Chapter 1. Hardware Training
UPS (Uninterrupted Power Supply)
This is the battery backup for the CPU. In case of power failure, the UPS will
provide uninterrupted power to the computer for a specified length of time so
valuable data will not be lost. It provides enough time to appropriately shut down
the computer if needed.
Dimensions of a typical UP
5.50" high
10.00" wide
16.00" deep
Modem
This is an electronic device that connects the computer with a telephone line
allowing the computer to communicate with a remote location terminal. It
actually stands for MOdulate/DEModulate, a term describing its function.
Modems are peripheral devices requiring a port to the computer.
Dimensions of modem
2.00" high
6.00" wide
9.00" deep
A/B Switch
This is a switching device that allows one port to be shared, for example, between
a terminal and a modem. When the switch is turned to A, it functions as a
terminal. When it is turned to B, it functions as a modem. Sometimes it is
necessary to have an A/B/C or A/B/C/D switch. It is usually port #2.
Dimensions of a typical
2.50" high
6.00" wide
5.50" deep
A
B
Front View Rear View
Input-Output
A
B
Dimensions 14 13
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