A. TALK (off-hook) Use this mode for making / answering calls. The battery is not required. 'Over current
protection' protects the tester from a zero impedance feed. Select tone/pulse before or after switching to
Beware! - Will disrupt traffic if connected to digital line while in TALK mode.
B. OFF (on-hook) The tester should be left in this mode when not in use (stand-by), as it alerts the user to
ringing voltages on the line, but uses no battery current.
To reduce disruption to digital traffic accidentally encountered, the ringer impedance is higher than normal
on-hook impedance ( But MON mode is best for checking unidentified lines).
Beware! Connecting the Compact Tester in the TALK Mode to a line will disrupt any Digital traffic.
C. MON (Monitor) This is the tester's highest AC impedance mode, and should be used for checking the
line before switching to 'TALK'.
A good battery is required for this mode.
The tester will auto power-off within 5 mins, when not connected to a powered line. It will also auto
power-on when connected to a powered line if left in 'MON' position .
In monitor mode no line current is taken, no sound is passed from microphone to line.
EXPLAINED: Unusual sounds in the earpiece/headset
Hiss:fax, modem or digital traffic.
loud, continuous 50 Hz hum: may be AC.
loud, cadenced 20 Hz hum: may be ringing. Check by switching to 'OFF'.
In 'OFF' mode, the ringer will warble in response to the ringing current, even if the battery is not installed.
1. (TBR / FLASH) Timed Break Recall
Interrupts line current for the duration set by the switch under
the battery (select from 100, 300, 600 ms). Factory setting -
2. LNR (Last Number Redial)
Redials up to 32 previous digits and any pauses.
3. POL (Hi-Z Active Polarity)
It is important to have good a battery installed to use this mode.
No clicks are induced on the line when the POL button is
Polarity works in all modes, even in parallel with an off-hook
Two second pauses are added with every press of this button,
useful for easy access to chargecards etc., use in conjunction
with LNR feature.
5. GS (Ground Start / Earth Calling)
An optional 3-wire test lead (Part No.M0459-03) is required to
use this feature.
Ensure the croc clip is connected to ground, then press just
after moving to talk mode. Release when dial tone heard.
6. TONE/PULSE selection
Dialling method. Select before switching to 'TALK'. Pressing '
in pulse mode, switches the tester to DTMF for the remainder
of the call.
Use as on a conventional phone.
7. BATT (Battery Low Warning)
In 'MON' mode, when the LED first illuminates it indicates that
approximately 2 hours of continuous operation remains.
Note: This feature does not work in 'TALK' and 'OFF'.
8. Main Mode Switch