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Cisco 837 Router and SOHO 97 Router Hardware Installation Guide
78-14781-02
Chapter 2 Installation
Preparing for Installation
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.
Warning
Ultimate disposal of this product should be handled according to all national
laws and regulations.
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
injury or damage your router.
Warning
This equipment is not designed for making emergency telephony calls when the
power fails. Alternative arrangements should be made for access to emergency
services. Access to emergency services can be affected by any call-barring
function of this equipment.
Warning
To reduce the risk of fire, use only No.26 AWG or larger telecommunication line
cord.
Warning
This equipment contains a ring signal generator (ringer), which is a source of
hazardous voltage. Do not touch the RJ-11 (phone) port wires (conductors), the
conductors of a cable connected to the RJ-11 port, or the associated
circuit-board when the ringer is active. The ringer is activated by an incoming
call.
Warning
During this procedure, wear grounding wrist straps to avoid ESD damage to the
card. Do not directly touch the backplane with your hand or any metal tool, or
you could shock yourself.