Bell 2568hp Guide

BELL

SYSTEM

PRACTICES

Plant

Series

SECTION

529-225-134

Issue

2, August 1968

AT&TCo

Special

TELEPHONE

SETS

-2568HP

/HU

IDENTIFICATION, INSTALLATION, CONNECTIONS,

AND

MAINTENANCE

• END-TO-END SIGNALING

• EXCLUS

IO

N

• SPEAKERPHONE

(OPTIONAL}

Fig. 1 -2568HP (MDI and 2568HU Telephone

Set

1.

GENERAL

1.01

The

2568-type telephone

set

(Fig. 1) is

intended

solely

for

use

with

specially en-

gineered lines -

not

for general telephone use.

1.02

This

section is reissued

to:

•

Add

425K

network

(2568HU)

•

Include

connections

formerly

found

in

Section 529-225-468

• Revise Tables

• Revise

set

connection figures

Since

this

reissue covers a

general

revision,

ar-

rows

ordinarily

used to

indicate

changes have

been omitted.

2. IDENTIFICATION

ORDERING GUIDE

Set, Telephone, 2568HP

-*

(MD)

Set, Telephone, 2568HU-*

(a)

Replaceable Common Components

• Cord,

Mounting

D50N-*

• Key, 636D

• Lamp, 51A

• P-12A858 Blocking Ring (Shipped loose)

• P-21F159 Switch Assembly (Line)

• P-25E118 Switch Assembly (Exclusion)

• P-25E120

Button

and

Collar

Assembly

• P-25E785

Card

Retainer

• P-86D7*

Faceplate

• P-90D052

Guard

Assembly

• Set,

Hand,

G3Y-*

(b)

Replaceable Components [2568HP

(MD)

only]

• Dial, 35C3B

• P-25E963

Relay

Assembly (4-wire)

• P-88B9*

Housing

Assembly

• Ringer,

HlA

(c)

Replaceable Components (2568HU

only)

• Dial, 35C3A

• P-88E5*

Housing

Assembly

• P-90D062

Printed

Wiring

Board

Assembly

(4-wire

relay)

• P-90D064

Bracket,

Arm,

and

Component

Assembly (includes

NlA

Ringer)

*

Add

appropriate

color suffix

from

Table A.

©American Telephone and Telegraph Company, 1968

Printed in U.S.A. Page 1

l

il

SECTION

529-225-134

(d)

Replaceable Optional Components

• Buzzer, KS-8109L2

TABLE

A

TELEPHONE

SET

AND

FACEPLATE COLOR GUIDE

TELEPHONE

SET*

FACEPLATE

ST

ANDA

RD

COLOR

SUFFIX

COORDINATED

COLOR

SUFFI

X

Black

-03 Charcoal -70

Green -51 Lt. Green

-71

Red

-53

Muted

Red -69

Yellow -56 Lt. Yellow -72

White

-58 Lt.

Gray

-73

Rose

Pink

-59

Muted

Pink

-74

Lt. Beige -60

Muted

Beige -75

Lt.

Gray

-61

Charcoal

-70

Aqua

Blue -62

Muted

Blue

-76

Turquoise

-64 Muted

Turquois

e -77

*

Refer

to

Section 500-120-100

for

promoted

colors.

DESIGN

FEATURES

•

2-

and

4-wire

operation

• 5-line pickup

(illuminated

key

buttons)

•

Hold

on

all

lines (key

button

arrang

ed

for

but

not

equipped

with

51A

lamp

for

illumination)

•

Three

pickup keys convertible

for

signal

-

ing

• Common

ringer

•

Extension

exclusion

•

End-to-end

signaling

•

Six

transfer

switch

hook

• AC

or

DC

operated

buzzer

(optional)

• Speakerphone (optional)

APPLICATION

•

Central

Office,

PBX,

and

private

or

inter

-

communicating

2-

and

4-wire lines

•

lAl,

1A2,

and

6A key telephone

system

line

circuits

Page 2

P-9ODO52

P-25E

118

GUARD

ASSY

SWITCH ASSY

(EXCLUSION)

BUZZER

MOUNTING

BRACKET

""

Fig. 2 -

2568HP

!MDI

Telephone Set, Housing

Removed

OPERATING

FEATURES

(a) Exclusion

Switch:

operated

by

left

line

switch

plunger

(pull up

to

operate

exclu-

sion; depress to

restore)

.

