The modem is a transceiver device with modulation and demodulation functionality, that is, it mainly has two operating systems: the modulating one, which consists of an electrical or electromagnetic signal, containing specific information (such as audio, video or data), and the demodulating one who takes care of receiving and restoring the modulated signal.

A modem (DCE Data Communication Equipment), in association with a network terminal, or a PC (DTE Data Terminal Equipment), is capable of coding, decoding and converting an electrical signal from analog to digital and vice versa.

They are thus allowing to carry out transceivers of data of all kinds, in the field of communications or transmissions, both digital (PC) and analog (twisted pair).

Here we had listed out some of the best fiber optic modems that are present below.

NETGEAR Nighthawk Multi-Gig Cable Modem (CM2000) - Compatible With All Cable...
  • Compatible with major cable internet providers including Xfinity, Spectrum, Cox and more. NOT compatible with Verizon, AT andT,...
  • Best for cable provider plans up to 2.5Gbps
  • Works with any WiFi router. Connect any WiFi router to this modem’s Ethernet port to support all your wireless devices
  • 1 x 2.5 Gig Ethernet port for the fastest, true multi-gig Internet connections
  • Engineered with DOCSIS 3.1, 32X8 channel bonding and OFDM(A) 2x2
SaleRANK NO. 2
TP-Link AX1800 WiFi 6 Router (Archer AX21) – Dual Band Wireless Internet...
  • VPN Server: Archer AX21 Supports both Open VPN Server and PPTP VPN Server
  • Dual-Band WiFi 6 Internet Router: Wi-Fi 6(802.11ax) technology achieves faster speeds, greater capacity and reduced network...
  • Next-Gen 1.8 Gbps Speeds: Enjoy smoother and more stable streaming, gaming, downloading and more with WiFi speeds up to 1.8 Gbps...
  • Connect more devices: Wi-Fi 6 technology communicates more data to more devices simultaneously using revolutionary OFDMA...
  • Extensive Coverage: Achieve the strong, reliable WiFi coverage with Archer AX1800 as it focuses signal strength to your devices...
SaleRANK NO. 3
C4000LG CenturyLink Modem by GreenWave (Renewed)
  • Up to 3 Gbps Speed - 600+2400 Mbps with 2-stream connectivity
  • Networking Optimized Dual-Core Processor Powerful processor boosts wireless, wired and WAN-to-LAN performance
  • 160MHZ Channel Support*- Doubles the speeds as offered by 80MHz channels to provide gigabit speeds for compatible mobile devices...
  • 1024-QAM - 38% increase in data rate compared to 256-QAM 802.11ac
  • 1 DSL Port - Supports all ADSL or VDSL profiles up to 17a
SaleRANK NO. 4
CenturyLink Prism TV Technicolor C2100T 802.11AC Modem Router Gigabit DSL Fiber...
  • Compatible with CenturyLink VDSL/ADSL2+ Services (Not compatible with fiber connections or ATT)
SaleRANK NO. 5
TP-Link MC220L | Gigabit SFP to RJ45 Fiber Media Converter | Fiber to Ethernet...
  • 【Convert Fiber to Ethernet】Designed to convert 1000BASE-SX/LX fiber to 1000Base-T copper media or vice versa.
  • 【Versatile Compatibility】Works with both single-mode and multi-mode fiber SFP modules and is fully compatible with 10/100/1000...
  • 【Easy to Use】Plug and play with no software installation or configuration needed.
