red LED will light if the test leads are
reversed; that is, the red test lead
connected to the
tip(positive)and the
black test lead connected to the ring
(negative) side. In either case line
polarity has been determined.
CAUTION:
Operation of the PO-
LARITY button on a busy circuit may
cause annoying clicks or service in-
terruptions.
NOTE:
The Dracon TS21 is NOT
polarity sensitive, allowing the Test
Set to function normally when con-
nected to the line in either polarity.
MUTE BUTTON
(optional).
Located on the inside of the
handgrip just above the transmitter.
When pressed, this small black button
mutes the transmitter, eliminating
sidetone and providing improved in-
telligibility in noisy locations.
GROUND START BUTTON
(optional).
Located in the same
place as the optional MUTE button.
When pressed, this small black button
connects the ground (green) lead to
the ring (red) lead of the special
three-conductor ground start cord,
initiating a ground start line seizure.
TCI Library: www.telephonecollectors.info
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