Bell 502-322-400 Service Manual

BELLSYSTEMPRACTICES SECTION502-322-400
AT&TCo Standard Issue 10, July 1981

SERVICE

AC- AND AD-TYPE TELEPHONE BASESWITH

220_, 226-, 2220-, AND 2226-TYPE HAND TELEPHONE SETS

CONNECTIONS

1. GENERAL the dial light will be extinguished

1.01 This section contains information for the AC1 will flicker during the run down op-

(MD), AC1P, AC2 (MD), AC2P, AC2PH, AD1 eration of the dial

(MD), AD2, AD3, and AD3H telephone bases and as-
sociated 220A (MD), 220C, 220AL, 220AM, 226A, __ For tip party with identifying

hand telephone sets. For additional information on telephone sets are provided, it will
2220B (MD), 2220C, 2220BM, 2220BMG, and 2226A _ ground when the LED-type hand

hand telephone sets, refer to Section 502-303-102. be necessary to open the handset

manufactured prior to 10-1-72 and
any base which is opened for any If AC2, A C2P, or AD3 bases are pro-

reason should be rewired as shown vided and tip party with identifying
in Table A before proceeding with ground is required, 220A, 220AM,

AH AC1 and AD1 telephone bases _ connections as shown in Table D.

connections shown in other tables. 2220B, 2220BM, and 2220BMG

1.02 This section is reissued to:

• Delete D6AP mounting cord from Fig. 11 TRIMLINE ® components and associated ap-

• Revise Table B.

1.03 Refer to Table B for identification of

paratus.

1.04 If a 2220B or 2220BM hand telephone set is

and that the rotary-type dial light

refer to Section 502-303-102. Make

hand telephone set cannot be used.

2226A hand telephone sets are 180984 Kit of Parts must be ordered separately and
equipped with light emitting diodes installed. The 2220BMG hand telephone set has a po-

The 220C, 220AL, 226A, 2220C, and provided and a polarity guard is required, a D-

(LED) for dial illumination. This larity guard installed from the factory. The 2220C
type of illumination may not be viM- and 2226A has a built-in polarity guard.
ble in normal light.

1.05 The 220AL, 220AM, and 2220BM hand tele-

telephone sets is supplied from the for the H4DU (modular) handset cord.
central o£fice battery over the in-
Power for all the LED-type band phone sets are furnished with a 227D adapter

coming line. No external ac power is 1.06 The D-180824 Kit of Parts (for tip party iden-
required for dial illumination, tification) contains a terminal board and 227C

adapter. The 227C adapter replaces the 227D adapter

set is provided, instruct the cus- extends the tip and ring into the hand telephone set

tomer that during the time a and provides two (2) spade-tipped leads to be con-
When an LED-type hand telephone in the 220AL hand telephone set. The 227C adapter

TOUCH-TONE ® button is depressed nected to the network inside the hand telephone set.

Not for use or disclosure outside the

Bell System except under written agreement

NOTICE

Printed in U.S.A. Page 1

SECTION502-322-400

The terminal board mounts inside the telephone 1.12 To silence ringer, rotate dust cover until open-
base. Refer to Fig. 7and Table D for connection infor- ings line up with access holes in top of gong

mation. For additional information, refer to Section and remove stopscrew.

502-303-102.

1.07 The D-180825 Kit of Parts (for tip party iden- 2220BM, or 2220BMG only) with 1A1, 1A2, 6A,

tification) contains a terminal board and a or 6B KTS, a 623T6 jack and D6AM mounting cord

282A (MD) or 282B adapter. The adapter is required must be ordered separately. Only the AD2 and AD3

in the 220C, 226A, 2226A, and later version of the bases can be wired for this type service. Refer to Fig.
2220Chand telephone sets. This adapter provides two

(2) additional wire spring contacts which are con-
nected to two (2) spade-tipped leads to be connected

to the network inside the hand telephone set. For 1.14 To provide message waiting and dial light fea-
additional information, refer to Section 502-303-102. tures without KTS (AC1, AC1P, AD1, and

