LANCOM 821+ – LANCOM 1711+ VPN – LANCOM 1721+ VPN Chapter 2: Installation19ENperiod of inactivity. When needed, the S 0 bus automatically reacti-vates and the ISDN status LED illuminates in green.ISDN Data Status display for both ISDN B channels: ETH LAN connector status in the integrated switch: VPN Status of a VPN connection.2.3.1 Device connectorsThe connections and switches of the router are located on the back panel:off No connection establishedgreen Blinking Diallinggreen Flashing Establishing first connectiongreen Inverse flashing Establishing further connectiongreen Constantly on Connection established via B channelgreen Flickering Data traffic (send or receive)Off No networking device attachedGreen On (perma-nently) Connection to network device operational, not data trafficGreen Flickering Data trafficRed Flickering Data packet collisionOff No VPN tunnel establishedGreen Blinking Connection establishmentGreen Flashing First connectionGreen Inverse flashing Other connectionsGreen On (perma-nently)VPN tunnels are established
