Webster Electric Teletalk 700 Series User manual

installation
series 700
Teletalk
bulletin M7D 1
STATION
SPEAKER
STATION
INSTRUCTIONS
/Mde~~
TELETALK SERIES 700
This bulletin contains complete instructions for in-
stalling Series 700 Teletalk Intercommunication
units. Before starting the actual installation, read
the instructions thoroughly and check each unit care-
fully to be sure it is the correct unit for the power
supply and for the use required. All installation
work should be neat and workmanlike to match the
fine quality of the Teletalk units.
TABLE OF CONTENTS
Page
Identification of Models 2
Cabling and Connecting
Instructions. 3
Teletalk Series 700 Installation . . . 5
Annunciator and Switching
Circuit Connections 11
Speaker Station Connections .... 13
Circuit Variations and Connections 14
Operating Instructions 17
Hum and Noise 18
Name Strip . . 18
WEBSTER
"Where quality is a responsibility and fair dealing an obligation"
ELECTRIC
RACINE, WISCONSIN
Established 1909

SERIES 700 TELETALK
IMPORTANT INSTALLATION INSTRUCTIONS
Before starting the installation, check each unit to be sure it is the
correct one for the power supply at each location. The label inside
the cabinet will indicate whether the unit is 117-volt 60-cycle, 230-
volt 60-cycle, or 117-volt 25-cycle.
Make a detailed layout of the complete system to show exactly where
each unit will be located and what type of unit it will be.
When difficulties arise which require trouble-shooting any circuits
inside the units, refer the unit to authorized repair men. Do not
remove back cover and attempt to make changes or repairs to the
equipment.
IDENTIFICATION OF MODELS
TELETALK INTERCOMMUNICATION SYSTEMS
Teletalk systems are made up of two or more "Sta-
tions" joined by interstation wiring. These stations
may be either "Master Stations" or "Speaker Sta-
tions ," depending on the type of system employed,
and the kinds of intercommunication desired at each
particular point where a station is to be located.
TELETALK MASTER STATIONS
A
"Master station" consists of a cabinet containing
an amplifier, a speaker-microphone, and the neces-
sary switches and controls for operation in the par-
ticular type of system employed. A Master Station
requires an alternating-current power supply.
The Master Stations can originate calls with other
Master stations or Speaker Stations. Master Station
units are used at all points where it is necessary
to communicate with several other stations. The
number of stations which can be called varies from
6 to 48 depending on the model used. Master stations
are designed for "s" circuit and "M" circuit appli-
cations .
The "M" circuit is not secretive - any Master unit
can monitor a Speaker unit or another Master Station.
Any Master can listen in on conversations between
any other two units. However, the "-14" Silencing
circuit can be used to prevent "monitoring."
An "S" circuit is secretive. Conversations between
two Master Stations cannot be listened to by any
other station, nor can any Master station "monitor"
any other except when set up for conference.
Several variations of the Master station unit are
available to meet special conditions and are described
in the section "Circuit Variations and Connections. "
A
"Speaker station" consists of a cabinet containing
a speaker-microphone only and no amplifier. It,
therefore, can be used to converse only with a
Master and not with another Speaker station. Two-
way
conversation is possible from Speaker stations
to the "M" circuits of a Master station. When
2
Speaker Stations are connected into the "S" circuits
of a Master only onll-way conversation is possible
from Master to Speaker. It is possible to originate
a call to a Master from each Speaker equipped with
either an annunciator push button or Call-In switch.
MASTER STATION CODE SYSTEM FOR
MODEL IDENTIFICATION
The Teletalk Key Number or Coding System is de-
signed to combine all the necessary information on
a
particular model, its variations, and equipment
into a single Code Number.
The "Basic Model" code number gives only the series
Number and Capacity Number (Number of Stations).
Table 1
No. added to
Capacity
series number
06 6-station
12 12-station
24 24-station
48 48-station
Other letters, and numbers preceded by a dash are
used in the code number to designate model varia-
tions as indicated.
Table 2
Variation Number Variation
A Annunciator
C Earphone
LBusy signal
T Telephone handset
-V 230 volts A.C.
-z
25-cycle
-1 All-call switch
-3
Three-position selector switches
-6
500-ohm voice line
-14 Silencing circuit
-15 Paging key
-18
All-call paging

