AVM Fritz!Box Fon WLAN 7390

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What you get for your money
The Hardware
Configuring the router
Configuring router for Ethernet WAN
Connection tweaking and DSL feedback
Wireless Configuration
Parental Controls and Filters
Port Forwarding and Remote Access
IPv6 Port Forwarding
Telephony, PSTN, VoIP and ISDN
Integrated Storage
Miscellaneous Router Options
Mobile/3G broadband connection


The AVM Fritzbox 7390 is a router for all occasions and is probably the most feature packed device we have ever used.

In addition to the expected support for ADSL and ADSL2+ services, it can connect directly to a VDSL2 (FTTC) service, and one of the LAN Ethernet ports can be re-purposed to allow you to use it with cable modem services, or other services that offer an Ethernet presentation.

Add to this the range of telephone connectivity (including VoIP, PSTN and DECT), media server, 3G USB modem connectivity, and it is possible the 7390 may be the router to rule them all. Importantly, for people looking for future proof hardware, IPv6 is also supported.

What you get for your money

AVM Fritzbox 7390 box contents
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AVM’s unconventional product design is continued, with the 7390 more resembling a futuristic hovercraft or a classic 1950’s American muscle car with its fins. The fins do serve a purpose, as they help to keep an air gap clear above the router.

The list of contents is as follows:

  • Router (dimensions: 21cm x 15.5cm x 2.5cm)
  • Power supply (230V input, 12V 2A output)
  • Yellow Cat 5e Ethernet cable
  • 3m long RJ11 modem and telephone Y cable (twisted pair)
  • 2 x RJ11 plug to UK phone socket adapters
  • Installation Guide

There are no micro filters included which is a little unusual, but by now we suspect many UK homes already have a couple of these.

Connectivity options

The 7390 is capable of broadband across a choice of technologies including:

  • ADSL
  • ADSL2/2+
  • ISDN telephony
  • VDSL2 (FTTC)
  • WLAN at up to 300 Mbps(2.4GHz and 5GHz)
  • 3G USB modem for backup
  • LAN port reconfigurable as an eWAN port for use with cable and fibre services

The 7390’s ability to handle a range of broadband technologies might be an advantage for those wishing to future-proof their equipment, rather than changing equipment as those technologies become available.

The wide range of connectivity may seem confusing, but the routers web interface does a good job of guiding users through the range of options, and the 7390 is aimed at the enthusiast or business user who has already got experience in setting up routers.

The Hardware

AVM Fritzbox 7390 rear ports
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From left to right:

  • ADSL/ADSL2+/VDSL2 Connection;
  • FON ports 1 & 2 for analogue telephone or fax;
  • FON S0 port for ISDN telephony or ISDN PBX usage;
  • USB 2.0 for connecting printer, USB storage devices or USB 3G modem;
  • Gigabit LAN ports 1-4
  • Power Supply

A second USB port is located on the side of the 7390. The top of the router also features a button to switch the DECT base station in the router into association mode, and a handy button to turn off/on the wireless network.

AVM Fritzbox 7390 DECT and WLAN buttons
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Dismantling the 7390 reveals that the two fins house the Wi-Fi antenna .

AVM Fritzbox 7390 PCB removed from case
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Configuring the router

The unusual combined telephone and RJ11 ADSL lead may confuse some, but it is pretty simple. The RJ11 connector goes to the ADSL side of the micro filter and you can, if you want to use the Fritzbox as a DECT base station, connect the telephone connector to the telephone socket on the microfilter.

As is common with pretty much all ADSL/ADSL2+/VDSL modem router units, once the ADSL is connected the device will automatically synchronise with the hardware in the telephone exchange or street cabinet. The configuration of the router is really to enter any authentication details your broadband provider supplied, or adjust the myriad of other options in the 7390.

WARNING: The 7390 behaved oddly on an old BT Wholesale 20CN (ADSL only) service appearing to lock the DSLAM port into a state that required a remote reset, but on a 21CN (ADSL2+) service there was no problems at all. AVM had tested the 7390 at the BT test labs, and it worked in all the combinations thrown at it. The 20CN service is decreasing its footprint, with less than 20% of the UK reliant on it for connectivity now.