(b) Ringer Volume Control: provides

manual

control

of

ringer

volume [accessible

from

bottom

of

2568HP (MD) set,

left

side

of

2568HU

set].

OPTIONAL

FEATURES

(a)

Buzzer:

a KS-8109L2

or

equivalent

buzzer

may

be

mounted

on

the

bracket

provided

(Fig. 2

and

3).

3. INSTALLATION

(a)

Planning

• Consider

safety

for

yourself,

customer,

and

maintenance

personnel

• Location -desk, table, console, etc.

• Space

requirements

• Distance between associated

apparatus

and

equipment

•

User

convenience

• General

appearance

of

installation

P-900052

GUARD

ASSY

VO

LUME

CONTROL

Fig.

3 -2568HU Telephone

Set,

Housing Removed

(b)

Installing

•

Install

sets

in

accordance

with

standard

installation

procedures.

• Use electricians scissors

or

diagonal cut-

ting

pliers

to

remove

insulators

from

stored

spade-tipped leads (to avoid

strip-

ping

tips

or

damaging

conductors) when

optional connections

are

made.

•

Install

the

KS-8109L2 buzzer (ordered sep-

arately)

on

mounting

bracket

using

hard-

ware

provided. Make

sure

buzzer

is in-

sulated

from

metal

base

of

set.

ISS

2,

SECTION

529-225-134

4. CONNECTION INDEX

D

No changes in wiring other than those

specified in this section shall be made.

Tabl

e B - Pickup-Signal Key Conversion

Table

C-

Exclusion Conversion

Table

D - Speakerphone Connections

Table E -

Conductor

Assignments

Using

66E-Type Connecting Block

or

A25B Connector Cable

Table F - 2568HU Telephone

Set

Ringer

or

Buzzer

Connections

Table

G-

2568HP (MD) Telephone

Set

Ringer

or

Buzzer

Connections

Fig. 4 - 2568HU Telephone Set, Connections

Fig.

5-2568HP

(MD) Telephone Set, Con-

nections

Fig. 6 -

Buzzer

Connections

Ref

er

to SD-69487-01

for

connections to speak-

erphone

system

5. MAINTENANCE

(a) These

sets

are

maintained

in

accordance

with

standard

procedures

for

TOUCH-

TONE® key telephone sets.

(b) See

appropriate

sections

for

maintenance

of

individual components such as

handsets,

ringers,

and

dials.

Page 3

_)

SECTION

529-225-134

PLUG

LEAD

D50N

MTG

TER M STRIP

DES

IG.

CORD

ON

6360

KEY

7

\(J

[

RR

(0-Y)

6

4 WIRE

~:

(

RT

(Y-0)

5~

CIR

CU

IT

'

FW

(Y-B

L)

1

:::'.

4 1 ,

~

SIG

GROUND

19~(-

..;-;--G_O_R_SG_

....,..

_~(B_R_-_Y:...

) - -

------<40

46

, ET

ORT

(V-BL)

ET,-,.

(V-BL)

i+

(W-BL)

f1

-------'-"--=-+----'

I

ER

ORR

(BL-V)

ER

,-,.

(BL-V)

'-...

211,--

(

---+.-.o;,;;....

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I

EXCLUSI

ON

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IT

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__

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(W-0)

47

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--'-A'--

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(,.__

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--+.i+----

E_H~,

,.,_()--,.

/

--'-+i+---+

-+---+~(~V_-~O~)--o-~!'-{

(V)

(BR)

(Y)

(S)

EXCLUS I

ON

SW

ITCH

ASSEMBLY

I

B;:/

(0-W)

I

.---v;-----t-t------t---'-~----,

1 :

(Y)

B

(0-V)

EB:::-.

(0-V)

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22

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KEY

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23

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(0:...-....;B;_K;.;..)

-+----1-,---..J---<>-t

9_

SPEAKER

IT

(V-BR)

PHONE

49

...