The adapter is not required in the early version 2220C AD2 bases only) and 220A or 2220B hand telephone
hand telephone sets only the terminal board is re- set, refer to Table I.
quired. The terminal board is positioned inside the

base over the handset cord jack inside the telephone 1.15 The 226A and 2226A hand telephone sets are
base. Refer to Fig. 6 and Table D for connection infor- for customer's with impaired hearing. These

mation, handsets provide up to 20 dB of receiver gain in the

Note: In the early version 2220C handsets, Section 502-303-102.
remove the (W) or (Y) and (BK) spade-tipped

leads from their stored location and connect to 1.16 A D-180719 Kit of Parts is available for use by
terminals A and B or 4, respectively, customers with hearing aids which are

1.08 A D-180891 Kit of Parts is available to modify parts provides a supplementary field used by the

2220C and 2226A hand telephone sets and as- pickup feature of the hearing aid. This kit is intended

sociated AC- and AD-type telephone bases for RFI in for use only with the 220C, 226A, 2220C, and 2226A
the on-hook position. Refer to Section 502-303-102 for handsets. For additional information, refer to Sec-

handset wiring changes and Section 500-150-100 for tion 502-303-102.
wiring changes to the bases. Also refer to Section

500-150-100 for RFI in off-hook position. 1.17 A D-180697 Kit of Parts [426N (MD) or 813BH

1.09 If a D-180036 or 28A ringer isolator is used for diode] is required for 4-party full selective and
ringer isolation or to extend the ringing range

of these sets, refer to Sections 501-375-100 and to Table E for connections.
501-375-101, respectively for connection information.

1.10 A 603A ringing extender can be used when AC2PH (wall)and AD3H (desk)are available
only the ringing range is to be extended. Refer for use in critical care areas. These bases are manu-

to Section 501-380-102 for connections, factured to meet National Electrical code and Na-

1.11 If a dial light transformer is required (220A, requirements for hospital sets. For additional infor-
220AM, 2220B, or 2220BM only), use a 2012A mation, refer to Section 502-303-101.

or C transformer or equivalent 6-volt supply. For
additional transformer information, refer to Section 1.19 Refer to Fig. 11 for AC2PH or AD3H tele-
501-136-100. phone base connections.

1.13 To provide dial light (220A, 220AM, 2220B,

10 and Table G for connections.

receiver circuit. For additional information, refer to

equipped with telephone pickup features. The kit of

8-party semiselective ringing for all type bases. Refer

1.18 Special hospital telephone bases, coded

tional Fire Protection Association Part 76B

Page2

ISS 10, SECTION502-322-400

TELEPHONEBASE H4DB, H4DU, 220A, 220AM,

42A CONN BLK TERMINAL HANDSET CORD OR 2220BMG

(Y) (NOTE I) BOARD (NOTE 2, 6 HAND TEL SET

TO DIAL v.v < < ) > _ DIAL

TRNSF -- (BK) I

B (BE) 3

LIGHT I I LIGHT

____ (BK) < < > >

(G) --_D \ - l"

TIP (G) (G) & LI

PROTECTOR _ 500_ (NOTE 2
TO i [(NOTE 3)

(BK). T -- ( - _ _ RECALL

(BK) MESSAGE

= _I_NAITING

; 500_ I"-'LAMP

(S) AND 5) _) (W) (NOTE 5) <

_ 1650_ SWITCH

(S-R) (NOTE8)

(Y) (NOTE5)

(G) I I

G CONTACTS

C)

H5AAOR H5AD 2220B, 2220BM,

AND 7) (NOTE9)

I(R)

-

f_

(s)

(p_A-- (BK) STRAP

a q-- (NOTE5)
b (Y) _ L2

>((BR) C

c _ < )):I-

RING (R) (R) I I

NOTES:

I. INSIDE WIRE CONDUCTOR SHALL BE CONNECTED TO THE GROUND TERMINAL AT THE

PROTECTOR OR EQUIVALENT ONLY IF REQUIREDFOR THE SERVICEBEING INSTALLED.

2. DISCONNECT (S) LEAD FROM TERMINAL B WHEN H5AA HANDSET CORD IS USED AND TIP
PARTY IDENTIFYINGGROUND IS NOT PROVIDED INSULATEAND STORE.

3. LAMP AND RESISTOR ARE PART OF H5AO HANDSET CORD REQUIRED FOR MESSAGE WAITING

FEATUREONACI BASE ONLY. IF 220AM OR2220BMHANDTELEPHONESET IS PROVIDED,
THE 227-TYPE ADAPTERMUSTBE REMOVED.

