Activant Dimensions Getting Started page 21

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.
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.
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.
Front View
Dimensions 14
A
B
Chapter 1. Hardware Training
Dimensions of a typical UPS
10.00" wide
16.00" deep
Dimensions of modem
2.00" high
6.00" wide
9.00" deep
Rear View
Input-Output
A
B
5.50" high
Dimensions of a typical
2.50" high
6.00" wide
5.50" deep
13