Nokia 22 Operator's Manual page 21

The signal strength is indicated by the light indica-
tors until the receiver is replaced on the hook.
For the use of light indicators in the Intensity of Field, see Table 4: IOF light in-
dicators.
Note: Only emergency calls can be established when the terminal is in
the IOF state.
Note: The installation location must be clean and dry. The terminal must
be installed indoors. The terminal operating temperature range is
-10C...+55C.
©2001 Nokia Mobile Phones. All rights reserved.
Setting up the terminal
21