~~T~S:=A11VANCE PRINTINGSERVICE

2563HB TELEPHONE SET

SECTION 502-543-400Issue 2, December 1972

1. GENERAL

1.01 This section provides maintenance andconnection information for the 2563HB

telephone set equipped with headset jacks and12-button TOUCH·TONE® dial for use with optional12-button headset.

1.02 This section is reissued to:

• Include KS·20419L1 buzzer, Fig. 1

• Show T1A ringer as replacement for NIAringer, Fig. -1

• Show 35Y3A dial as replacement for 35A3Adial.

2. MAINTENANCE

Replaceable Components

2.01 Field replaceable items are listed underidentification in the appropriate Refe~ence

section in Division 502.

2.02 Maintenance of handsets and ringers isoutlined in sections covering these components.

UxJse Card Retainers

2.03 The P-25E803 and P·269561 are nonadjustablecard retainers. The P-25E785 (MD) card

retainer is replaced by P-25E803.

~.04 If P-25E785 (MD) card retainer becomes soloose on the faceplate that the number card

or designation strip slips, they can be tightenedas follows:

(1) Remove faceplate from set.

(2) Remove card retainer from faceplate.

(3) Bend the four arms of the retainer so thatmQre pressure will be apPlied to the number

card and designation strip. The bends should

be made approximately 1I2·inch in from the tabson the ends of the arms and in the oppositedirection from the factory bent tabs.

(4) Install the card retainer on the faceplateand insert the number card and designation

strip.

(5) Install faceplate on telephone set.

Note: If adjusting the arms of the retainerdoes not result in sufficient holding power,replace the card retainer.

Removing and Replacing Housing

2.05 Sets without exclusion:

(a) To remove housing, loosen captive screwsin base of set. Lift housing up and toward

front of set.

(b) To replace housing, guide lower front ofhousing over pushbuttons, align housing with

base of set, and gently press housing into place.Tighten captive screws in base of set.

2.06 Sets with exclusion:

(a) To remove housing, pull up exclusion plungerto its operated position, loosen captive screws

in base of set, and lift housing up and towardthe front of set.

(b) To replace housing, guide lower front portionof housing over pushbuttons, align housing

with base of set, and gently press housing inplace.

(c) Depress exclusion plunger. With slightpressure it should snap into its unoperated

position.

(d) Operate exclusion plunger several times toinsure proper operation. Tighten captive

screws in base of set.

@) America~ Telephone and Tfllegraph Company, 1972Printed in U.S,A. Page 1

SECTION 502-543-400

Exclusion Switch

2.07 Perform no field maintenance on exclusionswitch and plunger other than cleaning

contacts with a 265C tool.

2.08 Replace set or exclusion switch assembly ifany of the following exclusion switch

requirements cannot be met:

(a) Exclusion plunger should remain in theoperated position when pulled up to the full

extent of its stroke.

(b) The plunger should return to the fullydepressed po~ition when handset is replaced.

(c) With housing removed, normally closedcontacts of the exclusion switch should have

perceptible follow when operated manually.

(d) With housing removed, open contacts of theexclusion switch should have minimum

separation of 1/64-inch; gauge by eye.

Mounting Cords

2.09 Cords, designed for use with 636A keyassemblies, feature slotted wafer sections

for each line appearance. This allows easyrearrangement of lines to pickup buttons.

fr No field maintenance should be1 performed on the plug ofplug-ended

mounting cords.

Lamps and Pushbuttons

2.10 Replace cracked pushbuttons or collars.Remove accumulated dirt or film from lamps,

collars, and pushbuttons with a water dampenedcloth. DO NOT USE SOL VENTS OF ANYKIND. If cleaning does not correct binding ofpushbuttons, replace button and collar assembly.

2.11 To replace defective lamp:

(1) Lift lamp from socket with KS-6320 orangestick

(2) Align lamp contact surfaces when placingnew lamp in socket

Page 2

2.12 The button and collar assembly should becarefully aligned to avoid interference with

removal or replacement of housing.

Keys~6-Type

2.13 Field maintenance of these keys consist ofcleaning contacts with a 265C tool or adjusting

with a 363 tool.

2.14 Contact follow and separation is obtainedby using a 363 tool at a point adjacent to

contact spring pile-up. When adjusting springs:

(a) There should be a minimum spring clearanceof 1/64-inch between contact springs and

those parts of the key which .do not make contactwith springs.

(b) Normally open contacts should make withperceptible follow on locking keys before key

plunger assumes locked position.

2.15 Replace set if the following requirementscannot be met:

(a) When depressed locking plunger should, onits downstroke, release any previously locked

plunger.

