage equipment. It is also better to install the device in an open area and where it is dry to avoid damage caused by water or overheating.

Should you try to reduce the price?

Definitely!!

It is true that most of us live in an area that is served by just one cable company, but there are other alternatives such as FDDI, satellite or DSL (which is available almost everywhere and is usually cheaper). You should use them as your leverage in negotiations with the cable company for a better deal. You can also get better deals by signing up for packages with multiple services such as TV, internet and phone, although don't sign up for anything you don't plan to use.

Some cable companies may give you a good deal for a period of time, such as six months, and then start charging you the full rate, which is up to 50 percent higher. You can always dial the operator or check the website when this period ends and ask about current or new promotions, or you can simply terminate the contract and then re-subscribe. It costs nothing and you already have a modem.

Most importantly, check back from time to time to see if there are new promotions or discounts, or simply call them to ask for a lower rate. It works. After all, you can't get what you didn't ask for.

That's all for now. If you still have questions, feel free to write to me at,

Cable Wi-Fi router Docsis 3.0 Technicol

RUB 1,500

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Cable Wi-Fi router Docsis 3.0 Technicolor TC7200.d For those who want to connect AKADO. Akado offers this router for RUB 3,990. Reason for sale - we use another operator, this equipment remains unused.

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Used equipment in excellent condition: Wireless Wi-Fi router НUAWEI HG8245H - 1800 rub. Wireless Wi-Fi SNR-CPE-W4N (rev.M) - 1200 rub. Wireless Wi-Fi router D-Link DIR-615/A - 800 rub. Wireless Wi-Fi router Netgear N300 IAD - 800 rub. Wireless Wi-Fi router Netgear N300 with USB - 800 rub. Wireless Wi-Fi router Netgear N150 - 300 rub. Cable modem Thomson TSM471 - 300 rub. Cable modem ARRIS Touchstone Cable Modem CM550 - 300 rub. Desktop switch TR-Link ТL-SF1005D - 200 RUR

Wi-Fi REPEATER to strengthen the signal ✔ Check out the assortment of our store by clicking on the link “BIGMAG – USEFUL GOODS STORE” under the ad. ✔ You can buy our products at retail and wholesale. FOUND CHEAPER - GET A MORE FAVORABLE PRICE FOR YOU! Come! Don't waste your time looking elsewhere! Wi-Fi REEATER to strengthen the signal =================================== Everyone has experienced insufficient Wi-Fi signal within your home or even apartment. A Wi-Fi repeater was created specifically to solve this problem, the main purpose of which is to expand the coverage area of the existing WiFi network. The meaning of its work is very simple, it intercepts the signal, amplifies it and transmits it further, significantly expanding the coverage area of your router. This gadget plugs directly into a power outlet and allows you to provide a reliable connection where there are problems connecting to a wireless network due to a weak or completely absent signal.

Features of the Wi-Fi repeater: - Expands Wi-Fi coverage area - Adds the ability to wirelessly connect to a cable network - Supports all modern encryption algorithms to protect your wireless network - Works with 802.11 b/g/n standards - Provides up to 300 Mbps transfer speed - Easy to set up Contents: 1. Wireless repeater 2. RJ-45 network cable 3. Instructions ============================= ====== OUR ADDRESS: Vokzalnaya Magistral, 2 (in the courtyard of the house) ✔ delivery throughout Novosibirsk - from 150 rubles. ✔ delivery within Russia - Russian Post, or a transport company of your choice ✔ if the product is not in stock, we will notify you of its arrival! ✔ special offers and promotions for regular customers! ✔ advice and assistance to every buyer! ✔ we work DAILY from 10-00 to 19-00 ✔ guarantee on all products ✔ low price policy! ☎ CALL RIGHT NOW and get advice on the product - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - EVEN MORE “USEFUL PRODUCTS” UNDER THIS AD! ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓↓ ↓ ↓ ↓ ↓ ↓