  • 【Auto-Negotiation Gigabit Connection】Auto-negotiation RJ45 port supports Half-Duplex/Full-Duplex transfer mode and...
  • 【Long-Range Transmission】When used with different types of SFP modules, the Hot-Swappable FX Port extends fiber distance up to...
SaleRANK NO. 6
CenturyLink C4000XG Gigabit Fiber WiFi Modem Router (Renewed)
  • Wi-Fi 6 antenna - 2.4 GHz,5 GHz 802.11ax (backwards compatible with 802.11a,b,g,n,ac). Supports fiber speeds up to 2.5 Gbps...
  • Dynamic QoS - Prioritizes internet traffic by application and device for smoother streaming. 5 Gigabit ports (1 WAN + 4 LAN)
  • Smart Connect - Intelligently selects the fastest Wi-Fi band for every device connection. Smart Connect single wireless network...
  • Intel Wi-Fi 6 Gig+ is the next generation in-home Wi-Fi technology, designed for the ever-increasing demand of connected homes and...
SaleRANK NO. 7
ARRIS Surfboard S33 DOCSIS 3.1 Multi-Gigabit Cable Modem | Approved for Comcast...
  • Save Money: Own your modem and save. Reduce your cable bill up to $168 dollars per year in cable modem rental fees (Savings vary...
  • Modem Technology: DOCSIS 3.1 is the newest technology available from cable internet providers. Its 10x faster than DOCSIS 3.0,...
  • Simple and Secure Set-up: Plug-in the device, download the SURFboard Central App, and follow the instructions to activate the...
  • Compatibility: The SURFboard S33 is compatible with major U.S. cable internet providers including Cox (Gigablast), Spectrum...
SaleRANK NO. 8
NETGEAR Nighthawk 6-Stream AX5400 WiFi 6 Router (RAX50) - AX5400 Dual Band...
  • Coverage up to 2,500 sq. ft. for up to 25 devices.
  • Fast AX5400 Gigabit speed with WiFi 6 technology for uninterrupted streaming, HD video gaming, and web conferencing
  • Connects to your existing cable modem and replaces your WiFi router. Compatible with any internet service provider up to 1Gbps...
  • Plug in computers, game consoles, streaming players, and more with 4 x 1G Ethernet ports Share a storage drive with any connected...
  • NETGEAR Armor protects your family's WiFi with an automatic shield of security across all your connected devices with a 30-day...
SaleRANK NO. 9
NBS AT&T BGW-320 500 802.11a/n/ac/ax Wireless-ax Integrated/Built-in ONT...
  • Simultaneous use of phone, video, and high-speed data over any one of the available WAN interfaces
  • IPTV video
  • Concurrent Wi-Fi support for 4 x 4 802. 11ax on 2. 4GHz, and 4 x 4 802. 11ax on 5GHz both High and Low band
  • Primary line VoIP telephone service
  • SFP/SFP+ Cage for Optic Module
Single Mode LC Gigabit Fiber Media Converter - Includes LC SFP 20 km (12.42...
  • AUTOMATICALLY adapts to 10 Mbit/s, 100 Mbit/s (Fast Ethernet) or 1000 Mbit/s (Gigabit) Speed And Extends it over Single Mode Fiber...
  • Supports Dual Speed Fiber Mode (configurable by dip switch) – Select 1000Base-LX (default setting) or 100Base-LX –...
  • SUPPORTS Jumbo Frame & LLF feature - for increased end-to-end TCP performance for media converter fiber unit and end point smooth...
  • PLUG & PLAY Fiber Media Converters - Simply plug in an optical LC port and UTP RJ-45 port, and it will work immediately;
  • FREE UTP Cat5e Patch Cable (1m - 39in) Comes In The Set With Every Unit! - Colors May Vary Depending on Stock;