(b) When any pushbutton plunger is releasedfrom its operated position, it should return

with a snap to its nonoperated position.

(c) An operated key plunger should not releaseduring downstroke of hold button.

(d) An operated key plunger should release fromits operated position on the upstroke of the

hold button.

241A Amplifier

2.16 Used in telephone sets with headset jacksto amplify the output of the headset

transmitter. NOFIELDMAINTENANCESHOULDBE ATTEMPTED ON 241A AMPLIFIER.

2.17 Replace a 241A amplifier if it is suspectedof being defective (as evidenced by poor or

no transmission).

TOUCH-TONE Dial

2.18 Oheck line polarity if no tones are heard inthe receiver when a button is depressed.

ft The 3IJ-type. disl will function onlywhen the green disl lesd is positive(+) and when the orange-blsck lesdis n6/lstive (-).

2.19 A dial hand test set connected to lineterminations can be used to test for defective

dials.

ft Donotstt6mptrepsirofTOUCH-TONEdisls in the field Rep/sce defectivedials.

HandlJets

2.20 When special conditions exist the G1AR orG3AR may be replaced by the following:

_ G6AR (MD) or G6B handset for impairedhearing

_ G7AR handset for weak speech

_ G8A or G8B handset for noisy locations

3. CONNECTIONS

3.01 These sets are factory-wired for use with1A1 or 1A2 key telephone system line circuits;

155 2, SECTION 502-543-400

they can be modified for use with 1A key telephonesystems as shown in Fig. 3. The sets are equippedwith a 241-type amplifier providing headset operation.A 52- or 53-type headset must be ordered separately.

3.02 The optional kits of parts providing polarityguard for end-to-end signaling service and

station busy lamp features are not adaptable tothe present design of 2563HB telephone set. Stationbusy lamp indication, showing only that the handsetis off-hook or that the headset key is in the ONposition, can be provided for 1A1 or 1A2 KTS byuse of a KS-15724L1 diode which must be orderedseparately and connected as shown in Fig. 2. Thisconnection will not indicate that a line pickuppushbutton is depressed. Station busy for 1A KTSis a wiring option shown in Fig. 3.

3.03 The I hold feature of SD-69530-01 can beincorporated with these sets when used with

1A1 or 1A2 KTS. Telephone set wiring changesare shown in Fig. 2 and key system componentrequirements are shown in SD-69530-01.

3.04 Line exclusion feature can be provided byinstallation of a D-179935 Kit of Parts (ordered

separately). Connect as shown in Table A.

3.05 The set ringer may be connected as a bridgedringer on any line if desired (Note 4, Fig. 1)

3.06 .The 2563HB telephone set is factory-equippedwith a KS-20419L1 (10 volt AC only) buzzer.•

Pag_ 3

II

II

It

II

it

*

II

II

II

II

II

ON

OH

000 ER

0 EH

0 EB

tHS

(BR)HS

FL14(R)

(G-BK)

9

\NOTES 2,4,5, AND 6)

PU

636A KEV

IR

0 6

(BL-W)

PART or 050NMTG CORD

:iw-~;LI

~4 3

(BL-R) L2 LS;(R-BL) ~

IB(V) (BR)

atb' C

N

:(BR-R )

~(R-BR)

(O-BK) L4(V) (O-BK )

:(BK-O) ~H

/' (V-BL) n(S-BK) L5

:(RK-S) ~(V-BL) ~(BL-V)

(G-V) 6 (BL)+EXCLUSI

:(V-G)~ KS-20419LI

TO(BL-W)

AC BUZZER TABLE A (W-O) S\iITC~

04 (V-D) +

)O-W) PU (O-W)

'.~O) ..... IH , to! EXCLUDED (O-V) +

(S-W)'<.I " r STATION

( II/

I: (NOTE I) PART or os

#Sl~2H (V-BR) CLI P NO. I4TG CORD

"-'

«G-R)41 46 ( (V-BLl

II (S-R)

AR-G) r>.C3H"

(BR)R 42 , 21 (IBl-V)

, "-' /

«BL-BK )IA-H 43 47 ( (V-O)

II

«BK-BL) ~4H 44.....

B 22 ( (O-V)....,

'"X

«BR-BK) _ IIBZ 34 17 (IO-Y)

)BK-BR) ~6H (BR-BK)BZI 33 , 42 ( IY-O)

...., 31AV-s) _RT (BK) 41 «Y-BLl

~S-Y)"-'RR (S)

1A

47 49 ( (V-BR)

0 SP 48 , 24 (tBR-V)06

~ SPARE 32.....