Technical features of Oriel 415D: Digital television set-top box Oriel 415D is designed to receive digital television and radio broadcasting in DVB-T2, DVB-C formats, and when connected using a Wi-Fi adapter (sold separately) IPTV, YouTube, Megogo functions are available. When you connect external media (flash drive, external hard drive), the functions of recording programs and the ability to play media files become available. - DVВ-Т2/Т/С standard - Program Guide - Teletext - Recording timer - Time Shift - Parental control - Viewing photos - Viewing video files - 2xUSB 2.0 with recording support - Plastic case - LED display - Control buttons on the case - External power supply 5V - Wi-Fi support (IPTV, YouTube, Megago, RSS) - - Other models are also available: - Cable/Terrestrial receiver Oriel 403D DVB-C/T2 - Cable/Terrestrial receiver Oriel 415D DVB-C/T2 - Cable /Terrestrial receiver Oriel 421D DVB-C/T2 - Cable/Terrestrial receiver Oriel 421UD DVB-C/T2 - Cable/Terrestrial receiver World Vision Premium DVB-C/DVB-T2 - Terrestrial receiver Delta Systems DS-750НD+ DVB-T2 - Terrestrial receiver Orenbox T2-07 DVB-T2 - Terrestrial receiver World Vision T64D DVB-T2 - Terrestrial receiver World Vision T64LAN DVB-T2 - Terrestrial receiver World Vision T64M DVB-T2 - Terrestrial/satellite receiver World Vision Foros DVВ-Т2/S2

Audio and video equipment

***Welcomes to the “RADIOLABKA” Store*** Our company has been on the market for more than 25 years. We offer a wide selection of equipment for digital and satellite TV (antennas, receivers, access modules), video surveillance systems (cameras, recorders), a wide selection of cable products, remote controls, accessories. We offer you the following product: Indoor high-performance directional panel antenna “WiFi AGENT” allows you to increase the range of receiving a Wi-Fi signal in a given direction, thanks to the built-in antenna and built-in Wi-Fi adapter. Allows you to access a remote Wi-Fi household or public network at speeds of up to 150 Mbit/s. Easy to install. Connection occurs via the supplied USB cable. If you have problems with automatic detection and connection of “WiFi AGENT” to your PC, use the included driver disk. Where it can be used: - At a camp site, in a hostel, in a sanatorium where WiFi is available at the reception, and in your room, at best, 1-2 network divisions are caught; - On a bench on the street, where across the road there is a cafe with free WiFi, which seems to be a stone’s throw away, but the level is not enough; - You live with relatives or friends in neighboring houses, you have WiFi, but for some reason they don’t and it would be great to transfer it to them wirelessly. Shop "RADIOLAVKA" Stavropol, Lenin St. 116 (crossroads of Lenin/Dobrolyubov St.) entrance from the yard. Mon-Fri 9.00 - 18.00, Sat 10.00-15.00, Sun – closed. Stavropol, Tukhachevsky St. 23/1 See the full range of equipment on our website below

