45053 • 45054
5
LED Indications
• Low Battery: Low Battery LED flashes red.
• Off-Hook Mode: Mode LED flashes red.
• Monitor Mode: Mode LED flashes green.
• On-Hook Mode: No LEDs are illuminated.
Hazard Indication
A constant ringing may indicate a hazard — excessive AC voltage on the line. If you hear this
alarm, remove the test set from the line carefully and immediately.
Identification
TALK
MONITOR
MUTE
1
2
3
4
5
6
7
8
9
0
#
LNR/PAUSE
MEM
STO
POL
PULSE
FLASH
SPKR
VOL
+
–
ABC
JKL
TUV
GHI
PQRS
TONE
DEF
MNO
WZYZ
Polarity LED
Mode LED
Low Battery