INSTALLATION
TYPICAL CODE EXAMPLE
The following example shows how a typical code may be made up
of
Series Number, Capacity (Number of Stations), and Model Variation
Letters or Numbers.
Example
7
..
700 Series
06
..
6-Station
Capacity
A V
.. ..
Annunciator 230- Volt
-1
..
All-Call
Switch
-3
..
3-Position
Selector Key
INTERSTATION CABLE
CABLING
AND CONNECTING INSTRUCTIONS
NOTE
Webster Electric inter station cable is made espe-
cially for Teletalk installation. It is constructed of
No. 22
soft-drawn copper wires. Each pair of wires
is color-coded and is twisted. This twist has been
found to be best to prevent crosstalk and noise
pickup on voice lines. Over all the wires is a vinyl
plastic covering. Webster Electric cable is available
with 6, 9, 15 and 27 pairs of wires. The following
table shows the Teletalk cable diameter and the
size of metal conduit recommended.
Taletalk
Cable Diameter Wire Size Conduit Size
6 pair
9/32 in.
No.
22 1/2 in.
9 pair
5/16 in.
No. 22 1/2 in.
15 pair
3/8 in.
No.
22
1/2 in.
27 pair 1/2 in.
No. 22 3/4 in.
The length of cable run between statIOns wlll deter-
mine the wire size used for both voice lines and
annunciator lines. Based on an allowable 6DB. line
loss, the following lengths and sizes may be used
with these Teletalks for voice circuits.
Wire Size Length (pair of wires)
No. 22 2,000 feet
No. 19 4,000 feet
No. 16 8,000 feet
No. 14
12,000 feet
When long runs between stations are necessary, 500-
ohm impedance units should be used throughout the
system. With 500-ohm impedance units, the wire
length given above may be multiplied by ten. For
example, with 500-ohm impedance unit, No. 22 wire
- 20,000 feet.
In any Call-In circuit, including 500-ohm systems,
the D. C. line re sistance should not exceed 35 ohms.
Use a wire size large enough to obtain this value or
wires can be paralleled to lower the line resistance.
From the above table it can be seen that No. 22 wire
may be used up to 3,000 feet if a slight loss in vol-
ume is not objectionable. Do not use cheap inter-
station wiring as it will only prove a source of
trouble in time.
45-ohm speaker-microphones are used in the
Teletalk units because of the much lower line
loss incurred. This line loss is only 1/9
that of a 5-ohm speaker-microphone unit.
The wrappings on the wire should be held with
shellac to prevent unraveling of the insulation at the
terminal strips. Keep the interstation wiring as far
as convenient (at least 12 inches) from any parallel
power or telephone wires to prevent interference
which might be picked up from these lines and
amplified at the master unit.
All voice lines should be twisted pair wires. Never
use a common wire to connect a number of speaker-
microphone units. Interstation wires should be run
so that they do not cross hot metal pipes and where
there is no danger of cable being covered with water.
TELETALK TO JUNCTION BOX CABLE
The cable connecting the junction box to the Tel-
etalk unit consists of plastic insulated wire. .Each
pair of wires is color -coded and twisted. Over all
the wires is a cotton-braided covering. The cable
used on 12-station models is coded as follows:
Pair No.
Conductor Mate
1 Light Blue White
2
Dark Blue
White
3
Orange White
4
Light Green White
5
Dark Green
White
6
Light Brown White
7
Dark Brown White
8
Light Slate White
9
Dark Slate White
10
Pink White
11 Yellow White
12
Purple White
Home
Line
Dark Green Light Green
Ground Black
Spare Dark Brown Light Brown
Spare
Red
The cable used on 24-station models consists of the
above plus the first twelve colored wires paired
3

SERIES 700 TELETALK
with red mates. The cable used on 12-station an-
nunciator models consists of the above wires plus
the first twelve colored wires for the annunciator
circuits, and their red mates for the (-3) switching
circuits. On six-station models the first six colored
wires paired with white mates, plus the green
pair, black and spare wires are included in the
cable.
RCUIT
ES
CALL-IN
LINES
SPEAKER
STATIONS
5G45R
MASTER
-
~
STATIONS
•
o~
-*
f' ~
"M"CI
-
~
1-
.... ",~ ....
'r-
_GREEN ~
~2
4
D--
PAIR
-
l-4i
345 67 8 9 I I
~ • C> ..
IT - *
'\. -- -::.
- ~
-
~~
-- ~ ........ t-
.rr::
... .-. ....... ~
.~
-, 0
-
I·
~
'"
...
-*
-
r": ~
* CALL-IN LIN
~
..L
_.... .. ""' .... ~
I- I-
:;0.- ~
=.j 0
-•
-........
~
-
~'L".
.....L
...... t. ...... ~
....
• • 0
-
"
GROUND TO
WATER PIPE OR
FLOATER
OTHER GOOD
GROUND
~
~-
\-
.~
~ _.~
a> ..
--
~
"-
r::::- ~
.~
otr::
'"'"
.o~
'" -
'" -
,1
CALL-IN
II
-1
LINES
•
•
•
Figure 1. Combination "M" and "s" System or all ''M'' System Layout
using CALL-IN Type SPEAKER STATIONS
4

INSTALLATION
TELETALK SERIES 700 INSTALLATION
SYSTEM LAYOUT
Before actually making a Teletalk installation, pre-
pare alayout to show where each Master Station
and
Speaker Station will be located similar to the
Typical Teletalk System Layout (Figure 1). The
number of Master Stations and Speaker Stations may
be
varied to suit individual requirements. The total
number of stations which can be connected to any
Master Station is controlled by the number of Selector
switches as indicated by the Series code number.
At Station No. 1 connect the terminals to which
the
twisted green pair of wires are attached, to
No. 1 terminals of all the other Master Stations.
Connect No. 2Station green pair terminals to No.
2
terminals at all the other Master Stations. Connect
the
remaining Master Stations the same way as
shown in Figure 1.
To prevent the possibility of cross talk, wherever
practical, keep Master Station cables separated
from Speaker Station Voice and Call-In lines.
LOCATION OF UNITS
Install each Teletalk Master Station unit in a con-
venient place at the location desired. Be sure that
a power outlet receptacle is available and that the
current and voltage of the power supply is within the
limits specified on the Teletalk being installed. Plug
the unit into the power receptacle.
Select the line number to be assigned to each station
and make a record of the names to be placed on the
name strip.
COMBINATION "M" AND "S" CIRCUITS WITH THE
CALL-IN FEATURE
Connect
Speaker Station Voice lines in parallel to
consecuti ve terminals, starting next to the "Call-In"
terminals, which are the' last numbered ones on
the
strip, as shown in Figure 1, thus assigning
speakers to the higher numbered selector keys.
The Call-In switch of one Speaker Station can be
connected to only one Master Station in a system.
Any number of speaker Call-In switches can be con-
nected to one master. Connect speaker Call-In
switches to Master Call-In terminals (last numbered
in terminal box). Ground each Master Station from
the end (ground) terminal to a water pipe or other
suitable ground. This ground connection should be
as close to the terminal box as possible.
PREPARATION OF SWITCH PANEL
CONNECTIONS
When
the stations have been selected, arrange to
connect all Master stations to the Selector switch
starting with number 1and up consecutively. The
number of Selector switches to be assigned to masters
will be one less than the total number of masters
in the system. Call one master a "Floater" and
assign a number to the others.
When all connections have been made, remove the
Selector switch panel from the front of the unit.
Cut the looped common wires connecting the Selector
switches between the last "s" circuit Master Station
and first "M" circuit Speaker Station and insulate
and bend these wires to one side. (See Figure 7.)
The cutting of the jumpers is necessary in order
that all Master Stations will fW1ction as "s" circuit
W1its.
Connect voice lines from the "Floater" Station to
other Master Stations at terminal No. 1 at Station
No.1, terminal No. 2 at Station No.2, and in this
same manner to the other Master Stations.
The panel is removed by turning a latch, located at
the top of the panel, with a screw driver. After
the latch disengages the cabinet front, tilt the switch
TERMINAL BOX COVER -+i! •• liiiliiii!! ......... ~.~. ;:~ •• =.
CABLE TO
MASTER
STATION
TERMINAL
STRIP
COLORED WIRES --i~~~~~~~~~~iii~~~~~~~~::::::
12-VOICE
TERMINAL PAIRS
WHITE WIRES
(SAME FOR I-STATION MODEL. BUT ONLY'
PAIRS 0... VOL'CE TERMINAL!I ARE USED.)
Figure 2. Teletalk Terminal B\lx - 6- and 12-Station Units
5