Wi-Fi network equipment: Cable modem with Wi-Fi router Motorola sbg900e Cable modem with Wi-Fi router Thomson TCW750-4 Cable modem with Wi-Fi router Thomson TCW770 Modem, PCI interface speed 56 Kbps ass. timem D-Link modem DFM-562IS PCI in assortment FlexDSL modem fg-msdsl-mrn-e1b Genius GM56PCI-LA modem GSM Interion BGS2T-232 modem GSM/GPRS/EDGE Netkom ES75 modem GSM/GPRS/EDGE Netkom ES75 modem HDSL AirGain modem Campus-384 Tainet modem T-336Cx Modem Thompson TNG520 broadband, digital Modem xDSL D-Link DSL-2500U without charger Modem ZyXEL Omni 56K USB Mini EE Modem ZyXEL Omni 56K USB Plus EE Modem analog 56K PCI in assortment Modem external, analog 33.6K Modem external, analog 56K in assortment Satellite modem Comtech cdm-600 Satellite modem Paradise Datacom PD25 Universal satellite modem Hughes Network Systems 9100 Switch HP 40-0300704.06 Rev B 8-port 2 GB MSA San Fiber (P/N 410 738-001) Unmanaged switch D-link DES-1024R+ 10/100Mbit/s rackmount 24 ports Router H3C MSR20-10 Router Thompson TG605s 4wire Media converter Allied Telesyn AT-FS232 Fast Ethernet 10/100ТХ100FХ(SC) Media converter VDSL2 Р planetet VC-204 Single-fiber WDM media converter FE-C120S3.S20 10/ 100TX-100FX Router Motorola Symbol Power Injector 1 Por Switch 3Com VASELINE 2816 (3C16478) 16 ports Switch 3Com Vaseline switch 2024 (3C16471) 24 ports Switch 3Com Vaseline Sw itch 2250 (3С16476А) 48 ports Switch 3Сom OfficeConnect Dual Speed (3С16793) 5 ports Switch Switch h 3Com SuperStack 3 Switch 4924 (3C17701) 24 ports Switch 3Com SuperStask II (3С16441) 24 ports Switch 3Сom SuperStаsk II (3С16611) 24 ports Hub 3Сom SuperStаsk II 3С16670А, 12 TP ports, data transfer speed Up to 10/100 Mbit/s Switch 3Сom SuperStаsk II LinkSwitch 1000 (3С 16900A) 24 ports Switch 3Com SuperStac II RS Нub 40 TP (3С16406) 24 ports Switch 3Сom SuperStаsk 3 Switch 3300 ХМ (3С16988А) 24 ports Switch 3Сom SuperStаsk3 3300 (3С16980А) 24 ports Switch Сomrekh SAS2224В Switch HP Stora geWorks 4/8 SAN SWITSN (HSTNM-N005) Allied Telesis Switch AT-GS900/8E, 8 x Ethernet 10/100/1000 Mbit/s Switch D-Link DE-1500 12 ports Switch D-Link DES-1228 Switch_Nortel_Business_Ethernet_Switch 210-24T Switch_Nortel_Network s_BayStick_350-24T Switch Surecom EP-824DX, 24 x Ethernet 10 /100 Mbit/s Periodic replenishment of the assortment. See the entire range and prices on our RETECHNIKA website. Delivery by Russian Post. We are located: Montazhny Proezd 5t

Router ZyHel Keenetic Lite III A simplified version of the top-end wireless router ZyHel Keenetic Giga III. It belongs to the middle price category and is positioned by the manufacturer as a network device for building a mid-level home wireless/cable network with a 100-megabit connection from a cable Internet provider. The hardware of this model allows it to support stable Wi-Fi connections that meet the 802.11b/g/n family of standards. At the same time, two external antennas allow the router to operate in full duplex mode and provide data transfer rates of up to 300 Mbit/s. The ZyXel Keenetic Lite III router has excellent compatibility with Wi-Fi devices of different generations and easily combines them into a single high-speed wireless network. Availability of five Fast Ethernet ports (1 WAN and 4...

Cable/terrestrial receiver Delta Systems DS-950HD+ with a universal (learning) remote control with support for DVB-T2 and DVB-C, Dolby Digital 5.1, Wi-fi, IPTV. Features: - Model DS-950HD+ is equipped with a universal (learning) remote control. The remote control has five learnable buttons, which allows you to avoid using two remote controls. The receiver control buttons on the remote control are phosphorescent and glow in the dark. The glow duration is about 120 minutes (depending on how long the buttons were “charged” with light). This remote control is also compatible with DVB-T2 receivers Delta Systems DS-530HD, DS-540HD, DS-550HD, DS-750HD, DS-750HD+, DS-900, DS-910HD, DS-920, 950HD. The size of the remote control and buttons allows it to be used comfortably even by older people. - Support for WiFi adapter RT5370, MT7601 (Internet applications YouTube, Weather, IPTV, Megago). - The receiver body is metal. CHARACTERISTICS Supported standards DVB-T2 / DVB-T / DVB-C Received frequency range VHF: 174 MHz - 226.5 MHz / UNF: 474 MHz - 858 MHz Stream bandwidth: 7 / 8 MHz Modulation / Demodulation: QPSK / 16QAM, 64QAM, 256QAM Decoder FEC: 1/2, 3/5, 2/3, 3/4, 4/5, 5/6 Guard interval: 1/4, 1/8, 1/16, 1/32, 1/128 Aspect ratio: 4:3, 16:9, Auto Video resolution: 576i, 576p, 720p, 1080i, 1080p (Full HD) Processor: GC3235S Tuner: RafaelMicro 850 Demodulator: ATVM7821B

