Notice serie 4 01-05 22/12/05 16:32 Page 18
POLARITY CHECK
Use the
following procedure
to check line polarity.
Connect
the black test lead to ring
(negative)
and
the red lead to tip (positive). Switch to “ON” to
access
the network. For
SERIES
4
model
:
press the
“POL”
key
on
the
keypad.
For
SERIES 4
AMPLI model
:
there
is
no polarity
key
because
the
polarity indicator
LEDs
operate
conti-
nuously, without requiring
a
key
operation.
If the green LED lights up, the
line
polarity is
correct,
if
the red LED lights up, the line polarity
is reversed.
NOTE
:
The
Series 4
test sets will operate
regardless
of
line
polarity.
RINGER
The
Series
4 test set is
equipped
with an internal
ringer
to
indicate incoming
ring
signals.
The Series
4 should be in “OFF” position in order to receive
incoming ring signals.
AMPLIFIED SPEAKER BUTTON
The Series 4 Ampli feature an amplified speaker
circuit to monitor line activity. The speaker key is
located
in the
upper
right
corner
of the
keypad
and
has a small speaker symbol on it. To operate this
feature, go
“off-hook”
(into the “ON” position) and
press the speaker key. Press once to provide the
first level of amplification. A second press will
provide additional amplification and
a
third press
will
shut off the
amplifier
feature.
Note
1 :
operation
of the
amplified speaker
feature
does not require a battery.
Note 2 : the amplified speaker feature does not
operate in monitor mode.
15