(--------------*

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(Y)

CI

RCUI T

24

(

IR

(BR-

V)

*

48

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Tl

(V-G)

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32

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:

SIG CIR

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____

*

33

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(R

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4T

:::_

SIG CI

RCUIT

II

~(-------=B'--_...,.;...-(_B_L_-B_K_)--'..,..-*

f A,H

OR

S

(BK-BL)

4H_

36~~-¥,,;......:..c..:....:::.:..:....:::.._+,,,;...-.:::.;c.....:..::..:........,,,,;-.-----{,1)-1--~-----,

(S-R)'::'...-.,

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[

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(G-BK)

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SIG CIRCU

IT

14

(--(

____

B

__

...,.;...-(:..c

B....;R_-.c.B

__

K:...)

---*

20 I +I

39

A,H

ORS

(BK-BR)

SH

-

.___

___

_.

I

HOLD KEY

(H)

1ST

LINE

PICK-UP

KEY

(P)

2ND

LINE

PICK-UP

KEY

(P)

(R)

3RD

LINE

PICK-UP

OR

SIGNAL

KEY

(CONVERTIBLE

(pS)

4TH

LINE

PICK-UP

OR

SIGNAL

KEY

(CONVERTIBLE)

(PS)

5

TH

LINE

PICK-UP

OR

SIGNAL KEY

(CONVERTIBLE)

(pS)

SPARE

16

~(-,;;;;a,------

(_B_L

_-_Y.;..)

----*

•

COMMON

OR

[ , R

OR

RI

(

S-Y)

RR

,.,_

(R)

PRIVATE

LINE

20

~,--------~~--;;;;;----

3

-1.::::_/J.--1------------------------

(--'G-'-)

--+-

RINGER

OR

B

ORB

I (Y )

RT

::'

(BK)

BUZZER

45

~(-;,;,;;,;.-

-----i--'----"-S-'-----;.,,,,._

___

-<,'//-

•------------

--------------

Cl RCUIT

~

Fig. 4 - 2568HU Telephone

Set,

Connections

(Sheet

1 of 2)

Page4

TO

SH

2

FROM

SH

I

/

(V)

(BR)

(Y)

(S)

(Y)

(BR)

(R)

LINE

SWI TCH

PMB6

I

..

(R)

tEM2

•

EM5r

(W) t

(G)

EM3

t

(S)

t

I

EBEM4

t

• PMBI

ISS

2,

SECTION

529-225-134

TB

2

(W-S)

(Y-S)

;-,.

~

(W-BR)

I 2 5 8

00

(0-BK)

'.!./

'-'

(BK)

(W-G)

6

,-,.

(BL)

r

(0)

,,.,.7

~

(V)

(

S)

(V)

-,

I

MA4

c:::::::J

RELAY

(S-R)

9

/

G3Y

HANDSET

R

CVR

(W) =Q

10

.)

I

u I

I

(W) I

I

(R)

,-,. I

(0-BK)

l

p.TR

(BK)1'

'-'

(R-Gl

,,,

-

-rr1-n1-

±

'---+-------;;

f.f.-

-++++---------

------;;;;;;--

t-1----'---'-----'

(BR)

~

GUARD ASSEMBLY (BK) PRINTED

WIRING

BOARD ASSEMBLY

..

,-,.

V,

s

:b<

T

0

V

(S)

~LI

425K

OR

425G

(G)

NETWORK

(R)

\-,.T

(SEE

NOTE)

(G)

'-'

RR

(W)

c-:

...

(0-BK)

~

(G-W)

(V)

(G)

~---

4-('-W_-..:.

B..:;L_;_

)

-I-----<'/\"

S

NIA

RINGER

35C3A

.

DIAL

J V

(BL)

, 1

(W)

~N

I

s

(R-G)

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~

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L2

0 G 0 F

Cl

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V

N

Cl

I

0 J

g )

(S-R)

*

1

(S)

-*

Cl

0

~

w

V

Te

p q

u

...

~

---------<>k

_j=J

=J

)I -)I

LLLL

4l l ~::Ll

__

_l

___

1

~

NOTE:

CURRENT

PRODU

CTION SETS ARE EQUIPPED WITH

425

K NETWORK

EARL

Y PRODUCTI

ON

EQUIPPED WITH

425G

NETWORK

ARE

WIRED

AS

FOLLOWS:

A.

