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AT&T Bell System 7A, Manual

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SECTION  S 

1 8-450-1 00 

OK 

Line  button  restores;  lamp 

flashes.  Background  music 

heard by held party. 

OK 

Background  music  removed; 
voice  conversation 
reestablished. 

Page 

1 22 

TABLE  AH 

MUSI C  ON  HOLD 

Call  in progress 
on  CO/PBX  line. 

Hold  button  depressed 
at  7 A  station. 

Line  button  depressed. 

FAI L U R E  

(a)  Line circuit troubles­

refer to sequence on 
line circuits 

(b)  No background music 

1 .   COAM  music  source 

defective,  wrong 

connections,  or 

improperly  set  volume. 

2.  Defective  33A  coupler 

or  fuses  operated. 

3.  Open  MT  and/or  MR  lead-

33A,  4518. 

4.  Open  R(CO)  or  R(STA). 

FAI LU R E  

1.  Defective  tel  set. 

2.  Defective  line  circuit. 

Summary of Contents for Bell System 7A

Page 1: ... Automatic Button Restoration 38 B Common Audible 38 CONTENTS D Pickup Hold and Illumination E Tone and Voice Signaling F 2 Path Intercom OPTIONAL FEATURES A CO Ringing B External Signaling Circuit C Intercom Preset Conference D Music On Hold E Ring Transfer F Paging and Background Music G Power Failure Ringer H Power Failure Transfer I Privacy J Privacy Release K Recall L Speakerphone 3B Speakerp...

Page 2: ...ON HOLD 45 1 A OR B KTU 83 POWER DISTRIBUTION 83 1 GENERAL 1 01 This section contains identification installation connection operation and maintenance information for the 7A Communication System 1 02 This section is reissued to Rate the 832B 2832B 832C and 2832C telephone sets MD Add information on the 832BM 2832BM 832CM 2832CM 832DM 2832DM and 832EM 2832EM telephone sets Add information on the 57...

Page 3: ...urce intercom preset conference station busy console with direct station selection DSS station busy console with message waiting MW intercom only telephone sets TOUCH TONE dialing speakerphone external signaling circuit and connection to customer paging 2 02 In the 7A Communication System each station has access to all CO PBX lines and both intercom paths One station selected as the attendant stat...

Page 4: ...each telephone set all equipment connections are factory wired to the connecting blocks Page 4 All station connections are made on the station connection f ield blocks using standard color code cutdown This eliminates the need f or an external cross connection f ield except when using satellite wiring plan 2 05 The block and column on which a station is cut down determines the intercom code assign...

Page 5: ...e Fll 1 2 70G 24Vdc SIG Paging Amplifier F12 3 4 70H C Battery F13 1 1 3 70A lOVac First Intercom Path Lamp F14 Second Intercom Path Lamp POWER UNITS 19C2119C2A 19C3 FUSE AMP FUSE DESIG TYPE FUNCTION Line Fl 2 MDL 2 AC Input Power 18Vac 19C2 2 24C Console Lamp Supply and 19C2A only lOVac Lamp and Lamp Flash lOVac 5 24F Lamp Wink 24VdeB SIG 3 24B B Signal Battery 24Vde A TLK 2 24C A Talk Battery 21...

Page 6: ... station codes 4 through 19 2 06 The fuse panel in the 570A KSU utilizes 70 type indicator fuses to give a visual indication of fuse status The 19 type and 215C1 power units are equipped with 24 type fuses which do not provide a fuse status indication See Fig 6 and Table A 2 07 The lamp panel in the 570A KSU provides SECONDINTERCOMPATH LAMP a status lamp for each CO PBX line and intercom path The ...

Page 7: ...LINES AND THE NU BERS SHOWN IN BRACKETS I I REPRESENT THE 7 PAIRS OF PAGING TERMINALS ALL NU BERS AND LETTERS ARE FOR REFERENCES ONLY AND DO NOT APPEAR ON THE BLOCK FACTORY PROVIDED STRAP ON INSTALLER SIDE OF CONN BLK t FACTORY PROVIDED COMMON AUDISLE DIODES COMMON AUDIBLE IS FACTORY STRAPPED TO CODE 0 ATTENDANT STATION TERMINALS 4E SE AND 9F ARE STRAPPE D TOGETHER ON FACTORY SIDE OF BLOCK FACTORY...

