LANCOM 821+ – LANCOM 1711+ VPN – LANCOM 1721+ VPN Chapter 2: Installation23EN(LANCOM 821+ and LANCOM 1721+ VPN) or (LANCOM 1711+ VPN)of the router and the other end into an ISDN/S0 multi-device mode orpoint-to-point mode connection. Configuration port – you may optionally connect the router directly tothe serial port (RS-232, V.24) of a PC. Use the cable supplied for this pur-pose. Connect the configuration port of the LANCOM (LANCOM 821+and LANCOM 1721+ VPN) or (LANCOM 1711+ VPN) with a free serialport of the PC. Alternatively you may connect an external modem (analogue or GSM) tothe serial port using the LANCOM modem adapter kit, if you would like tomake use of an additional WAN line for remote maintenance, backup con-nections or dynamic VPN. Connect to power – Connect socket of the unit to a power supplyusing the included power adapter. Use the supplied power supply unit only! Using an unsuitable powersupply unit may cause damage or injury. Operational? – After a short device self-test the Power LED will be per-manently lit. Green LAN LEDs indicate the LAN sockets that have function-ing connections. Devices with integrated ADSL modem could become quite warm dur-ing their operation. Concerning these models, please pay attention tothe ambient air temperature range of max. 35°C. Make sure that theventilation is sufficient. Do not stack the devices and do not exposethem to direct insolation!2.5 Software installationThe following section describes the installation of the Windows-compatiblesystem software LANtools, as supplied. You may skip this section if you use your LANCOM VPN Router exclu-sively with computers running operating systems other than Win-dows.