Audio and video equipment

Used equipment in excellent condition: Wireless Wi-Fi router НУАWEI HG8245H - 1800 rub. Wireless Wi-Fi SNR-CPE-W4N (rev.M) - 1200 rub. Wireless Wi-Fi router D-Link DIR-615/A - 800 rub. Wireless Wi-Fi router Netgear N300 IAD - 800 rub. Wireless Wi-Fi router Netgear N300 with USB - 800 rub. Wireless Wi-Fi router Netgear N150 - 300 rub. Cable modem Thomson TSM471 - 300 rub. Cable modem ARRIS Touchstone Cable Modem CM550 - 300 rub. Desktop switch TR-Link ТL-SF1005D - 200 RUR

Cable + terrestrial receiver World Vision Premium. New. . New improved digital terrestrial DVB-T/T2 and DVB-C World Vision Premium receiver. The set-top box is based on a high-performance Ali 3821 processor; its distinctive features over other terrestrial set-top boxes are: ✔ the ability to receive cable television in the DVB-C standard ✔ the ability to receive up to 20 terrestrial television channels in the standard e DVB-T2 ✔ ability to view Internet media and IPTV through YouTube and Web TV ✔ the presence of a built-in RF modulator for transmitting a TV signal ✔ the presence of a digital coaxial audio output ✔ the device body is metal ✔ the front panel has a stylish appearance and an expanded set of buttons for controlling the functions of the set-top box ✔ in the middle of the front panel there is an LED display to display the channel number and current time. . Among the Internet options, the Weather Forecast application, RSS Reading (news portals) are available, and a web interface is also available through which you can configure the device. . Connection to the Internet occurs through a Wi-Fi adapter and connection to a wireless network. Cost of Wi-Fi adapter with antenna = 800 rubles.

Audio and video equipment

PoE injector 802.3af Cisco AIR-PWRINJ4 allows you to provide power via Ethernet for WI-FI access points Cisco Aironet 1140, 1250, 1260, 3500 series as an alternative to power supply from a 220V network. The output voltage of the AIR-PWRINJ4 injector POE is 56 V, the maximum current is 0.55 A. According to the IEEE 802.3af standard, a constant current of up to 400 mA is provided with a nominal voltage of 48 V (from 36 to 57 V) through two pairs of conductors, providing a maximum power of 15 ,4 W. The PoE injector is equipped with mounting plastic flanges, which allows it to be secured to a perforated rack shelf using ties. On the injector body there are LED status indicators - power supply, power supply to a PoE compatible device, fault indicator. Maximum power up to 15.4 W, Maximum cable line length 100 m, Ethernet cable category - 5 or higher. Power cable included.

This model does not have a slot for a SIM card; the modem is connected via a USB connector. The main tasks are like a color e-book with additional functions - it was practically used 4-5 times on business trips and ended up on the shelf. The tablet is convenient - connected via Wi-Fi, social networks, player with music of almost any format; You can install a variety of applications developed for Android OS; IСQ and Skype; Watch videos (ideally displays videos with 720p quality); View photos and pictures, etc. Characteristics: Powerful 2-core processor: VIA8650, 800MНZ CPU + 400MНZ DSP; Android OS 2.2 with support for Flash 10.1; 256 MB RAM; Built-in memory 2GB; Memory card support (up to 32 GB); 7 inch resistive TFT screen with touchscreen function; Internet access using Wi-Fi (IEEE802.11b/g/n); Availability of USB 2.0 and RJ-45 port (allows you to connect cable Internet); Multilingual support; 1800 mAh battery; Headphone input (3.5’’); Camera 0.3 MP. Of course, judging from the above properties, it is worth noting the disadvantages. Small amount of RAM; Weak battery; Weak camera; Outdated OS (most models are equipped with version 4.0). But in principle, the Wonder Media WM8650 tablet is a pretty good device that can be bought for a small amount