HINT: LAN ports 2,3 and 4 are configured to use 100 Mbps by default, so if your computers Ethernet port has 1000 Mbps (1 Gbps) forced as its only connection speed you will see no link light.

Once the router has booted up and you are connected, preferably via Ethernet initially, connection is achieved by typing ‘fritz.box’ in a browser or typing (routers default IP address). If your computer cannot get an IP address, check that you do not have an IP address set up manually, or if DHCP fails to work, manually setting an IP address in the range to, with a subnet mask of and a gateway of should get you connected.

There is no default administrator password set, but before you can proceed with the configuration process you are forced to enter a new administrator password.

The feature rich device can be a little difficult to navigate if used to simpler routers, but the groupings are logical, so for example if you want to change the IP range used by the router for DHCP on the LAN side, you click the Home Network menu, then Network, then the Network settings tab, followed by IP Addresses button to reach the following screen.

AVM Fritzbox 7390 IP Settings to change routers LAN IP
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Once access to the 7390 is achieved, the user is presented with a system overview. This gives a general run-down on connected devices and services, and their status.

AVM Fritzbox 7390 Router Status Page
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As you can see the IPv6 connectivity really does work, and the page layout gives you an overview of almost every feature on the router. Each section is clickable taking you to that specific area.

One unique feature is the night service, which allows you to power down the wireless network (saving a little power) and for those who like a quiet nights sleep, you can disable all the telephones that operate via the device.


The 7390’s interface is fairly intuitive. If you get lost, the Contents page is available at the top of the each screen.

AVM Fritzbox 7390 Contents Page
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In addition, a range of wizards to assist the user is available.

AVM Fritzbox 7390 Configuration Wizards
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There is an Expert mode, which if this is your first fully featured router you may find switching down to standard mode may help to reduce the confusion that can arise from so many options.

Getting Online

Once you can see any routers web interface, the first thing you will want to do is configure the internet connection.

AVM Fritzbox 7390 Internet Account Configuration
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Select the methods of connection, check any specific settings, enter username and password if applicable, and the 7390 will attempt to connect online.

While IPv6 support from broadband providers is still limited, where it is available the 7390 supports it, and seems to work pretty well with IPv6 and IPv4 enabled at the same time.

AVM Fritzbox 7390 IPv6 Settings Tab
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Configuring router for Ethernet WAN

One of key advantages with the 7390 is that it supports Ethernet WAN connections, making it suitable for use with cable and FTTC/P services.

The simplest method is what you would use to connect to a Virgin Media cable service, e.g. where you have switched their superhub into modem mode. Select Internet Connection via LAN 1 and No account information required. In this mode the router will request an IP address from the modem it is connected to via Ethernet on LAN1.

While writing the review we found that configuring the router to use the eWAN port worked best after a reset to factory defaults. The upstream and downstream speeds only need to be worried about if you make use of the Quality of Service options.

AVM Fritzbox 7390 Configuring Ethenet WAN Mode
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For the growing number of people with FTTC and FTTP connections, the account information option PPPoE should be selected, and the username and password supplied by your provider will need to be entered. For BT Infinity users the username is usually something like [email protected]

We should add a few words about the second Operating Mode, Share Existing Internet Connection in the network, this mode essentially disables the NAT and firewall of the 7390, and the router effectively becomes a simple wireless access point.

Connection Tweaking and DSL feedback

The level of information in the 7390 is unprecedented, and surpasses what most broadband support staff can see about your service. There is a DSL information page giving the standard sync speeds, attenuation and signal to noise ratio, but there are additional spectrum plots and graphs of the SNR over time.

AVM Fritzbox 7390 DSL Information and Spectrum
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The signal-to-noise ratio plot shows the classic SNR dip that can occur once the sun sets, and in combination with the DSL spectrum can be useful in identifying why your connection is not stable.