(W-BL)

DIAL

AND

(S-R)

PRINTED WIRING BOARD LEADS ARE

CONN

ECTED

TO

TB2-8

.

B.

(R)

DIAL

AND

(G)

LINE

SW

ITCH LEADS

ARE

CONNECTED

TO

TERM

. F

OF

NETWORK.

*

INSULATED

AND

STORED .

t TERMI

NAL

ON

NETWORK.

6 :

31

9 :

111111

34

:

::::::::::

~~

~

~;

~

18

~

43

~

Fig. 4 - 2568HU Telephone

Set,

Connections

(Sheet

2 of 2)

PART

OF

TERMINAL

D50

N

STRIP

ON

MTG

CORD

636D

KEY

(G-W)

~~~

(W-G)

(BL-

R)

~:>

(R-BL)

(BR-R)

~~>

(R-BR

(0-BK)

~:>

(BK-0)

(S-BK)

~~>

(BK

-S

)

(G-Y)

LH 0

(Y-G)

LG

0

Page 5

_)

SECTION

529-225-134

PLUG LEAD

DESIG.

TERM STRIP

D5

0N

MTG

ON

6360

KEY

CORD

?Z

(O-

W)

(V)

[

RR

(0-Y)

,.-,.6

4 WIRE

~:;

RT

(Y-0)

5:'.:'.'

CIRCUIT

'

FW

(Y-BL)

I~

(0-Y)

(Y-0)

41 ,

-c_,,-

(Y-BL)

SIG

GROUN.D

19

+(-

-+,,,---:G

:.....::.O;.;.R....:S:..:G;.._

....,.,-

(:..:Bc..:R_

-..:.Y'-)

-~;--------'-<4

0

46

~

ff

ETORT

(V-BL)

ET~

EXCLUSION

CIRCUIT

LEGEND:

*

IN

SULATED

AND

STORED

t TERMINAL

ON

NETWORK

(V-BL)

(W-BL)

T:

21

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i

"<./

(BL-W)

TV

(W-0)

EXCLUSION

SWITCH

ASSEMBLY

/ A

(V-

0)

EH,..,_

/

(V-0)

•

47f-

,•.

&--

-----

f½'--'

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6360

KEY

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9_

HOLD KEY

(H)

(R)

SPEAKER

IT

(V-BR)

PHONE

49

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(R)

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---------

CI

RCUIT

24

( IR (

BR-V)

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48

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(Y-BR)

t

25

( LK

(S

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[

2

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2

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iiiii-

ili

__::(R.:..-....:o:.:.i

__

rn

~1

___

~3T~~;,,,.-+-++-----+-----++---.1t,,

LINE

30R

3'

SIG CIRC

UIT

8

~(-.;;,;;,;;---B

_____

('-G_-_R-'-)

____

* 1

:}'f

A,HORS

(

R-G)

3H _ •

33f(-

-i+ii-

:.:.;..;.-"-"C..:::..--f

E--"-'--':..:_-

++,---

-'---<.a-+-

~;-

---------++--~

[

, R

(S-R)

4R=

LINE40R

~~~

T

(R-S)

4T::_

SIG Cl

RC

UIT I I

f'-

+if'.--=---

8-

---+.i'

•.-

-(:.:..::BL_

-.:;__;BK);.._~r-- *

A u

,-,o

S

/cv_BL)

4H_

36~(-

++

i--'-~'"..:.=-cv"-=----,,

,,,,_-

-'---'u"_.

-'-'-----,,;E.------{,,,..-+....;:;,,,,.-----,

(S-R):.,._

xL

ti

'-----+--,I-----'

I

\~

___

(B_R_-_B_K..,l

t

t V

[

, R

(G-BK)

5R,..,_

13

' T

(BK-G)

5T:::::

LI

NE 5

OR

38

f---4

4--

-----

-'!!+i-

:..:C:.--:.:.._

---flii+-----:..!.{_;:i.--44--:-(

G-,-),----ii--------,

SIG CIRCUIT 14

~(-

-

;---

8

---

•.

