Turnbutton/Pushbutton - NORTHERN ELECTRIC NE-500 Identification, Installation, And Maintenance

SECTION 502-5101-201
3.41 NE-554QD. The NE-554QD telephone set is
identical to the NE-554BR telephone set,
except it is not equipped with an external ringer
volume control.
3.42 NE-554FRN. The NE-554FRN telephone
set is identical to the NE-5 54BR telephone
set, except it is equipped with a modified line
switch and is wired to avoid interference with the
dialing or talking of another subscriber on a party
line. When the handset is lifted, a low-loss receiver
circuit is bridged across the line due to partial
operation of the line switch. If the line is not busy,
or if an incoming call is to be answered, pushing
in
the monitor switch (located on the right side of the
set), fully operates the line switch, completing the
talking and dialing circuit. Replacing the handset
restores both the line switch and monitor switch.
3.43 NE-556FRN (MD). The NE-556FRN (MD)
telephone set is identical to the
NE-554FRN telephone set, except it has an
NE-426A electron tube, and is intended for 4-party
selective and 8-party semiselective (polarized
ringing line) service.
3.44 NE-554BQA. The NE-554BQA telephone
set is identical to the NE-5 54BR telephone
set, except it has a QDB IC all-number dial, and a
P096C252 signal switch located below and to the
right of the dial. T he signal switch leads are
connected to a P338886 terminal strip located on
the dial bracket.
3.45 NE-55JBQJA. The NE-554BQ1A telephone
set is identical to the NE-554BR telephone
set, except it has a QDB 1 C all-number dial.
3.46 NE-55JQ4A. The NE-554Q4A telephone
set is identical to the NE-554BR telephone
set, except it has a ground switch located below
and to the right of the dial. The ground switch is
wired between tip and ground. Depressing the
switch button connects one side of the line to
ground.
3.47 NE-558DR. The NE-558DR telephone set is
the standard 2-line set. It is equipped with
standard components, except the dial is a QDB lB
dial with an additional set of contacts, which mute
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the dial pulses for use in speakerphone systems. In
addition, the NE-558DR telephone set is equipped
with an exclusion switch and an NE-584B
turnbutton-pushbutton. Holes are provided in the
baseplate for mounting an NE-659A transmitter
for use in home communication systems. The
exclusion switch and turnbutton-pushbutton
provide the following services:
(a) The exclusion switch provides a means of
disconnecting an ex tension station by raising
the plunger projecting through the top of the
housing. The switch returns to normal when the
handset is replaced.
(b) In home communications systems, the
exclusion switch may be used to place the
CO line on hold while using the intercom.
( c) The turnbutton-pushbutton provides a
means of transferring the talking circuit to
either of two lines. This swi tch can also be used
to cut off or transfer lines, extension stations,
ringers, etc. Depressing the button momentarily
closes a pair of contacts to provide signaling.
3.48 NE-558CR. The NE-558CR telephone set is
identical to the NE-558DR telephone set,
except the dial is replaced with an NE-95B
apparatus blank, and the set is wired for manual
service.
3.49 NE-558DQA. The NE-558DQA telephone
set is identical to the NE-558DR telephone
set, except it has a QDB 1 D all-number dial.
3.50 NE-2554BQJA. The NE-2554BQ1A
telephone set is the standard single-line
DIGITONE wall set.
It
is identical to the
NE-554BR telephone set, except it is equipped
with an NE-35Q3A (MD) or NE-35Q3A 1
DIGITONE dial. Left and right dial-mounting
adapters are required to mount the dial.
3.51 NE-2558DR. The NE-2558DR telephone
set is the standard 2-line DIGITONE wall
set, (Fig. 2).
It
is identical to the NE-558DR
telephone set except it is equipped with an
NE-35Q3G (MD) or NE-35Q3Al DIGITONE dial,
and a P096C204 2-line switch, which allows the A
lead to be switched when changing lines . .