SERIES 700 TELETALK
BLACK
WIRE
CUT HERE & INSULATE TO REMOVE
BUZZER CIRCUIT
VOICE
LINES
Figure 3. Connections to be cut
for an all "s" Circuit System
DO NOT CUT
BUZZER LEADS
BLACK
WIRE
Figure 4. Connections to be cut for an
all "s" Circuit System (Annunciator Circuit)
panel back using the bottom of the cabinet opening
as the hinge. (See Figure 6.)
If, at a later date, the number of assigned Master
BACK OF
RIGHT FRONT
PANEL
CUT HERE
.,.. L.EFT "'''ONT PANEL. IS Jl'OR MASTERS
OtiLV AND RIGHT FRONT PANEL, Jl'OR
SPEAKERS ONLY
and Speaker Stations is changed, connect the cut
common
wires back to the proper switch terminals
and again cut the common wires between the last
"s" circuit Master Station and first "M" circuit
BACK OF
LEFT FRONT
PANEL
CUT & INSULATE
,,, COMMON JUMPERS
ARE CUT ON RIGHT PANEL.
Figure 5. Connections to be cut on a Two-Panel Teletalk
6

INSTALLATION
COMMON LOOPED JUMPERS ----::::::----l+-_
SCREW FASTENER RELEASES
SWITCH PANEL
SELECTOR SWITCH
PANEL SWINGS OUT---_--\
Figure 6. Front Switch Panel Removed
Figure 7. Top View of Switch Panel
Showing Looped Jumper Wires
o
CUT THESE
JUMPERS TO
SEPARATE NO.
3
8< 4 SELECTOR
SWITCHES.
Speaker Station. Remember that "S" circuit Master
Stations are always assigned to the low numbered
selector keys and the "M" circuit Speaker Stations
are always assigned the high numbered keys.
If the Master Station has two panels and the common
wires to be cut are on the left front panel, also cut
the yellow pair of wires connecting the right front
panel to the plug. If the common wires to be cut
are on the right front panel, cut the blue pair of
wires connecting the left front panel to the plug.
If the left front panel is for "s" circuit masters
only and the right front panel is for "M" circuit
speakers only cut the yellow pair from plug to right
front panel and the blue pair from the plug to the
right front panel. These wires should be cut at the
switches and taped. (See Figure 5.)
COMBINATION "M" AND "s" CIRCUITS WITHOUT
THE CALL-IN FEATURE
CONNECTIONS
The connections for a combination "M" and "s"
circuit installation using Speaker Stations (5G45)
without
the Call-In feature are the same as the con-
nections for a system using Call-In, with the ex-
ception that the Call-In lines are deleted (see Fig-
ure 10). If desired, the Call-In selector key can
be used for an "M" circuit station. If the Call-In
selector key is not to be used for an extra "M"
circuit station no connection should be made to the
Call-In terminals in the junction box, or the CaH-
In
circuit should be isolated by removing the buzzer
circuit leads from the Call-In switch.
'1

The preparation of the Master Station switch panel
is the same as for a master in a system using
Call-In except that the Call-In selector key switch
must be prepared if it is to be used for an extra
"M" circuit station. To do this, cut and insulate
the single blue plastic and black wires (buzzer
circuit) from this switch as shown in Figure 8.
CONNECTING 700 SERIES UNITS INTO AN
EXISTING "M" CIRCUIT SYSTEM
PREPARATION
OF SWITCH PANEL
CONNECTIONS
SERIES 700
TELET ALK
When
installing a700 Series Master Station into an
existing 100M, 200M, or 600M Series system, con-
nect the various voice line terminals of the 700
Series station to the assigned (Home Line) terminals
of each existing "M" circuit unit. The voice line
terminals of the 100M, 200M, or 600M units, which
are assigned to the 700 Series station, are connected
to the green pair (Home Line) terminals of the 700
Series unit. Voice lines from the 700 Series Master
Station to the Speaker Stations require no special
connections. (See Figure 9.)
Units shipped from the factory are wired for "M"
circuit operation. Therefore, no cutting leads or
jumpers is necessary for this type of operation
unless the last Selector key is to be used for an
extra station instead of for the Call-In feature. To
prepare the last Selector switch for another "M"
circuit station cut from it and insulate the single
blue plastic and black wires (buzzer circuit). (see
Figure 8.)
CUT HERE & INSULATE TO REMOVE
BUZZER CIRCUIT
BLUE
WIRE
BLACK
WIRE
\
VOICE LINES
NOTE
Annunciator models are not furnished with
the
Call-In circuit,
ALL "S" CIRCUIT SYSTEMS
CONNECTIONS
Figure 8. Connections to be cut for using
Call-In Key for "M" Circuit
NOTE
Annunciator model Master Stations are not
furnished with the Call-In circuit.
ALL ''M'' CIRCUIT SYSTEMS
CONNECTIONS
Refer to Figure 11 showing the connections between
the four Master Stations. In all ''8'' circuit systems,
Master units are connected in the same manner
regardless of the number of stations used, Arrange
to connect all Master Stations to the first Selector
switches starting with No. 1 and up. The number
of Selector switches to be assigned to the Masters
will be one less than the total number of Masters
in the system.
Connections are the same as those given under the
sections on "Combination 'M' and'S' circuits," (See
Figure I and Figure 1 0.)
Connect voice lines from the "Floater" Station to
other Master stations at terminal No. 1 at Station
No, 1, terminal No" 2 at Station No. 2 and in this
same manner to the other Master Stations.
PREPARATION OF SWITCH PANEL
Units shipped from the factory are wired for "M"
system operation and no cutting of jumpers or leads
is necessary if this type of operation is desired.
The Call-In circuit can be removed and the Call-In
key position be used for an additional "M" circuit
station by cutting and taping the single blue plastic
and black wires (buzzer circuit). (See Figure 8,)
At Station No. 1 connect the terminals to which the
green pair of wires are attached, to the No. 1
terminals of all the other Master Stations. Connect
Station No. 2 green pair terminals to the No.2
terminals at all the other Master Stations. Connect
the remaining Master Stations in the same manner
as shown in Figure 11.
PREPARATION OF THE SWITCH PANEL
NOTE
Annunciator models are not furnished with
the Call-In circuit.
For an all "S" circuit system the common jumpers
between Selector switches should not be cut. The
last Selector switch must be prepared by cutting
and insulating the twisted blue pair of wires, the
8