Everything You Need to Know About Fiber Optic Modem

Types of Modems

Even before starting with reviews and rankings, it is right to describe and differentiate the various types of modems. In shopping centers, on Amazon or in any other technology product store, modems are classified and categorized according to their kind.

The main types of modems are:

  • Modem router;
  • Router;
  • Modem;
  • Wireless repeater;

If you were an expert, we advise you to go directly to the next paragraph, otherwise, read on to understand the substantial differences between these devices.

Modem Router

The Modem Router is a technological device able to connect to the Internet line through the telephone cable and to access any devices connected to the Wireless (WiFi) network.

In America, it is identified with the term “Modem Router Combo,” since it does a job both as a modem and as a router. Surely this is the kind of product you are interested in, and in fact, the whole page is structured to advise you on the best based on various circumstances.


The router is a device capable of allowing the exchange of IP packets from one network to another. Since it does not contain a modem inside, with a simple router, it is not possible to access the Internet.


The modem is a device that can connect to the Internet through the telephone cable, but does not guarantee connection to multiple devices. In all cases, tools such as the modem are not equipped with wireless technology, but with a single Ethernet port that allows the connection.

Wireless Repeaters

Wifi Extenders may look like modems or routers visually, but in reality, they perform a different function. Technically, they are only able to extend the potential of a wireless network.

They are all those devices that are purchased, for example, to bring a WiFi network in the garden, or on different floors of the same house.

How to Choose a Fiber Optic Modem?

Many features must be taken into consideration when buying a WiFi router, some extremely simple to understand, and others a little more “technical” that require a little study by us users. Here they are all in detail.

WIFI Classes, Data Transfer Rates and Frequency Bands

The first features that need to be considered are the Wifi classes and the frequency bands supported by the router. Wifi classes are different, and each of them supports a different transfer speed.

Class b allows you to transfer data up to 11 Mbps; the class g reaches up to 54 Mbps; the class n reaches up to 450 Mbps, while the class called wireless AC reaches up to 1.3Gbps (equal to 1331 Mbps).

If you have an Internet connection higher than 11Mbps (e.g. a 20 Mega) make sure you don’t use a very old router that can only support class b.

wifi router

As for the frequency bands, if you want to exploit them all and you want to avoid interference, I highly recommend you opt for a dual-band router.

The dual-band routers, in addition to supporting the classic 2.4GHz radio band, can transmit the signal on the 5GHz frequency band.

The 5GHz group avoids the problems related to interference that can be encountered on 2.4Ghz radio channels – now crowded with wireless devices of all kinds – and therefore ensures generally better performance.

There are, however, a couple of “cons” to keep in mind: the range of action of 5GHz networks is less than that of 2.4GHz systems and to use them you need to have computers and devices compatible with this technology ( not all computers, smartphones, and other accessories are compatible with 5GHz networks). It should also be noted that to take advantage of the speed of the wireless AC standard, it is necessary to operate on the 5GHz band.

The most advanced routers with 5GHz network support also have Beamforming + technology, which improves the performance of 5GHz networks over the long haul by directing the signal precisely to the devices that need it.

Some high-end routers are even called tri bands as they manage to use the 2.4 GHz band and two 5 GHz bands simultaneously to ensure faster data transfer speeds.

At present, routers of this type are still costly, so I recommend considering them only if you have specific needs related to the use of inter-band technology. Another “abbreviation” that can be found on high-end routers – but also some mid-range routers – is MU-MIMO.

Routers that support MU-MIMO technology (short for Multiple User, Multiple Input, Multiple Output) can handle requests for multiple devices simultaneously without compromising the speed of data transfer to any of them.

They, therefore, ensure greater efficiency in data transfer than the so-called traditional routers, which instead can communicate with only one device at a time (in the sense that they transmit data to a client, await its response, and then pass to the other clients following the same diagram).

To exploit the potential of the MU-MIMO, it is necessary to use devices compatible specifically with this technology and with the wireless AC standard.

Connection Protocol

Remaining on the maximum supported speed, there is also the connection protocol provided by the telephone operator, which can be ADSL2 (up to 12M) or ADSL 2+ (up to 24M). Purchase a router that supports the protocol used by your connection.

WiFi router

The most advanced modems/routers also support VDSL / VDSL2 technology, which allows reaching a browsing speed of up to 300 Mega. Many providers call it “fiber,” but technically, it is not a pure optical fiber.

Yes, it provides the connection from the street cabinet with the fiber optic control unit, but in homes, the connection comes through the classic copper twisted pair (the so-called Fiber to the Cabinet).

