NORTHERN ELECTRIC NE-500 Instruction Manual

NORTHERN ELECTRIC PRACTICES Filing Instructions: SECTION 502-5101-201
THIS SECT ION REPLACES SECT I ONS 502·510·100CA I SS. F, Issued: 30 November 1973
502.510-121 cA 1ss. c, 502.515.100 1 ss . e, 502.515.121 Standard
ISS . C 502·515·300 I SS. A WHICH SHOULD BE REMOVED
FRO M tHE BI NDERS AND D ESTROYED. FI LE THIS SECTIO N IN
NUMER I CA L SEQ UE NC E.
TELEPHONE SETS
NE-500, NE-1500 (MD), NE-2500
NONBUTTON AND ONE-BUTTON TYPE
IDENTIFICATION, INSTALLATION, AND MAINTENANCE
CONTENTS PAGE CONTENTS (Cont) PAGE
1. GENERAL 1 C. Turnbutton /Pushbutton 25
D. Ringer Capacitor 27
2. DESCRIYI'ION 2
6.
ASSEMBLY OF PARTS 27
GENERAL 2 A. Housing (Desk Telephones)
28
COMPONENTS 5 B. Housing (Wall Telephones) 28
C. Ringers
28
A. Mounting Cord 5 D. Dial 28
B. Handset 5 E. Apparatus Blank (Desk Telephones) 29
C. Rotary Dial (NE-500Type) 5
F. Apparatus Blank (Wa ll Te lephones)
29
D. DIGITONE* Dial (NE-2500Type) 5 G. Cords (Handset and Mounting)
30
E. Line Switch 5 H. Line Switch Cover Assembly 30
F. Ringer 5 I. Exclusion Switch 30
G. Network 7 J. Plunger
30
K. Turn button and Terminal Strip 31
ORDERING INFORMATION 7
L. Faceplate (NE-2500 Type
Telephone) 31
FEATURES 7
M. Designation Window (NE-2500
Type Telephone)
31
3.
IDENTIFICATION 7
1. GENERAL
GENERAL 7 1.01 This section contains information for the
TELEPHONE SET IDENTIFICA TI ON 7 identification, install
at ion, and maintenance
of nonbutton and one-button NE-500, NE-1500
4. INSTALLATION
20 (MD), and NE-2500 type wall and desk telephone
sets.
5. MA INTENANCE
20
1.02 The NE-1500 and NE-1554 type telephone
·A. Line Switch Assembly 25
sets are manufacture discontinued (MD) and
B. E}(cl usion or Monitor Switch
25
are superseded by the NE-2500 and NE-2554 type
•A trademark of Northern Electric.
©Northern Electric Company Limited, 1973
PRINTED IN CANADA Page 1

SECTION 502-5101-201
telephone sets. The components of the NE-1500
(MD) type telephone sets are compatible with th e
NE-2500 type telephone sets except for the dial
and housing.
1.03 An NE-426A electron tube (Fig. 3) or a
P0895087 ringer isolator kit (Fig. 4) may be
installed within the telephone set to correct
inductive noise conditions. Refer to the section on
the P0895087 ringer isolator kit for connection
information.
2. DESCRIYfION
GENERAL
2.01 The NE-500 and NE-554 type telephone
sets are equipped with a rotary dial. The
dial may be replaced in the field, with an NE-95B
apparatus blank, if the telephone set is converted
for manual operation. (Fig. 5 and 6.)
Fig. 1 - NE-25000 Telephone Set
Page 2

SECTION so2-s101 ~ 201
r EXCLUSION SWITCH
Fig. 2 - NE-2558DRTelephone Set
NE-584 TYPE
2 LINE & SIGNAL
SWITCH
Page 3

SECTION 502-5101-201
Page 4
Fig. 3 - NE-500 TypeTelephone Set Showing Method of
Mounting NE-426A Electron Tube
Fig. 4 - NE-500 TypeTelephone Set Showing Method of
Mounting P0895087 Ringer Isolator