AVM Fritzbox 7390 DSL Statistics
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The 7390 connection settings can be fine-tuned to suit stability or quality, or a balance of the two. This allows you to experiment with your connection, without having to telephone your broadband provider and waste 30 minutes on the telephone.

AVM Fritzbox 7390 Options for Tweaking DSL Connection
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In actual use we found the 7390 even with its settings at the default Maximum Performance to be a stable router, coping with fluctuations in noise margin, without undue stress.

Wireless Configuration

The router supports b, g and n wireless networks, offering dual band connectivity at 2.4GHz and 5GHz. The router out of the box has a 16 digit WPA/WPA2 security key set.

The simpler option of WPS push button connectivity is supported, and you can define an additional PIN so that the WPS system cannot be abused by guests. A welcome addition is the support of a Guest channel, which has its own set of security settings.

As with the DSL connectivity, WiFi is highly configurable, and the presence of a spectrum plot for both wireless bands will help you choose which radio channels to use, or allow the 7390 to continue with its sensible default settings.

AVM Fritzbox 7390 Wireless Configuration for 2.4GHz and 5GHz
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The 7390 has 40MHz wide channels enabled, which are needed to get the fastest speeds out of WiFi, and the ‘Show disturbances’ option clearly shows the potential for interference in the 2.4GHz spectrum, hence why having dual-band devices is so important for good wireless connectivity.

AVM Fritzbox 7390 Wireless Interference Plot
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Parental Controls and Filters

The 7390 provides network filtering, with parental control, application filtering, and application prioritisation.

The summary page lists all the devices that have been seen by your network, and allows you to control access.

AVM Fritzbox 7390 Parental Controls Overview
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Editing the options for each device could take some time, but if you have children in the home, then the simple ability to restrict access times can be important. The blacklist system claims to support the German BPjM module, but this still allows a wide range of adult content, so parents with younger children would be advised to use the whitelist system to control a list of sites you are happy for your child to have unrestricted access to.

AVM Fritzbox 7390 Device Access Rules Page
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The white list editing is very simple, and you can enter partial site names e.g. bbc.co.uk which would allow access to all content hosted on bbc.co.uk. The black list option would take forever to keep up to date, so is of less use in the UK. The ability to block applications may prove useful, and if on a below average speed broadband connection, application blocking can be a good way to ensure one member of a household does not hog the connection.

The Prioritisation tab is where people in households with lots of devices may spend a lot of time. By default prioritisation is enabled for VoIP and any streaming done via the Fritz!Media system.

AVM Fritzbox 7390 Quality of Service Prioritisation Page
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Adding a new application to the three categories is very easy, real-time applications will always run, and if anyone of them utilises 100% of your connection the router will lock out any other activity. Prioritised applications are more forgiving, and will allow some other traffic through. Background applications allows you to define what applications you do not mind being slow if the connection is busy, prime candidates here would be bittorrent.

You can assign a complete device to any one of the priority levels, thus a household with a keen gamer, may want their Xbox 360 in the real-time category, and a home based mail server could happily run as a background application.

Port Forwarding and Remote Access

The Permit Access menu (under Internet) controls a wide range of things, including port forwarding, NAS, remote access via HTTPS to the 7390, DynDNS, VPN server and a section to control which IPv6 devices are visible from the Internet.

AVM Fritzbox 7390 Port Forwarding Rules
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By default the ability for UPnP to punch holes in the NAT to allow devices that require ports open is disabled. In terms of security this is preferable as it avoids devices opening up the network without warning. The main Port Forwarding is very straightforward to use simply click the New Port Forwarding button to take you to the screen.

AVM Fritzbox 7390 Adding Port Forwarding Rule
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The default list of servers available is, FTP Server, HTTP Server, eMule TCP, eMule UDP and MS Remote Desktop. To create a new rule for an application that does not exist, select Other Applications and extra fields for protocol, from and to port will appear.

The Exposed Host option, allows you to define a single device as the DMZ host, in other words this machine becomes totally exposed to the Internet.