,,;;;--('-

B_R_-_B

_K-'-)-+--*

20 • I

39

( A,H

ORS

(BK-BR)

5H_

'------'

1

SPARE 1

6~(-

Ei,

'------+

+-

-(:.::B.:;L_-...;Y..:.l~

,....---

* +

1ST

LINE

PICK-UP

KEY

(Pl

2ND

LINE

PICK-UP

KEY

(Pl

3RD

LINE

PICK-UP

OR

SIGNAL

KEY

(CONVERTIBLE

(PS)

4TH

LINE

PICK-UP

OR

SIGNAL

KEY

(CONVERTIBLE)

(pS)

5TH

LINE

PI

CK-UP

OR

SIGNAL KEY

(CONVERTI

BLE)

(pS)

(G)

-

PR

IV

ATE

LI

NE 2

0~--;,,

,,,,.--'-'-

-"-'--'-'--

-+i,;,---

.:.=....-'-'-

-+'-+-------{,l}-

-+

.....;;;;,._

____________________

(:.:.G~)--1-

3

,;.-

COM

MON

OR

[ R

OR

RI

(S-Y)

RR,...,.

(R)

RINGER

OR

B

OR

81

(Y-S)

RT;:;: (BK)

BUZZER

45-

(

-,;,,---

---

-;;;;:.;---

~~-

-------{,~'>--......,

_____________

__

_________

_

Cl

RCUIT

Fig. 5 -2568HP (MD) Telephone Set1 Connections (Sheet 1 of 2)

Page 6

TO

SH

2

FROM

SH

/

(O-W)

(V )

(O-Y)

(Y-0)

(Y-BL)

(R)

(W)

(G)

SW

I

TCH

ASSEMBLY

(

W-S)

155

2,

SECT

I

ON

529-225-

1

34

TERMINAL STRIP

ASSEMBLY G3Y

HANDSET

!

12

RCVR

PMB6--T---+,,i,--~(Y~--S~)----<2Vr---ll-----

+%

---'

(W

-'-)--<7)/-

-(

1'

(

W-BR)

10

(S)

~

_f

(0-BK)

~/

(W)

EM5

......r -

--±+-

...:..::...-=::..___---<~'J---I

-I

--+-

#if

_;_---'----0_,

1'

(BK)

I

(W-G)

14

(R)

~

j

(BL)

r i i r

! 15 ,

1'

ITRMTR

!

EBEM4._..

T---

.•.

;,;-

~(0_:_)

__

--(2:0--~-+----+-+%-(B_K_)~"-'/r~

(Y)

1'

(V)

(W-BL)

~ 16 (G)

-

-+----'-----+-+--+-+-+-

--ii&.o-

-+-+-t----

----.

•

PMB

I

---o-

-;;;;,----,

(BR)

mi

:

(R)

GUARD

ASSEMBLY

;-

s

·b<'

(G-W)

(G)

HIA

RINGER

(R)

......-

q

~

)

(i)

"'

Cj

0

(BK)

(S-R)

,,

~Kt

(S)

L-

--

•..,.,.._

-H-+---

-----------

~

--!--+-(-Y_-_,051,,,;

' _ - -

::

~~

-

-t

(0-Y)

5

(BK)

-T

0

V

It

··•·•····

35C3B

DIAL

s

~

j_

LJ-..Nv--

V

w

I U

k

)I-

r)I

n

>--re

vv

p

q

(R)

FW

RELAY

(S)

2Lt

425G

(G) NETWORK

(R)

h F

(G)

"-'

RR

(W) (~

..

(0-BK)

,,

..

R

(V)

~

LJ

(~

~k

,~

·~

(BL

) r fl_

J

(W)

GN

~

(R-G)

(0)

~--+

--

----<-Q:/l

L2

0 G

..

