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PPP ModeGetting Started
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In German Safety InformationWhen using the unit, observe the following safety information: Retain this User's Guide for later use and pass it on to subsequent owners/managers of the unit. The power adapter supplied with the unit is fitted with a molded plug for connection to a standard electrical mains system supply socket. If this plug is not suitable for connection to your mains supply, contact your reseller for advice. Do not attempt to connect to the mains supply using an inappropriate mains adapter. Protect the unit from sudden, transient increases and decreases in electrical power by fitting it with an in-line surge suppressor or uninterruptible power supply. Products manufactured by 3Com are safe and without risk provided they are installed, used, and maintained in good working order and in accordance with their instructions and recommendations. Should any of the following conditions occur, isolate the electricity supply and refer to your 3Com reseller.
Never install telephone wires during a thunder storm, or install telephone connection sockets in wet locations (unless the socket is specifically designed for wet locations). Do not touch uninstalled telephone wires or terminals unless the telephone line has been disconnected at the network interface. Always exercise caution when installing or modifying telephone lines. Do not spill food or liquids on the unit. If the unit gets wet, isolate the electrical supply and contact your 3Com reseller. Do not push any objects into the openings of the unit. Doing so can cause fire or electric shock by shorting out internal components. Ensure nothing rests on the unit's system cables and that the cables are not located where they can be stepped on and cause damage to the unit. Keep the unit away from radiators and heat sources. Allow 25 mm (1 inch) around the unit or stack to provide adequate air circulation. Install the unit in a clean area that is free from dust or extreme temperatures. The Dual Link has been designed to be a free-standing unit. Do not place anything else on top of the unit's case. Allow a clearance gap of at least 50 mm (2 in) from the rear panel of the unit, to allow for cable access. Normal operations of this unit could be interrupted by a lightning surge. In this event, the user must recycle the power to the unit in order to establish normal operating conditions. Important Safety InformationWARNING: Warnings contain directions that you must follow for your personal safety. Follow all instructions carefully. Please read the following information carefully and thoroughly before installing the unit: Take exceptional care during the installation and removal of the unit. Locate the unit close to the main socket outlet, and ensure that the main socket is accessible. Use the power adapter supplied with the unit to ensure compliance with national and international safety standards. Refer to the Conformity statement for more details. Disconnect the power adapter before moving the unit. Power can only be disconnected from the unit by removing the power adapter from the unit or from the socket outlet. Only connect apparatus complying with the relevant interface requirements to the ports on this unit. The safety status of the ports on this equipment are as follows. Ports identified by the labels XXXX and YYYY = TNV. TNV (Telecoms Network Voltage) is a circuit which, under normal operating conditions, carries telecommunication signals. Ports identified by the labels AAAA and BBBB = SELV. SELV (Safety Extra Low Voltage) is a secondary circuit which is designed and protected so that under normal and single-fault conditions, the voltage between any two accessible parts does not exceed a safe value (42.2 V peak or 60 V DC). There are no user-replaceable fuses or user-serviceable parts inside the unit. If there is a physical problem with the unit that cannot be solved with problem solving actions in this guide, contact the 3Com reseller from whom the equipment was purchased. If the units are stackable, only stack similar units. WARNING: Twisted Pair RJ45 data ports. These are shielded RJ45 data sockets. They cannot be used as telephone sockets. Only connect RJ45 data connectors to these ports.
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