3
Physical Characteristics
Figure 1. Physical Characteristics
cac01.eps
Power and Talk/
Monitor switch
Puts the test set in Talk (
T
) or Monitor (
M
) mode. The center position turns the test set off.
Arrows keys
The left/up arrow key moves the LCD display’s cursor left or up. The right/down arrow key
moves the cursor right or down.
SEL
The
SEL
(Select) key selects the highlighted menu entry. It also lets you enter the menu from
Talk or Monitor modes.
BACK
The
BACK
key lets you go backwards through the menus. Pressing
BACK
also turns off the
Toner and Talk Battery functions.
Numeric Keypad
The numeric keypad is used to dial telephone numbers and make function selections. The
keypad includes 12 standard dialing keys, the asterisk (
∗
) key, and pound (#) key.
SPKR
The
SPKR
(speaker) key turns the speaker on, increases its volume, and turns the speaker off.
FLSH
The
FLSH
(flash
)
key causes a timed interruption of the loop current. Hook flashing is commonly
used for call waiting functions on residential lines. Some PBX setups or telephone office
switches may use this signal to put a call on hold or to activate a special function.
The
FLSH
key is also enters a pause when entering telephone numbers in the test set’s memory.
LNR
To redial the most recently dialed number, take the test set off-hook then press
LNR
(Last
Number Redial).
MUTE
The
MUTE
key mutes and unmutes the microphone (handset or headset).
