Bell 701B User manual

r
BELL SYSTEM PRACTICES
S ta ti on Operat ions Ma n ual
S tation Sets
SECTION C38.
670 . 40
Issue 4, February , 1963
AT&TCo S
tandard
TELEPHONE SETS- 7 01 B
CONNECTIONS
1. 00 GENERAL
1.01
This section is reissued to:
• Add schematics for 4- and 8-party semi-
selective service.
•
Add "Read" note to Fig. 7.
•
Add reference to 1635A inductor .
• Add long line
circuit connections to Tab le
B.
1. 02 Due to extensive changes, marginal arrows
have been omitted .
1.03 The following figures and tables give the
connec tion information for the 701B tele-
phone set for the conditions shown .
Fig. Table
• Without Ringer, or Portable 1 A
2
• With E-Type Rin g er 3 B
• 4-
Party Selec t ive and 8-
Party Semiselec tive Service
(With 426A cold c athode
tube) 4 C
•
Severe Indu ction (425A cold
cathode tub e) 5 D
•
With F1A Ringer E
•
Wired for 1A1 Key Tele- 6
phone S
ys tem
•
Wir ed for 3A Sp eake rph one 7 F
1.04 To determine which type of identifying
ground is required on 2-party tip stations,
refer to section entitled Station Set s, Common
Battery Selection for General Use.
1.05
For tip-party identification when no ringer
is used, a 1610A or 1635A inductor is in-
stalled in the telephone set. For information on
installation of the inductor see section entitled
Telephone Sets 701 and 711, Installation.
1. 06 To convert the 701B telephone set from dial
to
manual, move two spade-tipped leads as
follows:
• S- W from terminal F of network to termi-
nal RR.
• W dial lead from terminal GN of network
to terminal Rl.
The dial remain s on the set.
The dial light transformer can be dam-
aged by lightning if a sufficient differ-
ence in ground potential occurs be-
tween the telephone plant and the
power system . Be sure that the tele-
phone and power grounds are bonded
in accordance with the section entitled
Protector and Signaling Grounds.
© Am e ri c an Telephone and Telegr ap h Comp any, 19(;3
P
rin ted in U.S. A. Page 1
l

SECTION C38.670.40
INSIDE
WIRING
CONN
BLOCK
OR
JACK
MTG TERM .
CORD* STRIPS
SWITCH ASSEMBLY
GRD (Y ) y
(Y)
(8 L)
4
(S - Rl
DI AL LIG HT {
T
RAN S 8
(8K)
(S - 8 Ll
TI P (G) G
(G )
Ll (S -G)
RING
(R) R
(R)
L2
(S -Y)
'
(W)
g
(S)
No te I: Dott ed lines ind ic at e connecti ons for ma nu al
~ e r v i ce . The dial remains on th e set .
Note 2: Gro und may be omitt ed if not req uir ed f or
se 1·vi ce; not nece ss a ry for prote c tion of dial lig ht
tran s form e r.
For po rt able ins tall a ti ons use D4BA or D4BE
cord, omit tin g BL a nd W co nd uc tor s.
CL OSE FOR
NI G HT LIG HT
e
d
k
b c
:Ja
g
DIAL
BA
(G )
(S-
8R )
(S - R)
(W)
(W)
(S - 8 K)
NETWORK 495A
GN
NOTE
I ~
Rl
HAND SET
G3AR
Fig . 1 -701 B Telephone Set without Ringer, or Portable
TABLE A
CONNECTIONS
FOR TELEPHONE SET WITHOUT RINGER
Individual Ring Tip
Party
Wire or l e ad
or Tip
with !d e nt Grd
Bri dg ed
Pa rty
Party
1000 [)
2500 !1
Line \\'ir e Ring R R R H R R
at Conn
Tip
G G G G G G
Block Grd y y y y y y
Tr ansfo rmer Lead s I y y y y y
at Conn Block 2 B B B B B
R R R R G G
G G G G H R
Mo un ting Cord y y y y y y
at Co nn Bl ock
BL
B B B B B
\V
R R H G G
BK B B B B B
R L2 L2
L2 L2 L2
G L l
Ll Ll Ll Ll
Mo untin g Cord y 3 3 3 3 3
at Se t
BL
~
4 4 4 4
\\'
D D D D D
BK
4 4 4 4 4
RK
3 3
I nductor
H B
TAPE
Le ad s at Set
s B B
Page 2
1000 fl 1500.Cl
BK
R
Fig. 2 - Schematic for
1610A or 1635A
Inductor
s

