AVM Fritzbox 4020 it's a great choice for home or small office networking.
- Supports VPN
- Parental Control
- Prioritization
- NAS via USB disk
- WiFi-LAN Guest Access

Supports Voip telefony: needs to register with a Voip Provider or VOIP PBX over internet
Connect an IP phone.

Interfaces: 4 x Fast Ethernet (10/100 Base-T)
Wireless access point compliant with IEEE 802.11n, g, b
1 x USB 2.0 port for printers and storage media sharing
Transfer Rate: LAN 10/100 MBit/s , WAN 10/100 MBit/s
LEDs Activity: 4x LAN, WAN, WLAN, power, status
WLAN and WPS switch
WIFI speed 11 MBit / s (2.4GHz IEEE802.11b), 54 Mbit / s (IEEE 802.11g 2.4 GHz), 450 MBit / s (2.4GHz IEEE802.11n)
Coding WPA2
Connections: RJ-45 LAN x4, WAN, USB 2.0

Media Server, DLNA, FRITZ! NAS, WPA2 encryption AVM Stick & Surf, Wi-Fi Protected Setup (WPS), wireless extension through repeater function, Wireless Auto Channel, WLAN Eco
Dimensions: (WxHxD)166 x 48 x 120 mm
Αccessories: Power supply

* Works with any modem
You can use the FRITZ!Box on any DSL, cable or fiber optic modem or with 3G/4G dongles. Another possibility: Use it as a router in an existing network. It is also easy to integrate the 4020 in existing wireless LAN networks.

* At home anywhere with MyFRITZ!
With the MyFRITZ! service from AVM, you benefit from secure and convenient access to your FRITZ!Box from anywhere in the world. You can retrieve files stored in FRITZ!NAS, view your recent call list and listen to messages left on your answering machine. With the MyFRITZ!App, you can even access your FRITZ!Box remotely using your smartphone or tablet.

* Peace of mind
FRITZ!Box offers comprehensive protection against attacks. The preconfigured firewall, filter functions, and ex works wireless encryption ensure secure connections. Parental controls and guest Internet access are, of course, included free of charge.

Internet
- Wireless router for the connection to a cable/DSL/fiber optic modem or 4G/3G dongle
- Use of existing Internet connections via LAN and wireless LAN
- Support for IPv6
- Stateful Packet Inspection Firewall with port forwarding
- Secure remote access over the Internet with VPN (IPSec)

Wireless LAN
- Wireless radio networks compliant with 802.11n (up to 450 Mbit/s gross; 2.4 GHz) and 802.11b/g
- Secure ex works with WPA2 encryption
- AVM Stick & Surf: automatic security for wireless surfing
- WLAN button (to switch wireless LAN on/off manually)
- Wi-Fi Protected Setup (WPS)
- Wireless guest access – secure surfing for friends and visitors
- Wireless network range extended through repeater function
- Wireless auto channel: Automated search for wireless LAN radio channel free of interference
- WLAN Eco for optimum performance at minimum power consumption

Convenience for the home network
- Media server makes music, pictures and videos available to devices in the home network (SMB, FTP, UPnP AV)
- With MyFRITZ!, secure access to your own FRITZ!Box from anywhere
- FRITZ!NAS – simple, browser-based access to all files in the network, wherever they are stored
- Networked applications such as IPTV, video on demand and media streaming
- Parental controls, push service, cloud contacts, online storage
- Guest access: sharing of existing Internet connection over LAN or wireless LAN
- Wake on LAN over the Internet
- Supports devices compliant with DLNA