FRITZ!Box 6840 LTE - Technical data

FRITZ!Box 6840 LTE
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FRITZ!Box 6840 LTE Interfaces


  • Integration into the LTE broadband network (tri-band) with LTE SIM card (Mini-SIM)
  • 4 x gigabit Ethernet 
  • Wireless N with up to 300 Mbit/s
  • 2.4 or 5 GHz band
  • USB 2.0 port for printer and storage media
  • DECT base station for up to six handsets
  • 1 a/b port for analog telephone, answering machine or fax

Technical specifications


  • LTE category 3 modem (3GPP Release 8)
  • Rates of up to 100 Mbit/s for downloads and up to 50 Mbit/s for uploads
  • Triband support: band 20 (791 – 862 MHz, FDD, „digital dividend“), band 3 (1710 – 1880 MHz, FDD) and band 7 (2500 – 2690 MHz, FDD)
  • Supports the channel bandwidths 5, 10, 15 and 20 MHz
  • MIMO reception technology via two external antennas
  • Option for connecting two outdoor antennas over SMA connectors
  • For Mini-SIM


  • LTE router with firewall/NAT, DHCP server, DynDNS client, UPnP AV
  • Stateful Packet Inspection Firewall with port forwarding for secure web surfing
  • Supports the IPv6 web protocol
  • Secure remote access over the Internet with VPN (IPSec)
  • Parental control with filter lists
  • Remote maintenance via https

Wireless LAN

  • Wireless networks compliant with 802.11n (up to 300 Mbit/s),  compatible with 802.11g, b and a
  • Wireless N for use in either the 2.4 GHz or 5 GHz band (dual band)
  • Secure ex works with WPA2 encryption
  • Encryption with WPA2, WPA/WPA2 mixed mode
  • AVM Stick & Surf: automatic security for wireless surfing
  • WLAN pushbutton (to switch wireless LAN on/off manually)
  • Wi-Fi Protected Setup (WPS)
  • Integrates iPhone and Android smartphones wirelessly in the home network
  • WLAN Eco for optimum performance at minimum power consumption


  • Telephone systems with DECT base station for up to 6 cordless telephones
  • Voice transmission encrypted upon delivery
  • Port for analog telephone, answering machine or fax
  • DECT button for registering cordless telephones and to page handsets
  • Supports HD telephony for natural sound
  • LTE bandwidth management: calls and surfing in optimum quality
  • DECT Eco: Radio network switches off ergonomically
  • 5 integrated answering machines featuring voice-to-mail
  • Fax function including e-mail forwarding (fax-to-mail)
  • Call diversion, internal calls, three-party conferencing, call transfer
  • Call blocks, alarm, baby monitor, VIP calls and Do not Disturb
  • Internet telephony SIP-compliant in accordance with RFC 3261
  • Registration of IP telephones (LAN/WLAN) SIP-compliant
  • FRITZ!App Fon for telephony with Apple iPhone (iOS4 or higher) or Google Android (2.1 or higher)

Convenience for the home network

  • Media server makes music, pictures and videos in the network 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
  • Platform for networked applications like IPTV, video on demand and media streaming
  • Parental controls, push service, cloud contacts, online storage
  • Guest access – secure surfing for friends and visitors (Wireless LAN/LAN)
  • Wake on LAN over the Internet


  • "": multi-language user interface, for intuitive operation via Web browser
  • User interface optimized for smartphones and tablets (responsive design)
  • Free updates for new functions and security
  • Advanced view for special configuration options, help function with full-text search
  • FRITZ!Apps for wireless LAN telephone calls in the home network, file access from on the go and more (Android and iOS)
  • Smart Home features integrated in the user interface
  • Smart Home devices can be switched manually and automatically both in the home network and from the Internet

Interface details

  • Integration into the LTE broadband network (tri-band) with LTE SIM card
  • 4 x gigabit Ethernet (10/100/1000 Base-T) for PC,  game console, network, IP telephone
  • Wireless N access point (IEEE 802.11n, b, g, a) for PC, notebook, tablet, smartphone
  • USB 2.0 port for printer, storage media and Stick & Surf
  • DECT base station for up to six handsets
  • 1 a/b port (RJ11) for analog telephone, answering machine or fax

Package contents

  • FRITZ!Box 6840 LTE
  • Power supply unit
  • 1.5-meter LAN cable
  • Installation Guide


  • 5-year manufacturer’s warranty

Device properties

  • Dimensions (W x H x D): 210 x 155 x 25 mm
  • Average power consumption: 6-8 Watt

Article number

  • 20002557

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