INSIDE
WIRING
EIA
RINGER
GRD (Y) 2
DIAL {J
LIGHT~
TRANS
TI P (G) 6
RING (R)
INDIVIDU AL
GRD
DIAL
LIGHT
TRANS
TIP
RING
TIP OR RING PART Y(SEE TABI
GRD (Y) 2
DIAL{~
L IG HT 4 (BK )
TRANS
IOOOfi
7
RING ( R) 5
TIP
(G)
TIP
PARTY WITH 1000-
GRD
(Y)
2
DI AL {
LIGHT
TRANS
RING (R I
TIP
(G)

... -- --- -- ---- -- ---
MTG
CORD TERM. STRIPS
2
SWITCH ASSEMBLY
(S - G)
6/
C LOSE FOR
N I
GHT LIGHT
( O- W)
( y )
3~
DIAL
LAMP
( B L)
( B K)
'\,4
(S-R ) J
"
(5- B L)
K
(G ) L l (S- G)
r--
e (
-a
(R )
L2
(S - Y)
~~d
(W) D (S)
•R B RIDGED
(Y)
3 (
(S- Y) •
(S)
'T
SEE
(5 - R
NOTE I
S
-W )
S- BRl
f
(S
(BL) 4
-BK )
(BK ) / - g
(G )
Ll
(S - G)
(R) L 2 (S-
Y)
r--
<W ) D
(S )
.E Bl
( Y)
3
}SEE
~NOTE I
( BL ) B
(NETWORK)
(G l L l (
S- G)
(R)
L2
(S Y)
1--
(W) D (S )
·
OH M I DENT GRD
(Yi 3 } SEE
~ N OT E I
( BL)
B
(NE T W ORK )
(
G)
Ll
(S - G)
( R)
L2
(S - Y )
r--
( W)
D (
S)
DIAL
SA NETWORK
495A
(W)
(W)
NOTE 2 Rj1
HAND SET
G3AR
TABLE B
ISS 4, SECTION C38. 670.40
N ote I: To di al lamp c ir c ui t as
sh own fo r individ ua l or b rid ged.
N ot e 2: D otted lines ind ica te co n-
nec ti ons f or ma n ua l se rvice. The
dial rema in s on the set.
N ot e 3: G roun d m ay be om it ted if
no t req uir ed for ser vice not neces-
s
ar y for pr ote ct ion of di al lig ht
transf o rm er.
Fig. 3-701 B Telephone Set
With ElA Ringer
LINE
AND RINGER CONNECTIONS WITH ElA RINGER
Tip Part y with ldent Grd
lnd i- R
inger R evers al When
W ire or le ad
vi dual Ring Tip
No r mal
Con ne cted to
01 Party
Party Conn e ction s
long Line Ckt
Bridged
1000 11 2650 !! 1000 0 I 2650 0
Line
l H
ing H 5 5 5 5 5 5 5
at
I T
ip
G 6 6 6 6 6 6 6
Ri nger j Grd y 2 2 2 2 2 2 2
R 7 7 7 7 l l 2
S-H 1 1 l 1 2 7 1
Ring er
BK 6 2 2 2 I 1 7
s 1 1 1 1 7 2 I
Capacitor
w 7 7 7 7 7 7 7
in Ringer y 5 5 6 3 3 3 3
Trans
fonner
1 2 2 2 2 2 2 2
Lead s 2 4 4 4 4 4 4 4
I H 5 5 6 6 6 6 6
Moun ting
G 6 6 5 5 5 5 5
GorJ y 2 2 2 2 2 2 2
at
BL
4 4 4 1 1 1 1
Ringer
w 3 3 3 3 3 3 3
BK 4 4 4 4 4 4 4
H L2
L2 L2 L2 L2 L2 L2
Moun ting
G L1 L1
Ll Ll Ll
L1 Ll
Co rd y 3 3 3 3 3 3 3
at
BL 4 4 4 B B B
ll
Set* \V D D D D D D D
Bl< 4 <I 4 4 4 4 4
Note: Use no rm al co nn ec tio ns on t ip- pa rt y ide nti fyin g gro un d s tat ions. If be ll ta ps on
stations
conn ecte d to long li ne e qu i pm e nt, use r in g-e r reversal column in Table B to
re tain t ip-par ty gro und id ent ifi ca tion.
''' Set wir ed at fa ct or y for ind iv id u al or b ri dged, rin g-, a nd tip-par ty se rvice.
Page 3
l
I