Tablets and e-readers

In excellent condition. Located near the old bus station. Characteristics: Minimum system recommendations Cable or DSL modem with an Ethernet port Computer running Windows XP SP2, 2000 SP4 or Mac OS X (v10.4/v10.3) or Linux and with an installed Ethernet adapter Internet Explorer 6 or Firefox 1.5 or higher Standards IEEE 802.11b/g IEEE 802.3, 802.3u USB 2.0 WAN interfaces 1 10/100BASE-TX Ethernet port Support for DSL and cable modem connection Support for “Always-on” (bridged) and PPPoE for PPP connection upon request LAN interfaces 4 10/100BASE-TX Ethernet ports All ports support automatic MDI/MDIX polarity detection All ports support 802.3x flow control (full duplex mode) and back pressure (half duplex mode) USB interface USB 2.0 port type A Printer protocols: TCP/IP, RAW printing, LРR Support for Windows Connect Now (WСN) for configuration Connection types WAN Static IP Dynamic IP PPPoE L2TP PPTP DualAccess PPPoE DualAccess PPTP Receiving routes via DNCP Data transfer rates via Wi-Fi (with automatic switching) 54, 48, 36, 24, 18, 12, 11, 9, 6, 5.5, 2, 1 Mbit/s Maximum Internet speed* (for hardware revision Ax) Static IP: 47.04 Mbit/s Dynamic IP: 48.56 Mbit/s PPTP: 8.45 Mbit/s PPPOE: 43.92 Mbps Frequency range From 2.4 to 2.462 GHz Modulation schemes Orthogonal Frequency Division Multiplying (OFDM) Complementary Code Keying (CCK) Transmitter output power 802.11b: 17dBm +/- 2dBm at 1 1, 5.5, 2, 1 Mbps 802.11g : 13dBm +/- 2dBm at 6~12, 18, 24, 36, 54 Mbps Receiver sensitivity 802.11b: 81dBm at 11 Mbps 82dBm at 5.5 Mbps 84dBm at 2 Mbps 86dBm at 1 Mbps 802.11g: 84dBm at 6 Mbit/s 83dBm at 9 Mbit/s 82dBm at 12 Mbit/s 79dBm at 18 Mbit/s 77dBm at 24 Mbit/s 74dBm at 36 Mbit/s 70dBm at 48 Mbit/s 68dBm at 54 Mbit/s c Antenna Removable dipole antenna with SMA connector Security WEP 64/128-bit data encryption (user selectable) Wi-Fi Protected Access (WPA/WPA2) WPS (Wi-Fi Protected Setup) Two SSID Guest zone Firewall functions Network Address Translation ( NAT) Stateful Packet Inclusion (SPI) MAC address filtering URL content filtering Device management Web-based management using Internet Explorer v6 or higher browser; or Firefox 1.5 or higher Power Status indicators Internet WLAN LAN (1 to 4) USB Power input 5 VDC 2A, via external power adapter Dimensions 112.6 x 147. 5 x 31.8 mm Weight 246 g Certificates CE FCC Operating temperature From 0˚ to 40˚ C

✔️ New in packaging. ✔️ If your TV does not support receiving digital channels in DVB-C format, then to watch digital television we suggest purchasing a TV set-top box. ✔️ Digital cable receiver is designed for receiving and decoding signals in cable television networks of the DVB-C standard. ✔️ The receiver allows you to receive signals in MPEG-2 and MPEG-4 compression formats, with its help you can enjoy the unsurpassed quality of high-resolution HD channels. ✔️ In addition, the set-top box supports the DVB - T2 broadcast format. A regular antenna will pick up 20 free digital channels, you can take it to your dacha. And it can even connect to the Internet (if you have a WI-FI adapter, there is a separate price of 500 rubles) to view the following applications: Weather, RSS Reading, YouTube, Gmail, IPTV, Megago. ✔️ Great console at this price! Hundreds of them have already been sold! You can buy it in the Sipailovo area at TSK Sipailovsky floor 1, block A, boutique 1088 ✔️ 12 month warranty. ☎️ Call!