INSTALLATION
o0
o
212M
ASSIGNED LINE SELECTOR 4-t4+~4++I-H++++-++i+t+tt~"t" ....
KEY - 2
ASSIGNED LINE SELECTOR KEY - I
GREEN PAIR (ASSIGNED
HOME LINE)
GROUND TO WATER PIPE
OR OTHER GOOD GROUND
o
o
712
Figure 9. Connection of a700 Series Unit into an Existing "M" Circuit System
single blue plastic wire and the single black wire
from the switch. (See Figure 3.)
If the units are annunciator models, only the twisted
blue pair of wires should be cut from the switch
since the buzzer circuit is necessary for annunciator
operation. (See Figure 4.) Annunciator models are
not furnished with the standard Call-In feature.
CONNECTING 700 SERIES UNITS INTO
EXISTING
"S" CIRCUIT SYSTEMS
CONNECTIONS
the green pair terminals in the junction box connects
to the home line, therefore, all incoming voice
lines from other stations must be connected to these
terminals rather than to the terminals of an assigned
selector key.
When connecting a700 Series station into a900 Series
system, the various voice line terminals of the 700
Series units are connected to the extra (14th) pair
of terminals of each 900 Series junction box rather
than to the green pair terminals. See bulletin TEL
115, "Installation of Series 900 Teletalk."
PREPARATION OF THE SWITCH PANEL
When installing a700 Series unit into a200S or 500
Series system the connections are the same as those
given under the section "All'S' Circuit System."
It must be remembered that on 700 Series units
The preparation of the switch panel is the same
as that given under the section on "All'S' Circuit
System. "
9

SERIES 700 TELETALK
706 MASTER
5G45 SPEAKERS
STATIONS
NO, I
r":
......
r';::
_GREEN
4•
6·000000p
PAIR
'---
~
I~
I2345
'-
r- :...
'4 •
14
OOOOOOr
.....
,1
'\.
NO,
3'\.. --::.
";-
-
CONNECT TO
.""'-
NO.2
WATER PIPE
OR OTHER
'---
r';::
......
GOOD GROUND
14 .4 00000 0• 0
Molal
~I~
NO.4'\.
L---::::.
14 4o0o0o0 4
'\..--- ""'-
.-I- r-
-=-
,..---
I
!lIloI.l
S'\..NO.
--
~
i"-.
I.
4~
• 0 0 o0o00"-
~
~
44 4 0
000004
r---
,1
r--
'\.--
~
-
7"
"-
-
--"
-
FLOATER
NO.6
Figure 10. Typical "M" and "S" Circuit System or all "M" Circuit System Layout without Call-In Feature
EN PAIR
ROUND TO
ATER PIPE
ROTHER
000 GROUND
r';::
......
4o0 0 0 0 0 0 0 0 4
~ ~ GRE
~ .. ~
I23456
__
.--
f-e4
4
OOOOOOOOOf .l.
'\..
.-
-
STER STATIONS
G
W
""'-
......
0
4-G
•40000000o040
~
1--
4,0 0 o00 0 0o0
1.
'-
-
-;-
-
"-
......
-
-.
40 0 0 0 0 o00o4 0
~ ..
~
4
-'
00000 0 o00
~
l. '\.
---
i"-.
......
:. 0
.4
14
0o0 0 00
004 0
~ ..
1-- ~
~ 0 0 0o00
000 T
.l '\..
-
-=-
706 MA
NO.3
NO.2
NO. I
FLOATER
Figure 11, Typical "S" Circuit System Layout
10