2.02 The NE-1500 (MD) and NE-1554 (MD)
type telephone sets are identical to the
NE-500 and NE-554 type except they are equipped
with a 10-button NE-25 type DIGITONE dial.
2.03 The NE-2500 and NE-2554 type telephone
sets are similar to the NE-500 and NE-554
except they are equipped with an NE-35 type
DIGITONE dial.
COMPONENTS
2.04 All components (except the line switch
plungers on the desk type telephone sets)
are mounted on the base of the set. The line switch
plungers are part of the housing assembly.
A. Mounting Cord
2.05 NE-500, NE-1500 and NE-2500 desk type
telephone sets are provided with a 5-1 /2
foot mounting cord, which may be replaced with a
9- or 13-foot NE-D type 3-conductor cord, or a
13-foot NE-D type 4-, 6-, 10- or 16-conductor
cord. The mounting cord is connected to the
service leads through the appropriate connecting
block.
B. Handset
2.06 All sets are shipped with an NE-G3AR
handset. The handset may be replaced with
a handset containing an amplifier, such as the
NE-G6AQ lA for customers with impaired hearing,
or an NE-G7AQ lA for customers with impaired
speech. An NE-G8AQ1A handset may be used in
noisy locations.
C. Rotary Dial (NE-500 Type Sets)
2.07 Most NE-500 type telephone sets are
equipped with QDB 1 type dials. The NE-7
(MD) type dial is superseded by the QDB 1 type
dial. The rotary dial is available with or without
the word "OPERATOR" printed on the number
plate and must be specified when ordering.
SECTION 502-5101-201
D. DIGITONE Dial (NE-2500 Type Sets)
2.08 NE-2500 type DIGITONE sets are equipped
with NE-35Q3A1 12-button dials. The
NE-25 type 10-button dial and NE-35 type
12-button dial are MD and are superseded by the
NE-35Q type dial. The wiring connections for the
NE-35Q type dial differ from the NE-25 type and
NE-35 type dials and circuit modifications must be
performed as detailed in the appropriate section.
The two additional buttons on the NE-35Q type
dial are designated * and t:t. While operational,
their use is restricted to end-to-end signaling. The
DIGITONE dial is available with or without the
word "OPERATOR" printed on the "O" button ,
and must be ordered accordingly.
2.09 The NE-35Q type dial assembly contains a
line-powered oscillator, which generates two
frequencies when a button is depressed. These
frequencies are transmitted to the CO, which must
be equipped with a converter. The converter
accepts the oscillator signals and translates them
into a 2-out-of-5 code for crossbar offices, or dial
pulses for step-by-step offices.
E. Line Switch
2.10 The card-operated line switch uses
bifurcated contact springs to improve
reliability. These are protected by a plastic cover.
The line switch is held in the off-hook position by
a coil spring. The weight of the NE-G3AR handset
is sufficient to overcome the force of the coil
spring, allowing th e card to return the line switch
contacts to the on-hook position.
F. Ringer
2.11 Most telephone sets are equipped with
NE-C4A ringers. The ringer volume may be
adjusted for four levels using the four
corresponding positions of the volume control,
(Fig. 7 and 8). A fifth position is supplied for
manual ringer cutoff, an installation option.
Page 5

SECTION 502-5101-201
Page 6
Fig. 5 -NE-500 Type Telephone Set Housing Equipped With an
NE-95B Apparatus Blank
LATCH ASSEMBLY
NE-95B
APPARATUS BLANK
6-32 x0. 50
MACHINE SCREW
HOUSING CATCH
Fig. 6 - NE-554 Type Telephone Set Housing Equipped With an
NE-95B Apparatus Blank

