• LANCOM 1781A-4G
  • LANCOM 1781A-4G
  • LANCOM 1781A-4G

End of sale: LANCOM 1781A-4G

Business VPN router with an integrated ADSL2+ modem and 4G LTE for secure multi site networking

The LANCOM 1781A-4G is a professional, high-performance VPN router with an integrated ADSL2+ modem. The additional 4G LTE modem additionally delivers data rates of up to 100 Mbps - ideal for maximum operational reliability in case the primary Internet connection should fail. Thanks to a wide range of VPN capabilities, the LANCOM 1781A-4G helps businesses, branch offices and retail stores to network their different sites with maximum security. The right choice for secure, reliable and sustainable networking solutions "Made in Germany".


Professional VPN router with ADSL2+ modem

With its integrated ADSL2+ modem, the LANCOM 1781A-4G connects to a normal ADSL connection to provide professional Internet access for businesses, offices and retail stores.

Integrated multiband 4G LTE modem for data rates up to 100 Mbps

The integrated 4G LTE modem equips the LANCOM 1781A-4G for high-speed 4G LTE with up to 100 Mbps, which makes it ideal for intelligent mobile backups in case the DSL connection should fail. All-in-all it is a high-performance basis for highly available networks in any industry.

Secure site connectivity via VPN

The LANCOM 1781A-4G offers high levels of security. The standard equipment of 5 IPSec VPN channels guarantees strong encryption, secure connections for mobile employees, and protection of corporate data. The LANCOM VPN option upgrades the router to support 25 VPN channels. This ensures that your network is perfectly scalable and can grow on demand - without additional hardware components.

Stateful inspection firewall

Equipped with a stateful inspection firewall, the LANCOM 1781A-4G protects the entire network. With features such as intrusion prevention and Denial-of-Service protection, this business VPN router provides optimal protection and secures all of the data on the network.

Advanced Routing & Forwarding

The LANCOM 1781A-4G provides up to 16 securely isolated IP contexts, each of which has its own separate routing. This is an elegant way of operating IP applications with one central router and keeping the different communication channels securely separated from one another.

Security Made in Germany

In a market with a strong presence of American and Asian products, LANCOM offers maximum security "Made in Germany". The entire LANCOM core product range is developed and manufactured in Germany, and tested according to the highest standards of security, data protection and quality. The company's own "closed-source" operating system LCOS is developed at the company headquarters in Germany. Our in-house team of developers works in a highly secure environment as certified by the BSI (German Federal Office for Information Security) - all of which is subject to the highest standards of security, encryption, and quality.

Maximum future-proofing

LANCOM products are based on professional expertise, years of experience in IT, and high-quality materials. All of our devices are equipped with hardware that is dimensioned for the future and, even reaching back to older product generations, updates to the LANCOM Operating System - LCOS - are available several times a year, free of charge. This guarantees a long service life while staying technically up to date, which represents a true protection of your investment.

Systematic networking solutions

LANCOM VPN routers are the basis for secure encrypted site connectivity and high-speed Internet access. As professional system components, they are fully compatible to all LANCOM network components and enable flexible scaling and expansion when using further LANCOM components. The result is a secure and flexible all-round solution that you can rely on. The overall network down to each individual device can be managed and monitored from a central instance - for a solution that is systematic.

Technical features

  • Business VPN router with an integrated ADSL2+ modem and an 4G LTE modem for data rates of up to 100 Mbps
  • Secure site connectivity with 5 simultaneous IPSec VPN connections (25 channels optional)
  • Integrated stateful-inspection firewall with intrusion detection and Denial-of-Service protection
  • Network virtualization with up to 16 networks on one device (ARF)
  • Security Made in Germany
  • Maximum future compatibility, reliability, and security

Accessories and Options


Downloads for this product and usable LCOS versions can be found in our Download area.


Foto Robert Beckmann


You have questions about our products or solutions, or are you looking for a LANCOM sales partner? Then let us know your wishes via contact form or feel free to contact us by phone.

Inside Sales International Team

Phone: +49 (0)2405 49936 122