JNSTALLATION
ANNUNCIATOR
AND SWITCHJNG CIRCUIT (-3) CONNECTIONS
Annunciator model
Teletalks are installed in the
same manner as standard units as far as voice lines
are concerned, except that they are not equipped
with
the Call-In key and circuit. When preparing
the switch panel for one of the various type systems,
do not cut the single blue plastic or black wires
(buzzer circuit) from the last switch. (See Figure
4.)
In each terminal box a terminal strip will be found
for connecting annunciator circuits. No. 22 wire
is satisfactory for annunciator lines up to 1,000
feet. Aheavy common wire permits use up to
2,000 feet.
assigned to that station number on the switch panel
of the other annunciator model Teletalk Master
Stations in the system.
Connect the voice lines as shown in the system
layout. (See Figure 10.) The system layout in
Figure 13 shows how annunciator push buttons from
Speaker Stations are connected for operation with
four
Master Annunciator Stations. Connect the an-
nunciators for the Master Stations in the system by
making the connections
first for one station, then
for another, and so on, until the annunciator syst.,m
is completed. The annunciator switches at each
Master Station are connected as follows:
TERMINAL __ --
BOX COVER
VOICE
TERMINALS
ANNUNCIATOR
TERMINALS
ANNUNCIATOR SWITCH
TERMINALS (IF EQUIPPED
WITH 3-POSITION GND.
SELECTOR SWITCHES) TERM.
Master Station 1. (Assigned line number 1.)
Switch 1 - Connect to Annunciator 1of Floater
Station.
Switch 2 - Connect to Annunciator 1of Station 2
Switch 3Connect
to Annunciator 1of Station 3
(Continue
as above until all connections are made
to
switches of Station 1.)
Master Station 2. (Assigned line number 2.)
Switch 1 - Connect to Annunciator 2of Station 1.
Switch 2 - Connect to Annunciator 2of Floater
Station.
Switch 3Connect to Annunciator 2of Station 3
(Continue
as above until all connections are made to
switches of Station 2.)
Floater Station
Switch 1 - Connect to Annunciator 1of Station 1
Switch 2 - Connect to Annunciator 2of Station 2
Switch 3 - Connect
to Annunciator 3of station 3
(Continue
as above until all connections are made to
switches of "Floater Station. ")
Figure 12. Annunciator Terminal Box -
12-Station Unit
If there are more than two or three annunciator
models in the system it is necessary to run the
annunciator and voice lines from each unit to a
centrally located junction box for the interconnection
of all units. The wiring problem is greatly simpli-
fied by this method. If an installation is divided into
groups of units separated by an appreciable distance
it may be advisable to connect each group separately,
each group having its own central junction box with
each central junction box connected by a suitable
cable.
All annunciator model Teletalk Master Stations which
must call each other by the annunciator system
should have three-position selector switches (code
-3). The third position (down) of the Selector switch
is used as apush button to operate the annunciator
Complete connections at other stations in the same
manner.
It is absolutely necessary that a common, or ground
connection for the annunciator and switches be made
by a
wire connecting to the ground in the terminal
boxes.
The common wire of the annunciator (also common
wire of switches of the 3-position selector switches)
may be No. 22 to No. 14 wire in the inter station
cable or if a very low resistance ground circuit is
available this ground circuit may be used. Always
check the resistance of annunciator lines when making
the
installation. If the resistance exceeds 35 ohms,
the annunciator may not operate properly and cor-
rection should be made at the time of installation.
If the resistance is too high, it is necessary either
to parallel another wire with these circuits, if there
are any spare wires in the cable available; or else
heavier wires must be run.
11

SERIES 700 TELETALK
,....
MASTER
~
STATIONS
VOICE
CONNECT TO
TERMINALS
WATER PIPE
"
~ '~-o 0 0 0 0 0 0 0 0 0 0 0 o0
OR OTHER
.1:=1 ~ 2 3 4 5 6 7 8 9 10 II 12
GOOD GROUND
/!!5fJ.. OOOOOOOOOOOr
O
~
\.. ~.....-4' 0 0 0 0 0 0 T. 0 0
,....
• ~.. 0 0 0 0 0 0 0 0 0 0 0 I
~
ANNUNCIATOR
TERMINALS
SWITCH
TERMINALS
I":
~
0
/!!5fJ. ::J]
r.--
.~
\.. .
.->
. ~ ~
o0 0 0 l o0
o.
•I' ,
000000
00o00
4:
~T
r-€
"-
~
0
/!!5fJ:=J
~
'"
....- .->
.... ~ lo0o
000 00
--@
•, , , 0 0o0 0
00000
0
.........
L.
~
r':"
0
/!!5fJ .. r=t
..
~
"• l o0 0 0 0 o0
-
FLOATER
I' , , 00o0
0000000
(O)~
k~
(0) (0]
CO'>
©
•
©
•
~ .....
lW
•
©
•
12
©©©© ©
•• • ••
SPEAKER STATIONS (5G45B)
Figure 13. Typical Teletalk Annunciator Layout

INSTALLATION
SPEAKER STATION CONNECTIONS
5G45 SPEAKER STATION CONNECTIONS
Connections to the speaker are made at screw ter-
minals at the bottom of the cabinet. These terminals
are identified by the word "LINE." (See Figure
14.) (The 5G45 Speaker is not equipped with a Call-
In switch.)
screw terminals on the bottom of the unit. The
Call-In terminals are identified by the words "Call-
In" and the voice line terminals by the word "LINE. "
The
operation and connections of a5E45R Speaker
Station are similar.
5G45B SPEAKER STATION CONNECTIONS
The connections to the 5E45 Speaker Stations are
similar. The 5E45 is a model used for flush mount-
ing. The chassis extends 2-3/8" from the rear of
the face plate requiring a 7" circle or a standard
8" high by 8" wide by 4" deep wall box with 7-1/4"
x 5-1/2" mountings.
5G45R SPEAKER STATION CONNECTIONS
This type Speaker Station is equipped with a Call-In
switch which is connected to the last numbered pair
of voice terminals of the Master Station (designated
as the "Call-In terminals"). Thus, when the Call-In
switch at any remote Speaker Station is pressed, a
buzzer is sounded at the Master Station (the buzzer
tone will also be heard at the Speaker Station). The
individual at the Master will determine the caller
and, after this has been done, the person at the
remote Speaker Station can converse without pressing
the Call-In switch. The Call-In circuit can use the
same wire size as the Speaker voice circuit and it can
be included in the cable. The Call-in switch should be
connected only to one Master Station in the system.
The connections to the Speaker unit are made at
This type Speaker Station is equipped with a push
button switch which is connected to the assigned
annunciator terminal of the Master Station and to
the common ground wire of the system. These
wires should be connected to the screw terminals
on the bottom of the Speaker unit which are identified.
(See Figure 14.) One push button is used to call
one Master unit only. Two or three push buttons
can be provided. On these models the annunciator
circuit wires are connected to a terminal strip
inside the unit.
5G45S and 5G45BS SPEAKER STATION CONNECTIONS
These Speaker Stations are used in Silencing circuit
"-14" systems. They are equipped with reply-back
push buttons which must be held down while talking.
When this switch is not pressed, the Master Station
cannot hear your conversation, thus preventing
eavesdropping. The voice circuit wiring is the
same as for a5G45 or 5G45B Speaker Station. A
connection
from reply-back switch to a common
(ground) wire of the system is necessary. It is
SILENCING CIRCUIT 8< ANNUN.
COMMON GROUND TERMINAL
VOICE
ANNUNCIATOR
TER,INALS TER,INALS
I
b0 000 000
•• 0 0
LINE B~TOM~IEW
I234567 8 9
10
II 12
GROUND
boo 0 0
000 ~
05G45
SPEAKER
.........
1..
'2>
'2>
o0 0 0 ~ 0 0 0 0 o0 0
0
000000000
0
000
LINE ~0
JUNCTION BOX TERMINAL
STRIP OF 712A-14 TELETALK
BOTTOM VIEW
5G~~SP~KER
ANN UN. C
ICOMMON
RETURN
I
LINE Q~I .O_
WIRE OF ANN UN.
LINE l.~ .0,
BO OMVIEW
8< SILENCING
BO TOM VIEW
5G45S SPEAKER
CIRCUIT
5G45BS SPEAKER
'2> 0c
ANNUN.0 0C
LENCING CIRCUIT/ I/
I
51
GROUND TERMINAL
Figure 14. Speaker Station Connection - Annunciator and Silencing Circuit Layout
13

