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6-3
Hardware Installation Guide for the Cisco 4451-X Integrated Services Router
OL-27644-01
Chapter 6 Installing and Upgrading Internal Modules and FRUs
Safety Warnings
Warning
Never install telephone jacks in wet locations unless the jack is specifically designed for wet
locations.
Statement 1036
Warning
Never touch uninsulated telephone wires or terminals unless the telephone line has been
disconnected at the network interface.
Statement 1037
Warning
Avoid using a telephone (other than a cordless type) during an electrical storm. There may be a remote
risk of electric shock from lightning.
Statement 1038
Warning
To report a gas leak, do not use a telephone in the vicinity of the leak.
Statement 1039
Warning
There is the danger of explosion if the battery is replaced incorrectly. Replace the battery only with
the same or equivalent type recommended by the manufacturer. Dispose of used batteries according
to the manufacturer's instructions.
Statement 1015
Warning
Blank faceplates and cover panels serve three important functions: they prevent exposure to
hazardous voltages and currents inside the chassis; they contain electromagnetic interference (EMI)
that might disrupt other equipment; and they direct the flow of cooling air through the chassis. Do not
operate the system unless all cards, faceplates, front covers, and rear covers are in place.
Statement
1029
Warning
For connections outside the building where the equipment is installed, the following ports must be
connected through an approved network termination unit with integral circuit protection.
T1 SFP
Statement 1044