G. Network
2.12 NE-500, NE-554, NE-2500, and NE-2554
type telephone sets are equipped with an
NE-425QE1network, which contains the necessary
apparatus for automatic line equalization. In most
telephone sets all connections to the set are made
on the network terminals. The NE-425QE1
network provides five extra bridging terminals with
no electrical connection to the network circuits.
The NE-425B (MD) or NE-425E (MD) networks
are superseded by the NE-425QE1 network.
Fig. 7 - NE-500 Type Telephone Set Base
Showing Date Stamp and Ringer
Volume Control
ORDERING INFORMATION
2.13 When ordering the sets the desired color
must be specified, using the suffixes given in
Table A (e.g., to NE-500CR- add 03 to indicate
black).
FEATURES
2.14 The features of each telephone set are
shown in Tables B, C, and D.
SECTION 502-5101-201
TABLEA
TELEPHONE SET COLOR CODES
COLOR
CO LOR SUFFIX
Black -03
Ivory -50
Green
-51
Red -53
Yellow -56
White -58
Pink -59
Light Beige -60
Light Gray -61
Blue -62
Turquoise -64
3. IDENTIFICATION
GENERAL
3.01 The code number and assembly date are
stamped on the base of each telephone set
(see Fig. 7). Double code. numbers (e.g., NE-500
CID or CR/DR) permit field conversion from
rotary dial to manual operation .or vice versa,
without changing the code number stamped on the
base of the set. The letter R indicates that the
telephone set is equipped with a spring type
retractile handset cord. The R - marking has been
discontinued on telephone sets of recent
manufacture.
TELEPHONE SET IDENTIFICATION
3.02 NE -500DR. The NE-SOODR telephone set is
the basic rotary dial single-line desk set. The
set components include an NE-G3AR handset, a
QDB 1 type dial, and NE-425QE1 network, a
3-conductor mounting cord and an NE-C4 type
ringer with adjustable volume control. The
NE-SOODR telephone set is shown in Fig. 9.
Page 7

SECTION 502-5101-201
LINE
SWITCH
COVER
EARS
NE - G3AR
HANDSET
i.--RINGER
VOLUME
CONTROL
Fig. 8 - NE-554BR Telephone Set With Housing Removed
Page 8
~
0
I
..
0
.,

SECTION 502-5101-201
Fig. 9 - NE-500DR Telephone Set
3.03 NE-500CR. Thy NE-SOOCR telephone se t is
identical to the NE-SOODR telephone set,
except the rotary dial is replaced with an NE-9SB
apparatus blank and the set is wired for use with
manual telephone systems.
3.04 NE-500DQJ A. The NE-SOODQlA
telephone set is identical to the NE-SOODR
telephone set, except it is equipped with a QDB1C
all-number dial.
3.05 NE-500DQJB. The NE-SOODQlB telephone
set is identical to the NE-SOODQ IA
tel eph one set, except it has a grounding button.
3.06 NE-500QD. The NE-SOOQD telephone set is
identical to the NE-SOODR telephone set,
except it is equipped with an NE-C4Q3A ringer
which has no external volume control.
3.07 NE-500FR. The NE-SOOFR telephone set is
identical to the NE-SOODR telephone set,
except it is equipped with a modifi ed line switch
and is wired to avoid interference with the dialing
or talking of another subscriber on a multiparty
line. Wh en the handset is lifted off-hook, a low-loss
receiver circuit is bridged across th e line due to
partial operation of the line switch. If the line is
not busy, or if an incoming call is to be answered,
the left plunger (Fig. 10) is pulled up fully to
complete the operation of the line switch,
completing the talking and dialing circuit.
Replacing the handset restores both the line switch
and monitor switch to the unoperated position.
Fig. 10 -NE-500FR Telephone Set Housing
Page 9