The Remote Access tab allows you to make the Fritz!Box web interface available from the Internet, and unusually it uses HTTPS, with the option to switch from the default TCP port of 443. There is no default username and password, which is a welcome change from manufacturers who use easy to guess default authentication settings.

Dynamic DNS built into the router is a rare but welcome sight. We have seen other routers offer this, but often only supporting dyndns.org, the 7390 supports 11 different providers, and in theory many more, all you need is the update URL for the router to communicate with.

AVM Fritzbox 7390 VPN Settings
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The VPN tab looks very sparse, this is because it relies on an external software package available at http://www.avm.de/en/vpn. Unfortunately only MS Windows software is available, but the software is only used to create the VPN settings file. The reason we suspect they have gone for this file based approach, is that it is easier to transfer the settings between computers and avoid the problems of not getting the settings correct when linking to 7390 units via the internet.

IPv6 Port Forwarding

One of the reasons why many consumers are wary of IPv6 is that there is a perception that when using IPv6 all the computers on your local LAN will be visible to the Internet. The IPv6 port forwarding section on the 7390, offers a very reassuring explanation:

"Computers connected to FRITZ!Box are safe from unauthorized access from the Internet. However, for certain applications such as online games or the eMule file sharing program, it must be possible for other users in the Internet to access your computer. Such connections are made possible by enabling port forwarding."

The 7390 while providing full IPv6 addresses to computers connected to it, runs a firewall that in its default state blocks incoming access – just like NAT does for IPv4. Configuring a port forward rule is very simple, and as port ranges are supported, if you want to make a device very visible it should easy to achieve.

Telephony, PSTN, VoIP and ISDN

The 7390 has the potential to act as a true service hub, by allowing you to route both old fashioned PSTN services via the device, as well as handle VoIP and ISDN telephone lines. You can also use the 7390 to receive faxes for those very rare occasions when you need it.

AVM Fritzbox 7390 Telephony Device Configuration
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The first step to get the 7390 to handle calls is to configure your fixed (PSTN) line if you have this connected to the router. Assigning a name to the number is useful, as you can configure handsets to receive calls from multiple lines (e.g. VoIP). Usefully once you configure the fixed line, the router will attempt to make the telephone ring, so you can check you have the physical connections correct.

The 7390 allows you to dispense with your existing DECT base station if you want, using the stands to just charge the telephone. The DECT configuration is in its own menu on the router, allowing you to control parameters such as the handset registration PIN.

AVM Fritzbox 7390 VoIP Internet Telephone Configuration
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The VoIP configuration is relatively straightforward; the fun really starts once you have both VoIP and a fixed line configured. Since under the Dialling Rules you can control which telephone service a specific dialled number will actually use, by default emergency calls such as 999 and 112 are configured to use a fixed line if one is attached.

Once you have your cordless handsets connected, you do have the option to control each DECT handset individually, so you can restrict individual phones to only ring for certain incoming calls.

Integrated Storage

AVM have included 512MB of integrated storage memory, for use with its NAS and media server functions. For example, it could be used to continue uploading to an external network while the PC is switched off. If 512MB is not enough, there are two USB ports for additional storage or the ports can be used for other USB devices, such as a printer.

AVM Fritzbox 7390 Storage (NAS) Configuration
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The ability to link online cloud storage to USB devices connected to the 7390 is an interesting one, and assuming you believe your WebDAV provider is secure enough this method can offer a good way to back up personal data. The increasing size and reducing cost of USB memory also means adding 32GB or more of storage capacity for storing documents on your LAN rather than any one device is appealing.

The NAS is available via either a file share, or by a DNLA media server. Accessing the media server was easy and worked well with the various devices we tried.

USB Devices

The USB devices window seems to offer very few options. For those wanting to use the 7390 as a media server, the option to enable energy-saving mode (to spin down hard drives) for attached devices will be welcome, , reducing power consumption and background noise.