4. SET WIREDFOR INDIVIDUAL ORBRIDGEDSERVICE, FORALL CLASSESOF SERVICE
REFERTO TABLEC.

5. REFER TO READ IN 1.01 AND TABLE A FOR ADDITIONAL INFORMATIONON WIRINC
ARRANGEMENT AND LEAD COLORS OF ACI BASESMANUFACTURED PRIOR TO 10-I-72

6. H4DB OR H4DU HANDSETCORD SHALL BE U_ED FOR INDIV.OR BRIDGED RINGING, RING
PARTY, AND TIP PARTY WITHOUT IDENT.GRD.

7. WHEN H4DU CORD IS PROVIDED A 227D AND 231B ADAPTER IS REQUIREDON ACI BUT
227D ADAPTER ONLY IS REQUIRED ON AC2.

8. INSULATEDAND STORED ON EARLY VERSION ACl ONLY.

9. 220AM, 2220BM, AND 2220BMG ARE EQUIPPED FOR H4DU HANDSET CORD.

INSULATEDANDSTORED

Fig. 1--ACI (MD) or AC2 (MD) Telephone Base, Connections, With 220A (MD),

220AM, 222OB (MD), 2220BM, or 2220BMG Hand Telephone Set

Page 3

SECTION502-322-400

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Page 4

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NOJ.O=lJ.O_d OJ.

ISS 10, SECTION 502-322-400

INSIDE _._ CONN .........

WIRE _.._ BLK _ MTG CORD !i_ l RINGER _J SWITCH _,E: wOARD I HANDSET CORD iU OR 2220BMG

• (Y' "_ _}t _ (NOTE 4) _i j _ (NOTE' ANO 8) _ HAND TEL SET

(NOTE I) i_i_._.;_ i_ • it :i i!i_._i _ (NOTE 9)

@ I

TO r _-_ (_ _ (W) iiii_i_ (y) _) (NOTE6) (Y) _i_!_ >i_> D

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:.!ili!iiii

LIGHT

/

TRANSF _" iiiil)i::i --

iiiiii!iiiiii(SKI ,_iii_i}!il _ _ tiNN I DiAL

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.... ii::iiiiii ::iii::iii!, (eK) _

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iiiiiiiiii :5 ,0. iiiiiiiiii iiiiiiiiii .......... ::::i::::::::i:: CONTACTS

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SWTCH

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NOT ES :

1. iNSiDE WIRE CONDUCTOR SHALL BE CONNECTED TO TIIE GROUND TERMINAL 5. CHANGE TO 5_5A LAMP IF COMBINED LENGTH OF HAND TELEPHONE
AT THE PROTECTOR OR EQUIVALENT ONLY IF REQUIRED FOR THE SERVICE SET CORD AND (ADI BASE) MOUNTING CORD EXCEEDS I_ FEET.
BEING iNSTALLED. 6. REFER TO READ IN 1.01 AND TABLE A FOR ADDITIONAL INFOR-

2. DISCONNECT (S) LEAD FROM TERMINAL B WHEN HSAA HANDSET CORD MATION OR WIRING ARRANGEMENT AND LEAD COLORS OF ADI

IS USED AND TiP PARTY iDENTIFYING GROUND iS NOT PROVIDED BASES MANUFACTURED PRIOR TO I0-I-72.
INSULATE AND STORE. ?. H4DB OR H4DU CORD SHALL BE USED FOR INDIVIDUAL OR BRIDGED

_. LAMP AND RESISTOR ARE PART OF H_AD HANDSET CORD REQUIRED ; RINGING, RING PARTY AND TiP PARTY WITHOUT IDENT. GRD.