SECTION 502-5101-201
3.08 NE-500ER. The NE-SOOER telephone set is
identical to the NE-SOOFR telephone set,
except the dial is replaced with an NE-9SB
apparatus blank and the set is wired for use with
manual telephone systems.
3.09 NE-500FRN. The NE-SOOFRN telephone
set is identical to the NE-SOOFR telephone
set, except the instructions between the line switch
plungers are printed in both English and French.
3.10 NE-500MR. The NE-SOOMR telephone set
is identical to the NE-SOODR telephone set,
except the mounting cord has four conductors.
The NE -IAl , and NE-1A2 Key Telephone System
(KTS) control leads in the mounting cord are
bridged on the terminal strip to the line switch
assembly contacts. The NE-SOOMR telephone set
may be rewired for audible ringing by using a
separate pair of leads.
3. 11 NE-500LR. The NE-SOOLR telephone set is
identical to the NE-SOOMR telephone set,
except the rotary dial is replaced with an N&9SB
apparatus blank and the set is wired for use with
manual telephone systems.
3.12 NE-500SR. The NE-SOOSR telephone set is
identical to the NE-SOODR telephone set,
except it has additional line switch contacts for A
lead control and a I0-conductor NE-D1 OH
mounting cord for connection to a QUSI type
hands-free unit , an NE-3 type speakerphone,
and NE-lAl KTS, and NE-1A2 KTS.
3.13 NE-500RR. The NE-SOORR telephone set is
identical to the NE-SOOSR telephone set,
except the dial is replaced with an NE-9SB
apparatus blank and the set is wired for use with
manual telephone systems.
3.14 NE-500YR. The NE-SOOYR telephone set is
identical to the NE-SOODR telephone set,
except it is equipped with a lamp which provides a
message-waiting feature. The visual signal
indication from the COO 11S13 neon lamp which
protrudes through the housing into an amber cap,
is controlled by the attendant at the
message-waiting cabinet. General application of
Page 10
this telephone and its feature are in hotel/motel
installations. The transmission, ringing, dialing and
message-waiting indication circuits for the
NE-SOOYR telephone set can be energized through
a common pair of wires.
3.15 NE-500WR. The NE-SOOWR telephone set
is identical to the NE-SOOYR telephone set,
except the rotary dial is replaced with an NE-9SB
apparatus blank and the set is wired for use with
manual telephone systems.
3.16 NE-500YQJA. Th e NE-SOOYQlA
telephone set is identical to the NE-SOOYR
telephone set, except it has an MD2993
pushbutton which, when depressed, may be used
for signaling.
3.17 NE-500YQB. The NE-SOOYQB telephone
set is identical to the NE-SOOYR telephone
set, except it is supplied with a QDB 1C all-number
dial.
3.18 NE-500PRN. The NE-SOOPRN telephone
set is identical to the NE-SOOYR telephone
set, except the message-waiting lamp is powered by
24 V de. Power is supplied on a separate pair of
leads, independent from the common pair of
conductors serving the transmission, dialing, and
ringing circu it s.
3.19 NE-500NRN. The NE-SOONRN telephone
set is identical to the NE-SOOPRN telephone
set, except the rotary dial is replaced with an
NE-9SB apparatus blank and the set is wired for
use with manual telephone systems.
3.20 NE-501 CR, DR, ER, and FR. The
NE-SOlCR, DR, ER, and FR telephone sets
are identical to the NE-SOOCR, DR, ER, and FR
telephone sets respectively, except an NE-426A
electron tube is supplied to permit selective
ringing.
3.21 NE-502BR. The NE-502BR telephone set is
identical to the NE-SOODR telephone set,
except it provides an exclusion feature. The
exclusion switch assembly is activated by lifting
the left line switch plunger of the telephone set. To

restore the excluded service to normal, the plunger
is restored to its normal position or the handset is
placed on-hook. The NE-D6AA mounting cord
contains sufficient leads to permit connection to
either NE-lA1 or NE-1A2 KTS or the exclusion
circuit. The NE-502BR-6l telephone set is supplied
with an NE-D6AA-61 cord and can be modified for
use with data sets.
3.22 NE-502AR. The NE-502AR telephone set is
identical to the NE-502BN telephone set,
except the dial is replaced with an NE-95B
apparatus blank and the set is wired for use with
manual telephone systems.
3.23 NE-502QA. The NE-502QA telephone set
(Fig. 11) is identical to the NE-502BR
telephone set, except it is equipped with an
MD2993 pushbutton which, when depressed, may
be used for signaling.
3.24 NE-51OBR. The NE-5 IOBR telephone set is
identical to the NE-500DR telephone set,
except it has two separate lines which are selected
by a turnbutton-pushbutton. Depressing the
SECTION 502-5101-201
button provides momentary connection between
two contacts for signaling. To permit incoming-call
audible signaling on both lines, an external ringer
may be connected to the second line. The
turnbutton can also serve as a transfer or cutoff
key on lines, line extensions, ringers, etc. The
features extend to the connecting block through
the NE-D6AA mounting cord, which is connected
to the terminal strip within the telephone set.
3.25 NE-510AR. The NE-510AR telephone set is
identical to the NE-51 OBR telephone set,
except the dial is replaced by an NE-95B apparatus
blank and the set is wired for use with manual
telephone systems.
3.26 NE-51OFR. The NE-51 OFR telephone set is
identical to the NE-51 OBR telephone set,
except the NE-51 OFR is equipped with a
lift-to-talk- and-dial plunger as described for the
NE-500FR telephone set. (See 3.07 .)
3.27 NE-51 OER. The NE-51 OER telephone set is
identical to the NE-51 OFR telephone set,
except the rotary dial is replaced with an NE-95B
Fig. 11 -NE-502QA Telephone Set
Page 11