EIA MTG T ERMINAL
SWITCH
I NSIDE
WIRING RINGER
CORD STRIP
ASSEM B LY
(S-G)
NIGHT
LIGHT
SWITCH
(BL)
( BK)
(Y)
d
RING IR)
TIP (G)
TIP OR RING NEGA TIVE STATION
(S - G)
NIGHT
LIGHT
SWITCH
(BLI
4 ,-----------~(B~K~l ~
(Y)
(W )
RING
(R)
(S - Y)
TIP (G) 6
IG)
(S- Gl
SEE T ABLED
(Sl
0
TIP OR RING POSITIVE STAT ION
No te : D ot ted li nes indi cat e connec ti ons for manua l se rvi ce.
Dial re
main s in se t.
Remove W lead f rom D punching in set and connect to
BK tube l ead using· D-161488 connec tor .
Fig. 5-701 B Telephone Set with
425A Cold Catho de Tube
(Severe
Inductive Noise)
e
g
ISS 4, SECTION C38. 670.40
DIAL
N ET W ORK 495A
(S - Wl
IBLl
(S-Rl
(W) 1
( W) NOTE I ~ ~ '
~-o-- ----~~--------~~------~RI
loca -
tion
(S-BKl
TABLE D
4-PA
RT Y AND 8-PARTY
SE M ISELECTIVE SERVICE
W ire or le od
Line I Tip (;
I Grd Y
R itl g"t •r
Co il
L ead~
C apac itor
Leads
Mo untin g-
Co rd
:lO l:lA or
K S- 16 184
T ran ~
~ l o u n ting
Cord
425A
Tube
Leadi'
H
S. l{
s
BK
y
R
G
II '
y
RL
BK
G
H
H
y
BL
BJ.:
BJ.:
H
y
G
Ne gativ e
Stat ions
1 and 5 2 and 6
1"'
L1 L1
1,1
Ll
L2 L2
HAND SET
G3AR
Po sitive
Stations
3 and 7 4
and a
L 1 1.1
L2
1. 2 L2
1, 1
1.1
Remove W le ad from D punching in se t and connect to
BK tub e le ad using D-161488 conn ecto r.
Page 5
l

SECTION C38.670.40
c
0
·::
c
u
0
......
~
<1)
E-i
,..
Q)
bo
.5
~
~
'""
~
~
Q)
E-i
+'
<1)
w.
Wire or Lead
Ring
R
Line
Tip
G
Grd
y
R
S-R
Ringer Coil
BK
s
G
BL
Network
A R
Strap s B G
1
Dial Light
Trans
2
R
G
y
Mounting Cord
BL
w
BK
R
G
y
Mounting Co rd *
BL
w
BK
TABLE E
CONNECTIONS WITH
F1 A RINGER
Tip Party with Identifying Ground
lndi-
Ringer Reversal
vidual Ring
Tip
Normal Connections When Connected to
Party Party or
Long Line Circuit
Bridged
10000 26500 10000 2650 0
6 6 1 1 1 1 1
4 1 6 5 5 5 5
1 4 4 4 4 4 4
7 7 7 7 2 2 4
2 2 2 2 4 7 2
4 4 4 4 2 2 7
2 2 2 2 7 4 2
4 4 4 4 4 4 4
7 7 7 7 7 7 7
6 6 6 6 6 6 6
1 4 4 4 4 4 4
3 3 3 3 3 3 3
6 6 1 5 5 5 5
4 1 6 1 1 1 1
1 4 4 4 4 4 4
3 3 3 2 2 2 2
5 5 5 6 6 6 6
3 3 3 3 3 3 3
L2 L2
L2 L2
L2 L2 L2
L1 L1 L1 L1 L1 L1 L1
3 3 3 3 3 3 3
4 4 4 B B B B
D D D D D D D
4 4 4 4 4 4 4
The FIA ringer is not intended to be used uith 4-party selective or 8- party semiselective
service, or any other service where code ringing u: ould not be distinguishable in CHIME
position. For schematic drawing and maintenance information on FIA ringer, see C Sec-
tion entitled FIA Ringer.
Note: Use normal connection s on tip - party ground s tations. If bell t aps on sta tion s c onn ected to long lin e c ir c uit, u se rin ge r
rever
sa l co lumn in Tabl e B to re ta in tip - party gro und identifi ca tion .
* Wir ed at fa cto1·y for individual or b1·idged, ring ·-, and tip - party se rvi ce.
Page 6