AVM Fritzbox 7390 Configuring Attached USB Devices
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The USB Remote Connection is an interesting aspect, allowing you to have devices connected to the 7390, but accessible as if they were connected direct to the PC. This relies on the installation of a software driver, again this is restricted to Windows 7, Vista and XP. With the media service options using this to access a storage device makes little sense, it makes more sense for connecting a USB printer and a guide to doing this is on the AVM website.

Miscellaneous Router Options

The surprises in the routers interface continue, with the system section offering twelve more sub windows of options.

Energy Monitor

The 7390 runs fairly cool, even when using it with both 2.4GHZ and 5GHz wireless networks enabled. Testing suggests the unit is consuming around 5W if the wireless networks are turned off, and up to 11W with them enabled. Obviously power consumption will vary according to what you can connect to the router, hence the presence of a power consumption monitor to let you track which parts of the router are using all the power.

AVM Fritzbox 7390 Energy Monitor
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Here we can see how connected devices and available services have consumed resources. The screenshot above shows the unit when its DSL line was disconnected and wireless turned off. Interestingly even with wireless turned on and DSL connected, the overall system power only rose to 41%.

A very useful security option hidden away in the Energy Monitor Settings tabs is the ability to control the speed of the four LAN Ethernet ports, or even totally disable them. Running the ports at a slower speed can also help reduce power consumption.

AVM Fritzbox 7390 LAN Port Configuration
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AVM Fritzbox 7390 CPU and Memory Utilisation
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The statistics page is interesting, but with no scale for the temperature it is not terribly useful. The CPU Usage and RAM allocation are more useful, particularly for those who are really pushing the capabilities of the 7390. With a movie streaming over the internet, and a HD video streaming off a USB stick on the 7390, the CPU usage only rose to around 5%.

Night Service

Being able to turn off the wireless network is one of the ‘green’ aspects of the router, but it can also be used to help avoid teenagers staying up all night chatting away online. A simple off every day between two times is configurable, or for the real control freaks you can configure a lot more complex set of on/off points. One nice option is that you can elect to stop the wireless network from switching off if a device is actively using it.

The Do Not Disturb option allows you to turn off all the telephones connected to the 7390, hence avoiding those annoying wrong number calls that happen at 3 in the morning. More complicated rules for when different telephones will ring can be configured in the Telephony section.

Push Service

The Push Service can be configured to send a daily/weekly or monthly email that summarises the various operations of the 7390. This includes telephone call logs, usage records for the broadband connection, event logs and the DSL attenuation and noise margins when the email was sent.

AVM Fritzbox 7390 Configuring Sending Logs Via Email
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For those who help to administer a broadband connection for someone else, or a small business wanting to track call logs (which are also attached as a CSV file) this feature could prove very useful.

Event Log

Most routers offer some form of logging service, but all too often these are minimal. With the extra CPU and memory the 7390 offers, these logs can actually be useful. Six different logs are available:

  1. All Numbers - Nothing to do with telephony, but just an overview of what has been happening to the system, e.g. when Internet access was lost and connected again.
  2. Telephony - Logs on what the telephone functions of the 7390 have been seeing.
  3. Internet Connection – Information on parameters such as what IPv6 and IPv4 addresses have been assigned to the WAN side of the router.
  4. USB Devices – Information about the identity of USB devices connected to the router.
  5. WLAN – logs of when a device has connected, with its MAC address, or device name and the devices connection speed. Interestingly it even logs when a microwave was detected, and thus 300 Mbps speeds temporarily turned off.
  6. System – Logins to the routers own user interface.

Mobile/3G Broadband Connection

Given the price of the 7390 it is unlikely you will buy it to primarily use it as a mobile broadband router, but having this built into a router can be useful as a backup connectivity option.

AVM Fritzbox 7390 Configuring 3G Dongle Connectivity
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We plugged a Vodafone USB dongle into the router, which the router happily saw, but we were unable to get any connectivity, but given the rural location this is not actually unusual. Further testing at a location with actual 3G service, rather than GPRS at best will be needed.