SECTION 502-5101-201
apparatus blank and the set is wired for use with
manual telephone systems.
3.28 NE-510QA. The NE-51 OQA telephone set is
identical to the NE-5 1OFR telephone set,
except it is provided with an MD2993 pushbutton
which provides the features described for the
NE-502QA telephone set. (See 3.23.)
3.29 NE-51 lDR. The NE-51 lDR telephone set is
identical to the NE-5 1 OBR telephone set
(see 3.24), except it is equipped with an
exclusion-switch assembly which is activated by
lifting the left line switch plunger. The NE-D 16QA
mounting cord extends the control leads from the
terminal strip and network to facilitate connection
to the QUS1 type hands-free unit, the NE-3 type
speakerphone, NE-IAl KTS, NE-1A2 KTS and
exclusion circuits. The NE-51 IDR telephone set
may also be used with data sets.
3.30 NE -511CR. The NE-51 ICR telephone set is
identical to the NE-51 IDR telephone set,
except the rotary dial is replaced with an NE-95B
apparatus blank and the set is wired for use with
manual telephone systems.
3.31 NE-511DQA. The NE-51 lDQA telephone
set is identical to the NE-51 lDR telephone
set except it uses a QDBID all-number dial.
3.32 NE-2500D. The NE-25000 telephone set is
identical to the NE-SOODR telephone set,
except it has a DIGITONE dial. All components,
except the housing, faceplate, dial, and dial
bracket, are interchangeable between the NE-SOOD
and NE-25000 telephone sets. The NE-25000 is
shown in Fig. 1.
3.33 NE-2500MQA. The NE-2500MQA
telephone set is identical to the NE-25000
telephone set, except for the NE-D4BJ
4-conductor cord which permits connection to
either an NE-IA1 or NE-1A2 KTS. The
NE-2500MQA telephone set may be modified on
the terminal strip within the1set to obtain audible
signaling on a separate pair of _leads.
Page 12
3.34 NE-2500SQA. The NE-2500SQA telephone
set is identical to the NE-25000 telephone
set, except for additonal line switch contacts and a
10-conductor NE-D 1 OH cord necessary for
connection to the QUS 1 type hands-free unit, the
NE-3 type speakerphone or NE-lAl, and NE-1A2
KTS.
3.35 NE-2500 YQA. The NE-2500YQA
telephone set is identical to the NE-25000
telephone set, except for the message-waiting lamp
on the face of the set. The features and their
operation are identical to those described for the
NE-SOOYR telephone set for rotary dial systems.
(See 3.14.)
3.36 NE - 2511 DQA. The NE-251 lDQA
telephone set is similar in appearance to the
NE-25000 telephone ·set. The NE-251 IDQA
telephone set is equipped with an NE-584AQA key
(turnbutton-pushbutton) and an exclusion switch
to provide the features as described for the
NE-5 1 lDR telephone set. (See 3.29.)
3.37 NE-554BR. The NE-554BR telephone set is
a single-line wall telephone set. (Fig. 12.)
The set components include an NE-63AR handset,
a QDB 1 type dial, an NE-425QE1 network, and an
NE-C4 type ringer with adjustable volume control.
3.38 NE-554AR. The NE-554AR telephone set is
identical to the NE-554BR telephone set,
except the dial is replaced with an NE-95B
apparatus blank, (Fig. 6), and the set is wired for
manual service.
3.39 NE-593BRW. The NE-593BRW telephone
set is identical to the NE-554BR telephone
set, except it is not equipped with a ringer.
3.40 NE-503ARW. The NE-593ARW telephone
set is identical to the NE-554BR telephone
set, except it is not equipped with either a ringer or
a dial. The dial is replaced by an NE-95B apparatus
blank and the set is wired for manual service.