made at a terminal identified by the letter "C" on
the bottom of the unit. (See Figure 14.)
5E45BS Speaker Station connections are similar.
5G45RS SPEAKER STATION CONNECTIONS
This type Speaker Station is equipped with a reply-
SERIES 700 TELETALK
back switch for use in "-14" systems and a Call-
In switch. The reply-back button must be held down
while talking
except when calling in using the Call-
In lever. The Call-In and voice circuit wiring is
the same as for a5G45R Speaker Station. Acon-
nection
from the reply-back switch to the common
(ground)
wire of the system is necessary. It is
made at a special terminal inside the unit.
CIRCillT VARIATIONS AND CONNEGTIONS
SILENCING CIRCillT CONNECTIONS (-14)
A
silencing circuit can be incorporated in any 700
Se"ries
system employing "-14" Master Stations. This
Master Station prevents return speech and eaves-
dropping unless a reply-back button on the "-S"
Speaker Station is pressed. Silencing circuit Master
and Speaker Stations are installed in the same man-
ner as the standard units as far as voice lines and
annunciator circuits are concerned. The only ex-
ception is that the reply-back button of the Speaker
Station should be connected to acommon (ground)
wire in the system. (See Figure 14.)
In systems employing more than one "-14" Master
Station, all Masters should be connected for "S"
circuit operation. It is not recommended that more
than one "M" circuit master be used in a "-14"
system. If more than one Master Station is used,
all units should be the "-14" type.
NOTE
The
busy signal feature cannot be used on
"-14" models.
ALL-CALL CONNECTIONS (-1)
The
Master Stations are installed in a system in
the same manner as standard units. On models
furnished with the Call-In key and circuit, the last
Selector switch is not connected into the All-Call
SWitching circuit. Two extra wires are provided
on the All-Call switch for connection to the voice
pair of the last Selector switch whenever it is con-
nected to an additional Speaker Station. When making
a call, lift the All-Call switch lever clockwise and
talk, using the Talk-Listen lever. The All-Call
lever should be placed in the horizontal position
when a call is completed.
It is recommended that All-Call be connected to
Speaker Stations only.
500-0HM SYSTEM CONNECTIONS (-6)
500-ohm
Master Stations (-6) and Speaker Stations
(5G500)
are installed in a system in the same manner
as the standard units. The Call-In circuits and
14
annunciator circuits of 5G500R and 5G500B Speakers
must not exceed 35 ohms, D. C. resistance. When
500-ohm
Master Stations are used in a system, 500-
ohm
Speakers also must be used.
EARPHONE MODEL CONNECTIONS (C)
These Master Stations are installed in a system in
the same manner as standard units. Earphone
models are designed for use with other "s" circuit
Master Stations only.
HANDSET MODEL CONNECTIONS (T)
AND
BUSY SIGNAL MODEL CONNECTIONS (L)
These Master Stations are installed in the same
manner as standard models. In busy signal systems
it is advisable to use acommon ground wire through-
out the system. For proper busy signal operation,
the Talk-Listen lever must be in the IDLE position
when not conversing. If this is not done, a busy
signal will be given to a calling station. The IDLE
position must be used to determine if another station,
either Speaker or Master, is busy. On Handset
models do not lift the handset off the cradle when
determining if a station is busy; otherwise the pilot
lamp will signal busy.
PAGING CONNECTIONS (-15)
V:oice and
annunciator circuits are connected in the
same manner as standal'd units. In systems where
a "-15" Master Station is employed for paging, the
last Selector switch (key with green dot) connects
the output of the Teletalk with the input of the paging
amplifier. (Second from last key is used for Call-
In on "-15" models.) The Output terminals of the
paging amplifier are connected to speakers which are
not part of the Teletalk system. The last numbered
pair of terminals of the Master Station junction box
is connected to the Input terminals of the paging
amplifier. A special cord and terminal block is
brought out of the Master Station for connections
to the "B" supply cut-off relay of the paging ampli-
fier. The relay switching circuit total line resistance
should be approximately 2 ohms.
Figure 15 shows a700-15 system layout consisting
of one 712L and two 712L-15 Teletalks, a group
of paging speakers, and an 85-25 Paging Amplifier.
This layout shows the Output and the relay terminal
blocks of two 712L-15 Teletalks connected to one