FOR MESSAGE WAITING FEATURE. iF 220AM OR 2220 BM HAND 8. WHEN H4DU CORD IS PROVIDED A 227D AND 2_IB ADAPTER
TELEPHONE SET IS PROVIDED, THE 227-TYPE ADAPTER MUST IS REQUIRED.
BE REMOVED. 9. 220AM, 2220BM, AND 2220BMG ARE EQUIPPED FOR H4DU

4. SET WIRED FOR iNDiViDUAL OR BRIDGED SERVICE FOR ALL HANDSET CORD.

CLASSES OF SERVI CE REFER TO TABLE C. _ INSULATED AND STORED

Fig. 3--AD1 (MD) Telephone Base, Connections With 220A (MD), 220AM, 2220B

(MD), 2220BM, or 2220BMG Hand Telephone Set

Page 5

SECTION502-322-400

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Page 6

ISS 10, SECTION 502-322-400

INSIDE WIRE (ACI OR AC2) i_i!_i TELEPHONE BASE

AC2P) MTG CORD JACK (ADI) RINGER iI!!itl _ (NOTE 5) i_ CORD JACK ADAPTER U,HANDSET
623T4 JACK (AD2 OR AD3) CORD HAND TEL SET

,NOTE 3) Hiiiiii)i _i_! _ii (NOTE 4)"

523-TYPE PLUG (AClP OR __il P1A OR P3A -iiiiil LINE SWITCH ._ TERN. BOARD !_j_i HANDSET 231B _) H4DU 220C 220AL

•t(w) ::!!iiiiiii!i iiilIiiiii G iii_i

(NOTE 2)::iii":i! _i i!) 226A', 2220C' OR 2226A

_E_I!_ ::_:.'::::.: .:.:.::_,:

_::_::_:;:;i_i (G) iiiiii _i.'::::_!_(G)

: (NOTE I )

ii!!!!ilq ,w, iiiiiiiiiiii l _ii)i)ii)

T,P (G, (BK, ii!iiiiill i_ii (_ L, I ii_illl

;- _iiii ii_ , iiiiii))i

, _ooa i;iiiiii i)i!!)i)

_. !!!::!ii _::_:;:: :::..:.-.-:::::

(s_ iiii;iii!i iiil)i_;il)i I iiiii)iiti

_.1650,0, _!!_ )il :::::: ::iiiii RECALL

_" _ii_i_:: i_ii::i::i_ ::::i::iiiiiii:: C0 NT ACT S

!__i!! i :_:_:_:_:_:_ I :::::::::

(S- R) # :!:i:i::: _:_:_:E:_:E: _:E:_:_:!_:

i:.::!:!:_:_:I :!:_:i:_:':_ I _:_ SW ITCH

ili)i!!i!iiiiii)

ii!ii!!!i iiili iiiiiiiiii

R,N_(_) i::iii::iiiii_I _::_ s_._ _i_::_::_::_::_::

GRD (Y) iiiiiiiiii _

(NOTE 6) ))))))))))) (0) _))))))_)))4 iiii::.:j: (BK)

NOTES: 5. REFER TO READ IN 1.01 AND TABLE A FOR ADDITIONAL INFORMATION ON

1. DIAL LIGHT TRNLSF NOT REQUIRED. DIAL LIGHTING IS MIRING ARRANGEMENT AND LEAD COLORS OF ACI AND ADI BASES
PROVIDED BY LIGHT EMITTING DIODES (LED) IN THE MANUFACTURED PRIOR TO 10-I-72

HAND TEL SET WHICH IS PONERED BY CO BATTERY OVER 6. INSIDE MIRE CONDUCTOR SHALL BE CONNECTED TO THE GROUND TERMINAL AT
THE INCOMING LINE. THE PROTECTOR OR EQUIVALENT ONLY IF REQUIRED FOR THE SERVICE BEING

2. WIRED FOR INDIVIDUAL OR BRIDGED RINGING. FOR ALL INSTALLED.

CLASSES OF SERVICE REFER TO TABLE D. '7. (M) LEAD PROVIDED IN ACI(MD), AC2(MD), AC1P, ADI(MD). AND AD2

.5. FOR CONNECTING BLOCK INFORMATION REFER TO APPROPRIATE TABLE. BASES ONLY

4. 251B ADAPTER NOT REQUIRED ON AC2, AC2P, OR AD_ BASES. i" AD1 BASE ONLY

iiili I ii!iiiii! ;iii!!ii

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_ iiiiiiiiiiii iiii)iii!ili

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::iii::i_?i_!

INSULATE AND STORE ON ADI ONLY

Fig. 5_ AC1 (MD), AC2 (MD), AC1P, AC2P, AD I (MD), AD2, or AD3 Telephone Base,

ConnectionsWith 220C, 220AL, 226A, 2220C, or 2226A Hand Telephone Set,
Wired forIndividual or Bridged Ringing

Page 7