SECTION 502-5101-201
Fig. 12 - NE-554 Type Wall Telephone Set
Page 13

SECTION 502-5101-201
3.41 NE-554QD. The NE-554QD telephone se t is
identical to th e 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 th e 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 subscr ib er on a party
line. When the handset is lifted, a low-lo ss receiver
circuit is bridged across th e line due to partial
operation of the line switch. If the line is not busy,
or if an incoming ca ll 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 (M D). Th e NE-556FRN ( MD)
telephone set is identical to th e
NE-554FRN telephone set, except it has an
NE-426A electron tube, and is intended for 4-party
se lective 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. The signal switch leads are
connected to a P338886 terminal strip located on
th e dial bracket.
3.45 NE-55JBQJA. The NE-554BQ1A telephone
se t is identical to the NE-554BR telephone
set, except it has a QDB 1C 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. Th e ground switch is
wired b et ween tip and ground. Depre ss ing the
switch button connects one side of the li ne 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
Pa ge 14
the di al pulses for u se in speakerphone systems. In
ad dition, the NE-558DR telephone set is equipped
with an exclusion switch and an NE-584B
turnbutton-pushbutton. Holes are provided in th e
baseplate for mounting an NE-659A transmitter
for u se in home communication systems. Th e
exclusion switch and turnbutton-pushbutton
provide the following services:
(a) The exclusion switch provides a means of
disconnecting an extension station by raising
the plunger projecting through the top of the
housing. The switch returns to normal when th e
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) Th e 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 signali ng.
3.48 NE-558CR. Th e NE-558CR telephone set is
identical to the NE-558DR telephone set,
except the dial is replaced with an NE-95B
apparatus blank, and th e set is wired for manual
service.
3.49 NE-558DQA. The NE-558DQA telephone
se t is identical to the NE-558DR telephone
set, except it has a QDB 1D all-number dial.
3.50 NE-2554B QJ A. 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-35Q3A1
DIGITONE dial. Left and right dial-mounting
adapters are required to mount the dial.
3.51 NE-2558DR. Th e NE-2558DR telephone
set is the standard 2-line DIGITONE wall
set, (Fig. 2). It is identical to th e NE-558DR
telephone set except it is equipped with an
NE-35Q3G (MD) or NE-35Q3Al DIGITONE dial,
and a P096C204 2-line sw itch, which a ll ows th e A
lead to be sw itched when changing lines. .

TEL E PHO NE SET
DIAL ELEC.
ALL TUBE
NUMBER
MAN U AL
ROTARY DIGITONE NUMBER 4·PARTY KEY SPEAKER· LIFT-TO· OF LINES
SI G NALING
CALLING SEL . RING SYSTEMS
PHONE TALK PI C KED UP
C IR C UIT
NE-501C' R -• NE·501DR·* ...;
I
NE-501 ER ·* NE-50 1 FR·*
...; ...;
I
NE-502AR·* NE·502BR·*
...; I
NE·502AR·*
NE-502 B R·* ...; I
NE-502 Q A·*
I
NE-510A R ·* NE-510BR·* 2
NE-510A R ·*
NE-510B R -• I
...;
NE-510A R ·*
NE·5 10 BR -•
I
...;
NE-510AR·*
NE·5 10 BR -• I
.
NE-510A R ·* NE-5 1 0BR·* I
NE-510E R·• NE-510FR·* 2
...;
NE·5 1 0E R ·*
NE-5 1 0FR·*
2
NE·5 1 0E R -• NE·5 1 0FR·*
I
...;
NE·5 1 0E R -• NE-510 FR ·*
I
...;
NE-510QA·*
I
NE-51 I CR·*
NE-51 ID R·* NE-2511 DQA·*
\
...; ...; 2
...;
NE-5 1 ICR·* NE·5 1 ID R·* NE - 25 11 DQA·*
...; ...; 2
...;
NE-51 IC R ·* NE-5 1IDR ·* NE-25 11 DQA·* ...; ...;
2
...;
NE-51 lCR·*
NE - 51 lD (l· *
NE - 25 11 DQA·* ...; ...;
I
...;
NE - 51 lCR·* NE-51 lD R ·* NE-25 11 DQA·*
...;
...;
1
...;
NE-51 lCR·*
NE-5 1 ID R ·* NE·2511 DQA·*
...; ...;
I
...;
NE·5110QA·* ...;
...;
...;
I
...;
• W hen o r de r in~ t he t elephone set the desi r ed co lor mus t be specifie d using t he su ffixes inT ab leA.
.
RINGER OR
COMMON OR BUZZER
LINE
PRJV ATE LINE EX C LUSION CUTOFF
RINGER
RINGER OR BUZZER BYEXCL .
I
...; ...;
...;
...;
...;
...;
...;
...;
...;
...;
I
...;
...;
...;
...;
...;
...;
...;
v
...; ...;
...;
...;
...;
...;
...; ...;
...; ...;
I
~
SECTION 502-5101-201
TABLED
ONE-BUTTON DESK TELEPHONE SET FEATURES
(Double-Line or Additional Equipment)
CUT OFF BY KEY
RINGER OR
EXTENSION QBB1A
BUZZER STATION AUXILIARY CONN . G ROUND
INSET
OR R INGER RE C EIVER BLK . BUTTON
...;
...;
...;
...;
...;
...;
...;
...;
...;
...;
...;
...;
...;