Page 8: ...NOTES I DIODES SHOWN COMPRISE FACTORY WIRED POLARITY GUARD 2 THE FOLLOWING TERMINALS ARE STRAPPED ON THE FACTORY SIDE OF THE CONNECTING BLOCK LINE 2 DIODES LINE 4 DIODES 12A TO 12C 128 TO 120 12E TO 12G 12F TO 12H 16A TO 16C 168 TO 160 16E TO 16G 16F TO ISH 20A TO 20C 208 TO 200 20E TO 20G 20F TO 20H 24A TO 24C 248 TO 240 LINE 6 DIODES Fig 4 Terminal Arrangement for Connecting Block 2 ...

Page 9: ... f G H I o o I o o o o o o 5 o o 5 o o C 0 0 o o 10o o 10 o o o o o o C 0 0 1 5 o o 1 5 o o C 0 0 C 0 0 o o o o oo o o o o 2 C 0 0 C 0 0 C 0 0 C 0 0 C 0 0 C 0 0 o o 0 C 0 0 o o 0 0 c o o 0 0 o o o o o o o o o 0 0 0 0 0 0 0 0 o 0 0 0 0 0 0 0 0 4 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 5Q0 0 0 0 0 0 0 05 CONN BLK 4 12 13 14 15 16 17 18 19 A B C D E f G H I I 5 5 C o o o o 10 IO o o o o o o o...

Page 10: ...IJ 51 SIC 24V0C 0 B 5 1Jr lA TAL 24VDC 0 21 CO PBX L INE CIRCU IT CO PBX LINE C IRCU ITS 0 l 0 l l J KS 19175 Ll INTERRUPTER KTU J6 0 LINE 2A FI 400G KTU J7 457C KTU J15 4566 KTU J 16 PAGING VOICE AMPL AND 455A KTU J17 TONE R lNG TONE SIG ALERTING GEN CKT Fig 6 570A KSU Connector Fuse and Lamp Arrangement Page 1 0 451 B KTU J18 MUSIC ON HOLD ...

Page 11: ...on to the attendant s telephone set to provide the message waiting feature ISS 3 SECTION 5 1 8 450 1 00 Note Up to three selector consoles in any combination can be used in a 7A Communication System Refer to Table C for color suffix 2 1 0 Console Power Requirements If more than one console is to be used lamp power 18V 2A must be provided by a 215C1 power unit installed in the KSU or an equivalent ...

Page 12: ... a load to the 457C KTU equivalent to one loudspeaker and provides an output impedance to the COAM equipment of approximately 300 ohms The output is transmitted to the COAM paging equipment through a transformer which is both electrostatically and electromagnetically shielded to minimize the possibility of introducing noise A potentiometer with screwdriver adjustment slot is provided to Page 1 2 u...

Page 13: ...olume control The K8 loudspeaker is furnished with a walnut woodgrain finish E KS 16846 L2 Loudspeaker 2 1 5 The KS 16846 L2 loudspeaker Fig U is an outdoor speaker used for paging It is 7 112 inches in diameter 7 inches deep and weighs 3 1 4 pounds The loudspeaker is equipped with a swivel mounting bracket having three holes in the outer rim for mounting on a flat surface The loudspeaker will als...

Page 14: ...ING CLIP WOOD CASE TERMINAL STRIP QUAD INSIDE WIRE TO KEY SERVICE UNIT I I I I I I I I w REAR VIEW 1 LOUDSPEAKER MAY BE MOUNTED OVER OUTLET BOX I _ _ WALL OR MOUNTING SURFACE VIEW A A Fig 10 KS Loudspeaker Connections and Mounting Page 1 4 10 3 41N ...

Page 15: ... the following Rotary dial selection Nineteen dial codes nine single digit and ten 2 digit codes Note In the 7A System the first digit of the 2 digit code is 1 therefore 1 is not available as a station code Code 2 is dedicated to paging which leaves codes 0 attendant station and 3 through 19 available for station codes Do not use a 424A KTU in the 7A System C 440A MD KTU TOUCH TONE Adapter Circuit...

Page 16: ...CE I I I LAMP FLASH SEQUENCE li INC ANS OR RING INIT HOLD cr CYCLE CALL A R 0 R B 0 R 0 P 0 c R 0 0 INTERRUPTER L 0 R 0 R RELEASED 0 OPERATE FOLLOWS RINGING r P 0 CONN L___ CO OR PBX LINE T R KEY TEL SET 1 s PU HOOK KEY r r NET I I 1l A1 HOLD I I LOUD RG KEY LGq r TONE GENERATORII II RG J I LAMP PWR SUP I I LG INTERRUPTER I NR SUP MG tl I 20 26 VDC I R SUP J T CO R CO I T STA A 105V t RN 10V t L L...