INSTA LLA TION
GREEN PAIR
712L
",e
\...
"'-
'\
4• 0 000000000
I23 4 56789
10 II 12
~.
T000 0 0 0 0 0 0 0l
I .....
,-
-
712L-15 ",8
'"
Il • 0 00 0 00000440
~ ..
4, 0 000 0 0000I
"-
--
G"c
~
--
~~
"712L-15
........ -
"-
40 0 0 0 0 0 0 0 o4
..
0
".
~:.'~
4~ 40 0 0 00 0 00o ••
4~
l
'\.
....-
-
~
-
~
.- IF 5GP-I, 8CP-1 AND 10BP-1 -
FLOATER
HIGH IMPEDANCE SPEAKERS
GROUND TO
.=
IARE
USED, CONNECT THESE
WATER PIPE
l...-
TO 250.n. TERMINALS OR OTHER GOOD
----4
GROUND
I
BOOSTER
C
~
041@
RELAY -Ql PQ
00 INPUT
/
5\0.n.
I 2 3 I 2 3
() 0 ( 250.n.
(1\ 90
""'<,;J"
85-25
~
25 WATT AMPL.
1
-.L --1I
JT
~
I"
........
I"
~
.~.
~)
~fJ~
... ~
r
[1'
~ ~
\\ "~;:_ J}
~~~
~gi'
'IIW.l~
fIWol,
\~
"
-~
'\.
""'""
-
8C4!>-2 MIL 45 10845 5G45 5G45
Figure 15. 700-15 System Layout
15

SERIES 700 TELETALK
I BOOSTER
C, I0 02 (4 (0\
RELAY 080 0 I.!2Y IN~T
(9 6 ~ 25~n ~n (~ 9
I -
8~25
25 WATT AMPL.
712-18
" ~
,
E:il ~ ·,·•••·•·••0 0 GROUND TO WATER
~. 1- I23 4 5 6 7 8 9 10 II 12 PIPE OR OTHER GOOD
o:..-w •I4 II Il II II t0 .- ..... ...., GROUND
" ..- :.-...-- "'H-++""~-++*,I+l~~~""-'" J...
.5G45R
...... .....
5G45 • 1":----."
}- __ ....J
\. ...........
--
>-CALL-IN
LINE ~",--'''''''
Q
'\.
Ltt====V~"-1 -
•5G45
.5G45R
f'...--",,_1f'I
•5G45
'\.. ..... ...;;
'1
.5G45
5G45
•
o
8C45-2 •
HS-45
10845
MIL-45
Figure 16. 700-18 System Layout
16

INSTALLATION
paging amplifier. When this is done, both Master
Stations must call the same group of Speakers. By
using busy light (L) model Master Stations, a busy
indication will be given if another Master Station
is making an All-Call.
ALL-CALL CONNECTIONS (-18)
The voice lines and annunicator circuits are con-
nected in the same manner as for standard models.
In systems where a "-18" Master Station is employed
for paging, a special All-Call switch is used to con-
nect the Output of the Teletalk to the Input of the
paging amplifier and transfer the paging amplifier
output to the Speaker Stations in the Teletalk system.
Three cords and numbered terminal blocks are
brought out of the Master Station for voice line and
relay connections. (See Figure 16.)
The wire size used for relay switching circuit con-
nections should be such that line D. C. resistance
between Master Station and paging amplifier is as
low as possible, approximately 2 ohms. If booster
paging amplifiers are used in conjunction with the
paging amplifier, the relay circuit line resistance
between the booster and the paging amplifier should
not
exceed one ohm.
It is possible to connect more than one "-18" Teletalk
to one paging amplifier in a system. When this is
done, it is necessary that the paging amplifier Output
wires to the Master No. 3 terminal blockbe polarized
to prevent shorting the Speaker Stations if one calling
station breaks in on another. Care should be
taken so that one Master Station does not interrupt
another when calling.
On models furnished with the Call-In key and circuit,
the last Selector switch is not connected into the
All-Call page switching circuit. Two extra wires
are provided on the All-Call switch for connection
to the voice pair of this last Selector switch when-
ever it is connected to an additional Speaker Station.
To page, lift the paging lever clockwise and talk
using the Talk-Listen lever. When finished, the
paging lever should be placed in the horizontal
position. Master Stations in a system should not be
connected to the paging circuit of a "-18" Master
Station and wires from the All-Call paging switch
to Selector keys assigned Master Stations should be
cut and insulated.
OPERATING INSTRUCTIONS
OPERATION "s" CIRCUIT
IDLE POSITION. Keep
your Teletalk in IDLE posi-
tion when not conversing. Turn ON-OFF switch
on. The pilot lamp will glow to indicate your Tel-
etalk is turned on.
Lift Talk-Listen lever to IDLE position (up) and
be
sure all Selector keys are in normal position
(down).
On Busy Signal
Models, the Talk-Listen lever must
be in the IDLE position to determine if the station
called is busy.
When the Talk-Listen lever is in the LISTEN or
TALK position, a busy indication will be given to
any calling Master Station.
TO CALL ASTATION. With the Talk-Listen lever
in IDLE, flip up Selector key for the desired station.
On a Busy Signal Model, if the pilot lamp goes out,
the station called is busy.
TO CALL BY ANNUNCIATOR. Signal the station
to be called by pushing the station Selector key
momentarily to the down position. When the station
answers, push the Selector key up and converse
using the Talk-Listen lever.
TO CALL BY VOICE. Hold Talk-Listen lever in
TALK
position (down) and call the person desired;
then announce your name or station. Return the
lever to LISTEN position (center) while waiting for
reply. When a reply is received, converse nor-
mally, depressing the lever to TALK and releasing
it to LISTEN.
On all calls, adjust volume to the desired level.
The ON-OFF switch knob controls volume for both
talking and listening. When the call is completed,
restore Selector key and return Talk-Listen lever
to IDLE position (up).
TO ANSWER ABUZZER CALL-IN. When the buzzer
sounds, indicating that a Speaker Station is calling,
flip up the "Call-In key" (last Selector key). Using
the Talk- Listen lever, determine which station is
calling; then return the Call-In key to normal and
flip up the caller's Selector key. Converse using
the Talk-Listen lever.
TO ANSWER AN ANNUNCIATOR CALL. When a
station calls by annunciator. the buzzer will sound
and the Annunciator Plunger above the calling station ts
Selector key will be ejected.
To answer the call, flip up that station's Selector