PL

UG

PART

OF

TERM INAL,

050

N

STRIP

ON

MTG

CORD

636D

KEY

(G-W)

lf

~~~

(W-G)

(BL-R)

~:~

(R

-BL)

2:

~:-----'-------,

3~

~:------'--;;;-.;;---

(BR-R)

~

:~

(R

-

BR

3:

...

:___.

___

____

;...-_

(0-BK)

(

BK-0)

LLLL

~:~

(S-BK)

~:

>

~~

~~------'----'---'-

~:

~~------'--.c;,;;;'---

(BK-S)

(G-Y)

LH 0

18

~<-

;;;;....

-'----'-

-~

-

(Y-G)

LG

0

43

...

<-

-

----

- ~ -

Fig. 5 - 2568HP (MD} Telephone

Set

, Connections (Sheet 2 of

2)

Page 7

SECTION

529-225-134

TABLE

B

PICKUP-SIGNAL

KEY

CONVERSION*

KEY

LEADS

CONVERTIBLE-KEY OPTIONS

BR

S-R

HPPPPP

M M

HPPPPS

M M

HPPPSS

M 4

HPPSSS

X 4

BR-BK

X

4

X

*

All

convertible key positions

are

arranged

in

the

shop

as pickup positions. To

convert

a key

position

from

pickup (locking) to

signal

(non-

locking), remove

the

P-12A892 screw detail

and

make

necessary

connection changes. To

convert

a key position

from

nonlocking

to

lock-

ing, reverse above procedure.

When

using

con-

vertible keys

for

signaling, use S

lead

of

key

involved

for

signal

circuit

and

G

lead

for

com-

mon

signa

l

ground.

TABLE

C

EXCLUSION CONVERSION

EXCLUSION EXCLUSION

KEY

LEADS

OPTION

BL-W W-BL

W-O

Line 1 (2-wire) *

lR

1T

1H

Line 2 (2-wire) 2R 2T

2H

Line 3 (2-wire) 3R

3T

3H

Line 4 (2-wire) 4R 4T 4H

Line 5 (2-wire) 5R

5T

5H

4-wiret

:j:

:j: :j:

*

Set

is shop wired to provide exclusion

for

2-

wire

service on line 1.

t Connect

ET(V-BL)

and

ER(BL-V)

from

set

to

external

pickup

relay

associated

with

con-

trol

station.

:j:

Individually

insulate

and

store.

Page

8

TABLE

D

SPEAKERPHONE CONNECTIONS

MOUNTING

CORD LEAD

COLOR DESIG

G-V

Rl

V-G

Tl

BR-V

IR

V-BR

IT

S-V

LK

V-S AG

*

Insulated

and

stored.

TO

FIG. 4

OR

5

MTG

CORD

LEADS

R-RI

8-81

R-RI

TERM

STRIP

ON

6360

KEY

RR

RT

RR

CONNECT TO

TEL

SET

TERMINAL

9

T

(Polarity

Guard)

7

*

Ll

(ON

Network)

N

KS-8100

TYPE

BUZZER

CONNECTION

TO

FRAME

OF

BUZZER

(DC

OPERATION)

(AC OPERATION)

Fig. 6 -Buzzer Connections

ISS

2,

SECTION

529-225-134

TABLE

E

CONDUCTOR ASSIGNMENTS USING 66E-TYPE CONNECTING BLOCK

OR

A25B CONNECTOR

CABLE

MOUNTING

CORD

A25B

CONNECTOR

CABLE

66E-TYPE

CONNECTING BLOCK

LEAD

DESIG CORD

TEL

SET

PIN CONNECTOR CONDUCTOR PIN

CLIP

BLOCK

CONDUCTOR TERMINAL

NO.

CABLE

COLOR

NO.

TERMINAL

NO

.

PAIR

NO.

T W

-BL

lT

26

W-BL

26

1

R

BL-W

lR

1 1

BL-W

1 2

A W-O

lH

27

W-O

27

3

Al O-W 1B 2 2 O-W 2 4

LG

W-G

LG

28

W-G

28

5

Ll

G-W

Ll

3 3 G-W 3 6 1

T W-

BR

2T

29

W-BR

29

7

R

BR-W

2R

4 4

BR

-W 4 8

A W-S

2H

30 W-S 30 9

B S-W * 5 5 S-W

.5

10

LG

R-BL

LG

31

R-BL

31

11

L2

BL-R

L2 6 6

BL-R

6

12

T R-O

3T

32 R-O 32

13

R

O-R

3R

7 7

O-R

7 14

A,

H,

or S

R-G

3H

33

R-G

33

15

2

B

G-R

• 8 8 G

-R

8

16

LG

R-BR

LG

34

R-BR