Audio and video equipment

Wi-Fi REPEATER to strengthen the signal ✔ Check out the assortment of our store by clicking on the link “BIGMAG – USEFUL GOODS STORE” under the ad. ✔ You can buy our products at retail and wholesale. FOUND CHEAPER - GET A PRICE MORE FAVORABLE FOR YOU! Come! Don't waste your time looking elsewhere! Wi-Fi REEATER to strengthen the signal =================================== Everyone has experienced insufficient Wi-Fi signal within your home or even apartment. A Wi-Fi repeater was created specifically to solve this problem, the main purpose of which is to expand the coverage area of the existing WiFi network. The meaning of its work is very simple, it intercepts the signal, amplifies it and transmits it further, significantly expanding the coverage area of your router. This gadget plugs directly into a power outlet and allows you to provide a reliable connection where there are problems connecting to a wireless network due to a weak or completely absent signal.

The Scalable Model 5354 integrates the N300 wireless-n router, which has two internal antennas, 4 camera GigE LAN ports and 2 USB ports for network cable storage. User setup is simple and includes fast and secure wireless setup using the unique security settings shown on the bottom label.Wireless Wi-Fi is compatible with high bandwidth and wide range.Four GigE LAN ports provide wired connectivity to computers, TVs, HomePlug adapters, MoCA adapters and more. Two USB ports allow users to connect a USB flash drive or hard drive for Network Addressed Storage (NAS) and/or DLNA-enabled streaming media.

The router also features a powerful security firewall, parental controls, and support for up to 253 client devices. Wireless features include advanced wireless security, WDS for extending wireless range using repeaters, and WPS for easy wireless setup.

Model 5354 Supports remote connection to IPv4 and IPv6.

Integrating a cable modem with a router saves workspace, simplifies setup, reduces cable clutter, and eliminates points of failure created by wired connections between separate devices. This product is designed and built for performance today and for years to come. He has One year warranty and quality technical support fromUSAZoom Telephonics, a leader in communications products for over 37 years.

Please note that the sale of this product is limited to use by cable operators on their own cable networks. Packaged in a plain brown box marked "not for resale".

Features of the 5354 include:

DOCSIS 3.0/2.0/1.1 performance with CableLabs, Comcast and Time Warner Cable Certification

Up to 8 downlinks and 4 uplinks, with wideband capture

Provides general high-speed Internet via cable:

Wi-Fi Compatible 802.11n, g and b wireless devices

Devices with an Ethernet port, including computers and gaming stations

Easy setup and management with unique label security settings, Universal Plug and Play (UPnP), WPS wireless security setup, and browser-based control

Four 10/100/1000 Ethernet ports (gigabit)

Two USB ports for network-attached storage with DLNA support for media servers

Includes Advanced Firewall and Wireless Security

One year warranty and support from Zoom, the US communications leader since 1977

Specifications

Operating parameters:

DescendingRising

Data transfer rate:Up to 343 Mbps (8 channels)Up to 123 Mbit/s (4 channels)

Frequency:

Modulation: 64 or 256 QAM

Operating level range:-15 to +15 dBmV

8 to +58 dBmV (QPSK)

Status indicators:

Ethernet LAN interface:

USB Interface:

Wireless connection:

Network solutions:

IPv4 and IPv6

Router Mode:

Dynamic DNS

DHCP Server and Client

Mosta

RIP V1 and V2

Control:

SNMP v1, v2, v3

Safety:

Parental control

Attack protection

IP/MAC/port filtering

Denial of service

Wi-Fi wireless network:

2 transmit/receive, MIMO

802.1x authentication

8 SSID

Transmit power: 20 dBm

Size:

Weight of packing:

1.25 lb (57 kg)

Power adapter:

110V/220V AC

12 volt 2 amp output

Working temperature:

0°C to 50°C

System requirements:

There must be an Ethernet port.