«BR-V~G TIA ~16 «Bl-Y)

<2'K RINGER 45 48 ( (v-G)

"4-!-BR)

50 25 ( IS-V)

0 1 49 50 ( IV-S)

46.....

23 (IG-V).....

..... r>. . .(W-BL)

~ '"...., I

.- ..._IT

(BR-W)~

_ 2R (S-V)

... (W-DR)'<.I

_2T

(O-R)"-' ~ (G) LS (W)~3R 3 I....

( (R-O) ,..3T d e-v.J /

(S-R) ~4R

(R-S) .... 4T( 0 X

(G-BK) _ 5R

(BK-G) :5T", (G) LI

(6)

43

18

40

5

30

8

33

3

28

6

31

9

34

12

37

15

II

36

14

39

45

20

9

4

2

27

26

4

29

7

32

10

35

13

38

(NOTE I)

CLIP NO.R(I ) 2

T(I ) I

R(2) 8~

T(2) 7

R(3) 14 ,

T(3) 13

R(4) 20.....

T (4) 19

R(5) 26 ,-.....

T(5) 25.....

L (I ) 6

LG( I) 5-.....

L(2) 12 ,

LG(2 ) II ,L(3) 18

-<LS(3 ) 17 ,

L (4) 24

LG(4 ) 23 /

L (5) 30

LG(5) 29 ,"-

[" 36

BZI 35 ,

AI-B 4

A-H 3

B 10 ,

A-H 9

B 16

A-H-S-SI 15

B 22

A-H-S-SI 21 , I

B 28

A-H-S-SI~

B-BI 39

R-RI 40

.....

) 38IG G-SG

RD

SV BL 37

MP

BUZZERLEADS

BULA

T'5G

IA'-1A2KTS ALEADtONNS

1A'-'A2KTS LINECONNS

IAI-IA2KTS LAMPCOHNS

SECTION 502-543-400

Fig. l----i2563HB Telephone Set, Connections (Sheet 1 of 2>.

Page 4

-----------------;;.55 2, SECTION 502-543-400

,----------,(O-BKI

PART QF 35Y3A DIAL I(Rl (STRAPI ,§

J (BLI !: I(Rl Tt (RI

Btx w e y

(S-BKI (51 7 (BKI

6 7

5 (S-Vl 48

(V-GI 58 (W..BRI

G3ARHANDS£T

TRMTR

IBK-Sl

(R-GI Rt (W-GI

(STRAPI

B (G-Vi B (WI

RCVR

(BICI

st (WI 52-OR53-TYPEHEADSET

TRMTR

~ LWv

d(.,R)o 0

3§ 18K)

o ·

(BLI (STRAP)IRI

(V-Gl

LS!lW-BL)

IIIIL ..J

(G)

RRt (8K)

GHt (WI

RCYR

2

6o

31------+-0

4

425K NETWORK

..-- ~R

RR 8

241A AMPliFIER, SERIES II.(NOTE 91

C

0 L2

0 L1

0 F

l=:!~~~~c::::~6N0 6

0 T

0 5

NOTES:I. 66E-TYPE CONNECTING BLOCK SHOWN. MOUNTING C~D NAY BE PLUGGED DIRECT~Y 'NTO

CONNECTOR CABLE. CORD AND PIN NUMBERS FOR CONNECTOR CABLE ARE ·SAME ASMOUNTING CORD.

2. CQNNECTIONS FOR TIA RINGER SHOWN. CONNECTIONS FOR NIA RINGER IDENTICAL EXCEPT INSU~TE

AND STORE (S) AND IS-RI LEADS.

3. 'F EXCLUSION FEATURE IS AOOED, CONNECT SWITCH LEADS PER TABLE A.4. FOR BRIDGED RINGER ON ANY LINE CONNECT (R) RINGER LEAD TO II or NETWORK ANQ

(BK) RI~ER LEAD TO TIP or LINE INVOLVED. CONNECT (S) STRAP FRON A OfN£TWORK TO RING Of LINE INVOLVED.

