Cisco Systems 804, 802 manual Preventing Electrostatic Discharge Damage

Before You Start

Warning Before working on a system that has a standby/off switch, turn off the power by pressing the power switch to standby and unplug the power cord. Statement 150

Warning Before working on equipment that is connected to power lines, remove jewelry (including rings, necklaces, and watches). Metal objects will heat up when connected to power and ground and can cause serious burns or weld the metal object to the terminals. Statement 43

Warning The IDSL connection is regarded as a source of voltage that should be inaccessible to user contact. Do not attempt to tamper with or open any public telephone operator (PTO)-provided equipment or connection hardware. Any hardwired connection (other than by a nonremovable, connect-one-time-only plug) must be made only by PTO staff or suitably trained engineers. Statement 23

Warning To avoid electric shock, do not connect safety extra-low voltage (SELV) circuits to telephone-network voltage (TNV) circuits. LAN ports contain SELV circuits, and WAN ports contain TNV circuits. Some LAN and WAN ports both use RJ-45 connectors. Use caution when connecting cables. Statement 1021

Warning Ultimate disposal of this product should be handled according to all national laws and regulations. Statement 1040

Warning If the symbol of suitability with an overlaid cross ( ) appears above a port, you must not connect the port to a public network that follows the European Union standards. Connecting the port to this type of public network can cause severe personal injury or can damage the unit. Statement 1031

Preventing Electrostatic Discharge Damage

Electrostatic discharge (ESD) is a transfer of electrostatic charge between bodies of different electrostatic potentials, such as an operator and a piece of electrical equipment. It occurs when electronic components are improperly handled, and it can damage equipment and impair electrical circuitry. Electrostatic discharge is more likely to occur with the combination of synthetic fibers and dry atmosphere.

Step 1 Always use the following ESD-prevention procedures when removing and replacing components: Connect the chassis to earth ground with a wire that you provide.

Step 2 Wear an ESD-preventive wrist strap that you provide, ensuring that it makes good skin contact.

Connect the clip to an unpainted surface of the chassis frame to safely channel unwanted ESD voltages to ground. To properly guard against ESD damage and shocks, the wrist strap and cord must operate effectively. If no wrist strap is available, ground yourself by touching the metal part of the chassis. Always follow the guidelines in the preceding section, “Safety.”

Step 3 Do not touch any exposed contact pins or connector shells of interface ports that do not have a cable attached.

Installing and Configuring Cisco 802 IDSL and Cisco 804 IDSL Routers

78-10368-03 3