Any cycling trip.

Guarantee:

One year

Package included:

Power cube

Stand

Ethernet cable

Quick start flyer

Specifications

Cable modem service interface:

F-type jack 75 Ω (standard coaxial connector)

Operating parameters:

DescendingRising

Data transfer rate:Up to 343 Mbps (8 channels)Up to 123 Mbit/s (4 channels)

Frequency: 88 to 1002 MHz (edge to edge)5 to 42 MHz (edge to edge)

Modulation: 64 or 256 QAM QPSK and 8, 16, 32, 64, 128, 256 QAM

Communication channel: Up to 8 channels Up to 4 channels

Operating level range:-15 to +15 dBmV A-TDMA: +8 to +54 dBmV (32QAM, 64QAM)

8 to +58 dBmV (QPSK)

S-CDMA: +8 to +53 dBmV (all modulations)

Status indicators:

Power, downlink, uplink, online status, wireless link, WPS, 4 Ethernet LAN, 2 USB ports

Ethernet LAN interface:

4 X RJ-45 10/100/1000 Mbps Ethernet, with auto-MDI/MDX

USB Interface:

2 X USB 2.0 with UPnP and support for DNLA media servers and network storage

Wireless connection:

802.11n/g/b, 2X2 MIMO (multiple input multiple output)

Network solutions:

IPv4 and IPv6

Router Mode:

Dynamic DNS

DHCP Server and Client

NAT (Network Address Translation)

Mosta

Fragmentation and IP Reassembly

NTP (Network Time Protocol)

Port/DMZ transfer support

RIP V1 and V2

Supports up to 253 client devices

Quality of Service (QoS) support

Control:

SNMP v1, v2, v3

Support remote firmware update

Versatile Plug and Play

Safety:

Unique factory security settings on the label for each device

Stateful Packet Inspection (SPI)

VPN end-to-end: PPTP, IPsec tunnel

Parental control

Attack protection

System management with password protection

IP/MAC/port filtering

Denial of service

Filtering wireless mac addresses

Supports time display in original conditions Encryption (BPI) Management

Universal Plug and Play (UPnP)

Cable management diagnostic log

Wi-Fi wireless network:

Complies with IEEE 802.11n, g and b standards

Wireless data transfer speeds up to 300 Mbps*

2 transmit/receive, MIMO

Frequency range 2.4GHz-2.484GHz ISM band

Wireless Distribution System (WDS)

Wireless Multimedia (WMM/WME)

64/128 bit wired equivalence privacy (WEP) with passphrase

Wi-Fi Protected Access (WPA2, WPA) with Pre-Shared Key

Security with Wi-Fi Protection (WPS)

802.1x authentication

8 SSID

Wireless Quality of Service

Transmit power: 20 dBm

Two external antennas of adjustable position (2 dBi)

Size:

9.5" wide x 6.5" x 1.25" (24.1 x 16.5 x 3.2 cm)

Weight of packing:

1.25 lb (57 kg)

Power adapter:

110V/220V AC 50/60 Hz input into power adapter

12 volt 2 amp output

Working temperature:

0°C to 50°C

System requirements:

The cable modem must be connected to a cable modem service that uses any of

DOCSIS-3.0, 2.0 or 1.1 standards.

Directly connected devices such as computers, switches, and home adapters

There must be an Ethernet port.

. Devices connected via a wireless network must have Wireless-N, Wireless-G, or Wireless-B (Wi-Fi)

Any cycling trip.

Guarantee:

One year

Certificates: Toy Safety Certificates

UL 60950-1 Safety Certification BV, FCC Parts 15B and 15C, Cables, Comcast, Time Warner Cable

Package included:

DOCSIS 3.0/2.0/1.1 cable modem

Power cube

Stand

Ethernet cable

Quick start flyer

Manufactured in mainland China with additional quality control tests in North America.

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Latest Integration Standard

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Orthogonal Frequency Domain Multiplexing

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What's in Upstream?

Comparison table between DOCSIS 3.0 and DOCSIS 3.1

Conclusion

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