S. IF CAPACITOR IS NOT REQUIRED IN RINGER CIRCUIT, NOVE (R) RINGER LEAD TO A OFTHE NETWORK.

6. TO SILENCE RINGER PERMANENTLY CONNECT (R) AND (BK) RINGER LEADS TO K OF T"ENET\IORK.

7. LINE SWITCH SEQUENCE, HANDSET REMOVED:b-c MAKESd-e MAKESf-g BREAKS

8. 644A KEY SEQUENCE:3 AND 4 MAKE FIRSTI AND 2 HAKE SECOND

9. SET MUST BE EQUIPPED WITH A 241A SERIES II AMPlIFIER IF EXCLUSION FEATURE ISAOOED.

10. IF HOLD POSITION LAMP IS REQUIRED, USE SPARE LEADS AND SPARE TERMINALS OR0-161488 CONNECTORS.

* - INSULATED AND STOREDt· NETWORK TERMINAL-UNOESIGNATED TERMINALS ARE ON KEV TERMINAL BOARD.§ - 241A AMPLIFIER TERMINAL

PU- PICKUP KEY .H- HOLD KEY

LS- LI NE Sill TCHHS- HEADSET ON~OFF KEY (644A)FL- FLASH KEV (644A)

Fig_ l-t2563HB te.ephone s.t, Connections (Sheet 2 of 2>.

Page 5

SECTION 502-543-400

(G- BKI HS (BR)*

'(" (0-" I,,, t: ,B.,* ,IB LS

®<

®I®~

N

H

A. WITHOUT I; HOLD

(G-BK) HS (BRa

44 (BL (Y-BRI ,

LS

c

a

04

(BRIt

~ .3_ (S-Y) FL (Rl* N H

(GIM~KI*

LS* HS(WI

(S-RI 9o.-.!!l*.1ct

\ (BRIt HS (G-BKlt

® 1B (O-WI IB ® ®

(Ylt b

-0

" G OR SG (BR-Y) SG,

®

2

19

44 ( ,-- •. no *

6

®®

AI (O-WI (Y) . t (BR) * I

" IB LS /,BL (Y-BR)

SP (BR-V)* 4

" ®(o-BKI*

®

M"" ADD STRAP ~ I (Ylt ®

2

44

24

B. WITH r HOLD

H-HOLD KEY

HS-HEADSET ON-OFF KEY

LS - LINE SWITCH

® - WITHOUT BUSY LAMP

0-WITH BUSY LAMp, USE KS-15724, LI DIODE

* -LEADS INVOLVED IN MODIFICATION

NOTE;ALL TERMINALS ARE ON KEY TERMINAL BOARD.

H- HOLD KEY

FL-FLASH KEY

HS-HEADSET ON-OFF KEY

LS - LINE SWITCH

®-WITHOUT BUSY LAMP

0- WITH BUSY LAMP

t - NETWORK TERMINAL UNDESIGNATED TERMINALSARE ON KEY TERM INAL BOARD.*-LEADS INVOLVED IN MODIFICATION

Fig. 2-2563HB Telephone Set-1 A1 or 1A2 KeyTelephone System, I Hold and/or StationBusy Lamp Modifications

Fig. 3-2563HB Telephone Set Converted for 1A KeyTelephone System, With or Without StationBusy Lamp

Page 6

ISS 2, SECTION 502~543-400

TABLE A

CONNECTIONS FOR LINE EXCLUSION KEY

EXCLUSION KEY LEADS

EXCLUSION KEY TEL SYSBL.W W-BL O.W W.O V-BL BL.V V-O O-V

IA R* T* IBt H* ET ER EH EBOn any line

IAI or IA2 R* T* EB H* ET ER EH EB

* Connect to terminal of line being excluded.

t When other than Line I is excluded in a lA key telephone system, remove the O-W mounting cordconductor from terminal IB, insulate and store. Connect balance lead cord conductor of line in­volved to terminal IE.

Note: To allow access to and operation of the exclusion switch plunger during headset operation,handset must be lifted and left off of its cradle. Returning handset to on-hook position cancelsexclusion.

TABLE B

PICKUP·SIGNAL KEY CONVERSION

CONVERTIBLE KEY LEADSKEY

OPTIONSY-IR IR S.R BR.BK

HPPPPP M M M XHPPPPS M M M SGHPPPSS M M SG .XHPPSSS M X SG XHPPP*P*S* M X 5H NtHPP':'P*P':'S* X X 5H Nt

,> These pickup ke~' options use line switch or headset switch controlle'd ground through the' common signal

key and the S lead of the selected line to operate a common signal rela.l".

t 1"01' lA KTS connect to terminal 1. Obtain common signal ground through (Y) line switch lead or (G-BKlheadset key connected to SG terminal.

Note 1: All convertible key positions are arranged in the factory as pickup positions. To converta key position from pickup (locking) to signaling (nonlocking), remove the P-12A892screw detail from plunger at the key position to be converted. Make necessary connectionchanges as shown in Table B. To convert a key position from nonlocking to locking, in­sert P-12A892 screw detail.

2: When keys are converted for signaling, the S lead of key involved provides the signal cir­cuit and SG lead provides the common signal ground.

Page 77 Page.