34

17

L3

BR-R

L3

9 9

BR-R

9

18

T R-S

4T

35 R-S 35

19

R

S-R

4R

10 10

S-R

10

20

A,

H, or S

BK-BL

4H

36

BK

-

BL

36

21

B

BL-BK

•

11

BL-BK

11

22

LG

BK-O

LG

37 BK-O

:~7

23

L4

O-BK

L4 12

12

O-B

I(

12

24

T

BK-G

5T

38

BK-G

38

25

3

R G-

BK

5R

13

G

-BK

13

26

A,

H,

or S

BK-BR

5H

39

BK-BR

39

27

B

BR-BK

• 14

14

BR-BK

14

28

LG

BK

-S

LG

40

BK-S

40

29

L5

S-BK

L5

15 15

S-

BK

15

30

FW

Y-

BL

1

41

Y-BL

41

31

Spare

BL-Y

•

16 16

BL-Y

16

32

RT

Y-O 5 42 Y-O 42

33

RR

O-Y 6

17

O-Y

17

34

Y-G

LG

43

Y-G

43

35

4

G-Y

LH

18 18

G-Y

18

36

Spare Y

-BR

• 44

Y-BR

44 37

G or SG

BR-Y

4

19

BR-Y

19

38

B or

Bl

Y-S

RT

45

Y-S

45

39

R or

Rl

S-Y

RR

20

S-Y

20

40

ET

or T V-BL

ET

46

V-BL

46

41

ER

or R BL-V

ER

21 21

BL-V

21

42

A V-O EH

47

V-O

47 43

B O-V

EB

22 22

O-V

22

44

Tl

V-G

*t

48

V-G

48

45 5

Rl

G-V

*t

23

G-V

23

46

IT

V-

BR

*t

49

V-

BR

49

47

IR

BR-V

*t

24 24 BR-V

24

48

AG V-S

*t

50 V-S 50

49

LK

S-V

*t

25

S-V

25

50

*Leads individua

ll

y insul

ated

and

stored.

tFor

speakerphone feature,

terminate

these leads as shown in Ta

bleD.

Page

9

SECTION

529-225-134

TABLE

F

2568HU

TELEPHONE

SET

RINGER OR BUZZER CONNECTIONS

OPTION

S-R

Bridged ringer on

any

line *

Common or With *

private line Capacitor

ringer or Without *

buzzer§ Capacitor§

Ringer permanently *

silenced

*

Individually

insulated

and

stored.

t

Terminals

of

line involved.

:j:

RR

terminal

on

terminal

strip.

s

*

N 1A RINGER

LEADS

STRAP

(R)

R

BK

BETWEEN

K

of

net.

Tt

A of network

and

Rt

K

of

net.

RT

A of network

and

RRt

A

of

net.

RT

A

of

network

and

RRt

K

of

net. * A of network

and

RRt

BUZZER

CONNECT USING

MlW

CORD OR

EQUIV.

RT

RR

§ Connect

ringer

without

capacitor

as

common, private,

or

intercommunicating line signal un-

less

otherwise

directed.

Note:

Connect KS-8100

type

buzzer

in

place

of

set

ringer

(Fig.

6).

TABLE

G

2568HP

IMDJ TELEPHONE

SET

RINGER OR BUZZER CONNECTIONS

OPTION

5-R

Bridged ringer on

any

line A of net.

Common or With A of net.

private line Capacitor

ringer or

Without

A of net.

buzzer§ Capacitor

Ringer permanently silenced A of net.

*

Individually

insulated

and

stored.

t

Terminals

of

line involved.

:j:

RR

terminal

on

terminal

strip.

Hl

A RINGER

LEADS

s R

BK

K

of

net.

Rt

Tt

K of

net

.

RRt

RT

A

of

net.

RRt

RT

K

of

net. * *

BUZZER

CONNECT USING

MlW

CORD

OR

EQUIV.

RRt

RT

§ Connect

ringer

without

capacitor

as

common, private,

or

intercommunicating

line

signal

un-

less

otherwise

directed.

Note:

Connect KS-8100

type

buzzer

in place

of

set

ringer

(Fig. 6).

Page

10

l O Pages

)

Bell 2568HP Guide

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