INSIDE
WIRING
DIAL {
LIGHT
TRANS
TIP
{G)
SEE
NOTE 2
RI
NG
{Rl 5
A
AI
r
I SS 4, SECTIO N C38.670.40
EIA MTG TERM. SWITCH ASSEMBLY DI
AL NETWORK 495A
HAND SET
R IN GER COR D STRIPS
8A
G3 AR
2
4
6
3
(S-G)
CLOSE FOR
N IGHT L IG
HT
(Y ) D
IAL
LAMP
(BK) 4
{S- R)
{S - B Ll
{BL)
j
k
{ BK)
ST RAP
GRD
{R)
L2
{ S-Yl
D {Sl
{S - Rl
GN
{W)
{W ) NOTE
1~RI
•
(S - BK)
{W)
*
{S-W)
g e
(G)
{S -G)
d
~
( ~ ~ To pr eve nt fal se holding c ondition when hand s et
.a ~ ~ is rest or ed, swi tch c ontact s cb must break before
JL de br e ak s.
Note 1: Dott ed lin es indicate connections for manual service. The dial remains on the set .
Note 2: For individual lin e ringer, co nn ect BK to tip (6) and Y capacitor lead to ring
( 5). F or co mmon audible ringer, co nn ect to signal leads from equipme nt cabinet using
D-161488 connec tors.
Note 3: Ground may be omitted if n ot required for se rvi ce; not necessary for protection
of dial light transformer.
" Co nnect with D-161488 connecto r.
Fig. 6- 7018 Telephone Set Wired for 1A1 Key Telephone System
Page 7

SE CT ION C3 8. 670 . 40
TO 55A
CONTROL
UNIT
Page 8
8 Pages
INSIDE
WIRING
GRD (Y)
CONN MTG TERM.
BLOCK CORD STRIP SWITCH
ASSEMBLY
CLOSE FOR
NIGHT LIGHT
DIAL
SA
NETWORK 495A
[ . '"
DIAL
LAMP
Rl
A OR
AG
6
(R)
(BL)
MIW CORD
(S- BR)
c
TO
CO
PBX
lA ,I AI ,
'0----('-c S _--:-Y_) ---<~ b
(S) a(S - W)
D
OR 6A TIP
LINE
(S-RI
(W)
TO c 7 (W)
XMTR ---~~--~~-~
f (S-BK)
g~~~~-----------------------~
( W)
UNIT
(G)
e
~T~'-----~~-~(G~)---L~I---(~S_-~G~)~d
2
~
R ~
E
~ A
To prevent false holding condition when handset
is restored, switch contacts cb must break before
de breaks.
D
JL
Note I: Dotted lines indicate connections for manual service. The dial remains on the set.
Note 2: Ground may be omitted if not required for service; not necessary for protection
of dial light transformer.
··· Connect with D-161488 connector.
Fig. 7- 701 B Telephone Set Wired for 3A Speakerphone
TABLE F
7018 MODIFICATION TELEPHONE SET
FOR 3A SPEAKER ·PHONE
Lead From
To
BL Mtg Cd 4 D Conn (S-BR)
(S-BR)
Swhk
c
BL Mtg Cd D Conn
R
Mtg Cd L2 F
(S-W) F c
Note: Strap 3 to L2 term. strip.
HAND SET
G3A R
,