Another important thing to underline is that VDSL profiles can be multiple, and not all routers can “hold” them all: if the vast majority of routers on the market “digest” profile 17a.

This allows you to navigate up to 100 Mega, and not everyone can support the 35b profile, which instead allows you to browse up to 250 Mbit / s in download (if you are within 250 m of the street closet).

To learn more about these connection technologies, see my post in which I explained which operator has the fastest Internet and this Wikipedia page.

Ports and Connections

Now let’s talk about the ports available on routers. As mentioned above, routers and modem-routers have ports that allow the connection of various devices. These doors can be of various types.

Chipset, Ram, Cpu, and Antennas

Other features to be taken into consideration are those relating to the components, both internal and external, of the router. Components such as the chipset, RAM, CPU, and router antennas can greatly affect the performance of the device.

The chipset, for example, can play a role in connection stability. As I also explained to you in my tutorial on how to increase ADSL speed, there are some router models – almost all those equipped with Broadcom chipsets.

This allows you to adjust a parameter called SNR margin thanks to which it is possible to mitigate the instability of the network and increase connection performance when you are away from the control panel.

CPU and RAM, on the other hand, play a fundamental role in traffic management: the more powerful they are, the better the device behaves in “stressful” situations. However, these are features that only those with particularly advanced needs must look at.

To be taken into consideration, then, there are the number, the position (internal or external), and the power of the antennas with which the router is equipped (which is expressed in dBi). The more powerful the antennas are, the greater the range of the wifi network.

Router with Mesh Support

If you have a huge house (or office) and you need to spread the WiFi network in every corner of the latter, you can buy a router equipped with support for mesh networking technology.

Mesh networking is a technology that allows you to have a single network, with the same name, the same access key and no problem of disconnections or loss of speed, using a router (to be connected to the ADSL or Fiber modem) and one or multiple satellites that thus share the connection in all corners of the house.

Mesh networks are distinguished from traditional ones formed, for example, by a router and a series of separate repeaters in that there is no hierarchical order between the various nodes of the network.

Each node, therefore, each router/satellite that makes up the network, communicates with each other – often using a dedicated radio channel – by expanding the coverage of the WiFi network and creating a single large network available throughout the home.

The number of satellites can be increased freely, and there is no loss of performance in the connection, also because all the nodes send and receive data at the same speed.

At the time of writing, mesh networking systems are not yet widespread in the consumer sector, so they are still costly, but if you have a huge area to cover with the WiFi signal, they may be worth the expense.

Router Functions

In addition to the hardware features we have talked about so far, before purchasing a router, you must also evaluate its software side features.

For example, it is necessary to check whether the device offers parental control functions to inhibit access to certain websites and limit access to the Internet during certain hours of the day.

If you can create a guest network to share your Internet connection with other people if you can adjust the percentage of traffic to reserve for the various devices connected to the network and so on.

Another feature worth considering is WPS support: a technology that allows the modem to communicate with other wireless devices (e.g., printers, repeaters, etc.) with the press of a simple button. It is not always recommended for security reasons (in the past this technology has been the subject of numerous security holes), but it can be useful.

Last but not least, it is good to inquire about the ease of use of routers: if there are a lot of functions but they are all difficult to use, it is useless to have them.

If you are not an expert in the subject and you are not willing to go into it, it is better to buy a router with a few fewer functions, but which is simpler to configure.

Portable Routers and 3 G / 4 G Support

Some routers have support for data SIMs and Internet Keys, thus allowing you to browse 3G / 4G. They are instrumental in those situations where the ADSL connection is not available due to a failure, and you do not want to be completely disconnected from the network.

There are also home modem routers that only support 3G and 4G networks and thus allow you to quickly surf the Internet (provided you sign up for an adequate data plan) bypassing the limitations of the traditional ADSL network.

Portable routers deserve a separate discussion: these are compact devices, often battery-powered, which allow you to connect to 3G and 4G networks on various devices simultaneously. In the final part of the article, I will point out some that might come in handy.

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