Due to increasingly stringent security requirements, particular from network operators with critical infrastructure, encryption of the whole transmission path is becoming more and more interesting. Our solution, based on the QuFast SHDSL 600 EL range of devices, encrypts all traffic based on MACsec on layer 2. In this case, encrypted traffic is routed via the SHDSL or optical fibre line (up to 1GE wire speed). Therefore, the QuFast SHDSL 600 EL can also be used just as L2 encryption terminals/switches. For applications with SHDSL transmission, devices with 4 or 16 twisted pairs (can be bundled to increase the bandwidth) are available as desktop units or as top hat rails with up to four twisted pairs (two directions).