key and converse using the Talk-Listen lever just
as you do when originating a call. The plunger can
be restored as you trip the Selector key of the
calling station.
17

TO ANSWER AVOICE CALL. To answer a voice
call from another Master Station, flipup that station's
Selector key and converse using the Talk-Listen
lever just as you do when originating a call.
After all calls, return Selector key to normal and
the Talk-Listen lever to IDLE position.
TO MAKE AGROUP CALL. To call several stations
simultaneously, trip up the Selector key for each
station and make the call in the same way as though
it were one station.
CONFERENCE CALLS. To originate a conference
call with other Master Stations, call each of the
stations indiVidually and receive acknowledgement
from each. When you call the last indiVidual, ask
him to trip up the Selector key of the other stations
in the conference. All stations are then connected
in one circuit.
EARPHONE. Used for conversing with "S" circuit
Masters only. Operate the Talk-Listen lever the
same as when earphone is not used.
HANDSET. When conversing with a Master Station,
SERIES 700 TELETALK
leave the Talk-Listen lever in IDLE and converse
without further manual operation. When conversing
with a "M" circuit Station, the Talk-Listen lever
must be operated the same as when Handset is not
used.
On Handset - Busy Signal Models, the Handset should
remain on the cradle until a station is selected, since
the pilot lamp goes out when the Handset is used
in the IDLE position.
OPERATION "M" CIRCUIT
The operations and the Busy Light function of a
Master Station when used in a "M" circuit system
is the same as given under "S" circuit operation
with the follOWing exceptions:
To receive a call from another Master Station,
the Talk-Listen lever should remain in the IDLE
position. To answer, just reply toward the Speaker-
Microphone. The Handset can be used only by the
station originating a call, and the Talk-Listen lever
must be operated from LISTEN to TALK when con-
versing. Earphone models cannot be used in an
"M" circuit system.
HUM AND NOISE TROUBLES
Hum,
noise, or other interference may be produced
by medical apparatus, office equipment, motors, or
poor wave form of the power supply. It may be
picked
up by the voice lines running from the Speaker
Stations and amplified in the master unit when the
Talk-Listen switch is in the LISTEN position. De-
fective tubes may also prove a source of hum and
noise in the amplifier.
Interstation voice lines must always be twisted
,pair wires, for minimum pickup of interference.
The transposing effect obtained from the twisted
wires effectively cancels out hum or noise picked
up by interstation wiring. Care should be taken
that the cable does not ground to any pipe, condUit,
or other metal surface or by moisture due to leak-
age, as this will unbalance the cancelling effect of
the twisted wire and may cause noise, hum, or cross
talk in the Teletalk. In extremely noisy locations
where the noise is picked up by the interstation
wiring, it may be necessary to install shielded pairs
of wire between the Speaker Station and the Master
Station. Never use a single shielded wire for this
purpose, using the shield for one wire, but use two-
wire shielded cable, grounding the shield at one
point
near the center of the length of cable or near
the Teletalk Master Station.
The source of interference caused by office equip-
ment, such as electric typewriters or other equip-
ment using automatic speed regulators, may cause a
clicking noise in the Teletalk. Such interference,
however, is usually easy to trace since it will occur
only when the interfering equipment is in operation.
Filters for eliminating the interference caused by
these devices are usually available from the manu-
facturer of the equipment causing such interference.
It might be necessary to reverse the power plug to
determine the correct polarity for lowest hum level.
The chassis connection in the junction box should
always be grounded to a water pipe or other good
ground. This will aid in the elimination of hum and
noise.
If the hum or noise cannot be eliminated, refer the
unit to an authorized maintenance man for trouble
shooting.
INSERT NAMES IN NAME STRIP
Type or write names assigned to each Selector key
in spaces on manila name strip. Cut strip from
card and sandwich it between the transparent covers.
Insert sandwiched name strip into name strip holder
and push on Teletalk panel. When removing name
strip holder, care should be taken not to scratch
panel.
18

NOTE: (A-3)
~
BLACK
GREEN PAIR
PURPLE
AND WHITE
YELLOW
AND WHITE
PINK
AND WHITE
dARK SLATE
AND WHITE
LIGHT SLATE
AND WHITE
OK BROWN
AND WHITE
LT BROWN
AND WHITE
OK GREEN
AND WHITE
LT GREEN
AND WHITE
ORANGE
AND WHITE
OK BLUE
AND WHITE
LT BLUE
AND WHITE
COLOR CODE AND CONNECTIONS FOR SIX
STATION TELETALKS HAVING ANNUN-
CIATORS AND THREE POSITION SWITCHES
SHOWN. COLORED WIRES, DARK BROWN
THRU PURPLE, FOR ANNUNCIATOR CON-
NECTIONS AND WHITE MATES FOR THIRD
POSITION SWITCH CONNECTIONS.
~-- SEE NOTES
NOTE: (-A)
FOR MODELS WITH ANNUNCIATORS
ONLY, COLORED WIRES, DARK BROWN
THRU PURPLE, FOR ANNUNCIATOR CON-
NECTIONS. (WHITE MATES NOT USED)
~._--- VOICE CIRCUITS
NOTE: (-3)
FOR MODELS WITH THREE POSITION
SWITCHES ONLY, COLORED WIRES,
DARK BROWN THRU PURPLE, FOR
THIRD POSITION SWITCH CONNECT-
IONS. (WHITE MATES NOT USED)
JUNCTION BOX CONNECTIONS 706A-3, 706A AND 706-3 MODELS

,I
WEBSTER
"Where quality is a responsibility and fair dealing an obligation"
211·15686 654A3.5
ELECTRIC
RACINE, WISCONSIN
Established 1909
LITHO IN U.S.A.