-
-..J
TELE PHO NE SET CODE
ROTARY DIGITONE MANUAL
NE-SOODR-*
NE-25000-* NE- SOOCR -*
NE-SOODQIA-*
NE-SOODQ I B-*
NE-SOOFR-*
NE-SOOER-*
NE-SOOFRN-*
NE-SOOMR-*
NE-2500MQA-* NE-SOOLR-*
NE- SOOQD-*
NE-SOOSR-* NE-2500SQA-* NE-SOORR-*
NE-SOOYR-*
NE -2500YQA-* NE -S OOWR-*
NE-SOOYQ IA -*
NE-SOOYQB -*
NE - SOOPRN-*
NE-SOON RN-*
TABLEC
NONB UTTON DESK TELEPHONE SET FEATURES
(Single-Line)
DIAL LIFT
-T O-TALK
MARKING
AL PH A- ENGLISH KEY SPEAKER-
NUMERIC NUMERIC ENG LISH AND SYSTEM PHO NE
FRENCH
v
v
v v v
v v
v v
v v v v
v
v
v v
v v
• When ordering the telephone set the desired color musl be specified using 1lw suffixes in Table A.
Notes:
MESSAGE G ROUND
WAIT I NG BUTTON
v
v
v v
v
I. Equipped with NE-C4Q3A ringer and no external vo lu me <:Ontrol.
3. For Hotel
~4 V <l<: Syslcm mcssagt·-wailing lam p dn:uil.
2. Not equipped with a Ringer. 4. Equipped with neon lamp for message-wailing.
QBBIA
CONN.
BLK .
v
v
v
v
SEE
NOTE
I
4
2.4
4
3
3
{ll
Q
~
Vl
0
N
Vi
-
0
-
~
-

-
00
TEL E PHO NE SET
DIAL
MANUAL ROTARY DIGITONE
NE-554AR-* NE-554BR -• NE-2554 BQ IA-*
NE-593 ARW -* NE-593BRW-•
NE-554FRN-•
NE-55 4B QA-*
NE -5 5 4BQ IA -*
NE -55 4Q4A -*
N E- 558CR-* NE-558DR -* NE-2558DR-*
NE-558DQA-*
NE-556FRN-•
NE-155 4B -*
NE-554QD -*
TABLED
NONBUTTON AND ONE-BUTTON WALL
TELEPHONE SET FEATURES
ELECTRON
ALL TUBE NUMBER
NUMB ER 4-PARTY LIFT-TO-TALK
OF LINES
DIAL SEL. RI NG PICKED UP
I
I
.J
I
.J I
.J
I
I
2
.J
2
.J .J
I
I
I
• Whe n ordering t he telephone set the des ir ed col or must be specified using the suf fi xes in Table A.
t No Ringer volume control.
SI GN A LI NG LINE
CI RCU IT RINGER
.J
.J
.J .J
.J
.J .J
.J
.J
.J
.J
t
GROUND
EXCLUSION BUTTON
.J
.J
.J
Cll
m
~
0
2!
VI
0
N
I
VI
-
0
-
~
-

