The SCALANCE M826-2 is an SHDSL modem for low-cost, secure connection of Ethernet-based subnets and programmable controllers via existing two-wire or stranded cables and supports the ITU-T standard G.991.2 as well as SHDSL.biz (single-pair high-speed digital subscriber line). This gives the device high symmetrical data rates of up to 15.3 Mbit/s per wire pair.

The security of access and communication is ensured by the security functions of the integrated firewall and by VPN tunnels (end-to-end connection encryption through IPsec tunneling).