We did notice that plugging in the 3G dongle was the only thing that slowed the routers web interface down, and rather than being very snappy, it slowed down to a page displaying after a few seconds wait. The routers logs show the router being stuck in a 10 second cycle, with the dongle throwing errors. Strangely the router continued to perform slowly even after the dongle was removed and switched off/on, suggesting that perhaps the 3G connectivity may need some extra work in the firmware.


One thing we did notice when doing testing is that the bottom of the case under the main processor does get pretty warm. This seems to be a localised hot spot on the case, as the remainder of the device remains reasonably cool.

Testing this router is interesting, as there are so are many permutations possible. In terms of throughput we have followed our usual pattern of testing transfer speeds between two computers on the LAN side, and as this router supports Ethernet WAN (for FTTC/P services) we have also tested that.

All wireless testing was done with WPA/WPA2 encryption enabled, this can affect throughput, but running a wireless network without encryption is not recommended. The nominal speeds reflect the connection speed reported by the laptops wireless network card.

Test Location/Type Measured Speed
Gigabit LAN between two PC’s 600 Mbps
2.4GHz Wireless (<2m – 2nd floor) 70 Mbps (nominally 130 Mbps)
5GHz Wireless (<2m – 2nd floor) 90 Mbps (nominally 240 Mbps)
2.4GHz Wireless (5m – 1st floor) 65 Mbps
5GHz Wireless (5m – 1st floor) 105 Mbps
2.4GHz Wireless (10m ground floor) 12 Mbps
5GHz Wireless (10m ground floor) 55 Mbps
File copy from USB stick direct to PC 125 Mbps
File copy from USB stick via NAS to PC 25 Mbps
File copy to USB stick on PC 33 Mbps
File copy to USB stick on NAS 4 Mbps
Download throughput Ethernet WAN port 200 Mbps
Upload throughput Ethernet WAN port 300 Mbps

We usually test at two further locations, a conservatory, which for the 7390 gave no signal from both wireless frequencies and the same further down the garden. Other devices have reached those locations, so it seems while very good speeds are possible, the range is a little limited.

The throughput figures for the Ethernet WAN port are impressive and show the router should be able to cope with any FTTC service (even once vectoring is deployed), but may struggle if you subscribe to a service that connects at over 200 Mbps.

For those worrying about how the router performs on ADSL2+ and the noise margin drop once the sun sets, the line used for testing suffers from variable amounts of noise, but the 7390 would hold onto the line for a week or more, when other routers would drop it once or twice a night.


Never in the course of the years we have reviewed broadband hardware have we come across a device with so many connectivity options. While this can seem overwhelming, and occasionally we did lose our way in the web interface, the web interface is generally very easy to use, and most important is always responsive.

The routers price at around £200 is not cheap, but then you do get a router that will work on almost any UK broadband connection, including use as a 3G router. For a business that has a number of home workers, the inclusion of VoIP, VPN and flexibility on the Internet side along with good logging and remote access should appeal.

The only disappointing aspect with the router was to do with the telephony side, both DECT and corded telephones gained a fair bit of white noise on the line, not enough to interfere with a call, but when used to crystal clear DECT systems, it is a surprise.

For the home user, if you have a tablet and smartphone with limited storage space, then a NAS for storing all your music, video and pictures will be high on your shopping list, and the 7390 fulfils this roll nicely. In fact if you add up the cost of all the separate boxes to do what this router achieves, it could be considered a bargain, and you only need one power supply, rather than a block of four or five.

We would not recommend the 7390 to someone as their first router, but if you have setup your own broadband router before it should prove easy to use. For those people used to routers that are slow when using their web interface, the 7390 is a breath of fresh air with a very responsive interface (apart from when a 3G dongle in poor reception area is connected).

The niggle with the old ADSL only service, is a worry and may have actually been something specific to that exchange, alas the ADSL2+ service has replaced the ADSL service in that area so we cannot investigate further.

In the three months we ran the 7390 on an ADSL2+ line it was rock solid. It is a sign of how reliable a router is when you forget you actually have one under test.