0
~
n 0
[J
0 0
0
© ( ) ©
0 0
0 0
08 <=:) 9
~@
0
o~
Fig. 13 -Present Production Baseplate (Wall Telephone)
t
I
- CE NTRE LINE
OF BASE PLATE
r-:1
1
~ I "
:; I~
l.1 ; sJ~z:
I IN . 1 .... - A-
-_'.__L - -- -y-
L+ 14::-11/ SI N.-j
~14-----'-3 5/ 161N.---+j
I
I
cp
Fig. 14 -Early Production Baseplate (Wall Te lephone)
Showing Drilling Location for Mounting Holes
SECTION 502-5101-201
Page 19

SECTION 502-5101-201
4. INSTALLATION
4.01 The telephone sets shall be installed
according to the appropriate sections.
Connection information for each type of telephone
set is located in the section entitled,TELEPHONE
SETS -TYPE CONNECTIONS.
4.02 Several holes are provided in the baseplate
of the wall telephone set to allow greater
flexibility in mounting and to minimize the use of
a backboard (Fig. 13). Baseplates of current
manufacture may be mounted on a conduit outlet
box. Baseplates of early production models require
modification.
4.03 To modify early production baseplates, drill
two holes as shown in Fig. 14 using a No.
17 (0.173 inch) drill bit. If a conduit outlet box is
not available, mount the telephone set with screw
anchors, using the mounting holes at the top and
bottom of the baseplate.
4.04 Refer to the appropriate section for
information on screw anchors suitable for
mounting wall telephone sets.
4.05 When connecting a telephone set to an
NE-lA, NE-lAl, NE- 1A 2, or NE-6A KTS , a
QUSl-type hands-free unit or an NE-3 type
speakerphone, refer to the connection section on
the particular telephone set being installed.
Page 20
5. MAINTENANCE
5.01 Maintenance of the telephone sets consists
of cleaning exterior surfaces, burnishing and
adjusting switch contacts, a nd replacing defective
components.
5.02 Housing, handset and dial pushbuttons can
be cleaned with a soft cloth moistened with
water. Do not use scouring powders or cleaners.
Replace plastic components if cleaning does not
have satisfactory results.
5.03 Check line and ground terminations, and
wire dressing before proceeding with
maintenance.
5.04 CO station ringer and dial test circuits
should be used where possible when
checking telephone sets.
5.05 Network and line switch assemblies are
riveted to th e baseplate. These assemblies
are not normally replaced in the field, however,
they can be replaced by drilling out the rivet and
using a No. 4 by 0.250 (P0970700) self- tapping
screw.
5.06 Chart l lists common troubles and their
probable causes, with suggested corrective
actions.

SECTION 502-5101-201
CHART 1 - FAULT LOCATION GUIDE
INDICATION PROBABLE CAUSE CORRECTIVE MEASURE
Ring er disconnected or in- Connect correctly. Refer to
correctly wired in set. appropriate connection section.
Volume control wheel in cut- Move control wheel
to ring
off position. position and advise customer
of cutoff position.
Open winding. R
ep la ce ringer.
Metal part icles in armature Remove with adhes iv e tape or
Bell does not ring. gap. approved equivalent.
Open tube. Short-circuit yellow and black
tube lead s. If ringer operates
when ringing voltage of correct
polarity is applied, r ep lace
tube.
Op en ringing capacitor. Repla
ce telephone set, or
bridge A&K terminals of the
NE-425QE1 Network with a
QCCl2A capacitor.
Bell too loud. Volume control wheel in
Move control wheel to softer
wrong position. position and advise customer
on proper use.
Volume control wheel in Move control wheel to louder
wrong position. position and advi
se customer
on proper use.
Bell too sof t. Set
on sound-absorbent Mount set
on hard su rface.
material.
Cord touching gong. Dress cord properly.
Page 21