Page 17: ...O W N CONNECTED O P T I ON P LUG STORA G E P OS I T I ON FOR USE l i EN ASSOC I ATED O P T I ON I S REQUI RED R3 A2 A1 O P T I ON w ISS 3 SECTION 5 1 8 450 1 00 RT2 82 RT1 1 8l CONNEC OPTION P LUG FACTORY TO TE RMINALS PROVIDED 82 83 A1 A2 C2 C3 Fig 12 Condensed Functional Schematic of 400 Type KTU CO PBX Line Circuits Sheet 2 of 2 Page 1 7 ...

Page 18: ...R T 4 RIB lrLJ Rl R R CRS 6 CR4 RAN I TUO I t Q4 Rl4 B Rl2 R23 8 4 RIS TRANSISTOR I CKT Q7 6 CR6 24 6 I Y3 TRI I L 6 24 6 24 7 I R4 TRI 24 Y4 TR 8 R Y5 Y4 TR A T Y2 fR Y4 Y5 Y3 k_TRI t Y5 Yl TR 611 AIS 837 614 Al2 All Al4 Al4 A26 A27 A26 A24 A25 AI A21 AO A20 All A30 A9 A29 A22 A2l A39 AlB rpfO CONN 1 8 BAT 6 ORO TG ss VS7 VSI7 VSIO vso Y 11 VSI4 VS4 VSI3 VS3 VSI6 VS6 VSI5 vss VSIB VS8 VSI9 VS9 VS...

Page 19: ...R TRANS ISTOR CKT Ql8 LOll GROUP L IMITER TRANS ISTOR CKT Q 17 R42 R44 R45 R43 24 L4 L3 L2 Ll H2 HI H3 Ll L3 HI L4 HI L3 H3 L4 H3 L3 HI H3 Ll H2 24 Fig 1 4 Condensed Functional Schematic of 440A MD KTU TOUCH TONE Adapter Circuit 821 TO 460A KTU TO 4248 C KTU r o 460A KTU TO PO IER SUPPLY iii V _ V m I 0 z co J 0 0 ...

Page 20: ...eatures on intercom calls Ringing tone to calling party Tone alerting signal to called party Voice signaling to called party Input signal to paging amplifier Page 20 The 456A will be rated MD but can be used in all installations where paging feedback or radio frequency interference are not problems Paging feedback is in general an installation problem and changeout to the 456B will help only in ma...

Page 21: ...GER TO 5TH LINE RINGER TO 6TH LINE RINGER TO 7TH LINE RINGER TO POWER SUPPLY H Fig 1 6 Condensed Functional Schematic of 452A KTU Power Failure Transfer Circuit I 4608 KTU 2 Path Intercom Access Circuit 2 26 The 460B KTU Fig 20 is an 8 inch unit that contains two separate intercom paths Path selection is based on operation of the associated intercom button on the key telephone sets The unit also p...

Page 22: ...eatures provided by these kits and their applications Later model telephone sets have these features built in at the factory A D 1 80486 Kit of Parts Privacy 2 29 The D 180486 kit of parts provides a privacy or lockout feature A station equipped with Page 22 a privacy circuit is prevented from picking up a busy CO PBX line Intercom lines have no privacy B D 1 80487 Kit of Parts Ring Transfer 2 30 ...

Page 23: ...J_R28 24 24 Cl7 Rl7 C7 C9 I RIS Rl6 f R25 CR3 A A Rl4 CI3 I Rl9 A R6 A R24 R22 CR6 CR5 A A 24 I TRANSISTOR L 24 I CIRCUIT R7 RB Q3 Q4 15 R23 R21 14 TRANSISTORI RVI r CIRCUITS j C4 R9 QS Q6 YE I CRI 24 Fig 1 8 Condensed Functional Schematic of 4568 KTU Voice and Tone Alerting Circuit 19 18 PA TO 457C KTU BY I J TO SS 424C KTU A GRD v 0 z 0 0 ...

Page 24: ...tory Connected RELEASE Field Provided Note 3 Field Connected Factory Provided RING Factory Connected TRANSFER Field Provided Note 4 Field Connected Note 1 Kit of Parts D 180591 Note 2 Kit of Parts D 180486 Note 3 Kit of Parts D 180488 Note 4 Kit of Parts D 180487 10 BUTTON SETS 1 1 BUTTON SETS 832B MDI 832BM 832A A M 832DM 2832A A MI 2832B MDI 2832BM 2832DM Only one of these features can be added ...

Page 25: ...E D 1 80656 Kit of Parts Shelf for Wall Mounting Telephone Sets 2 33 The D 180656 kit of parts provides a method for wall mounting COM KEY telephone sets The D 180656 kit of parts consists of a shelf assembly ivory colored and a retaining clamp The shelf will incline the telephone set 15 degrees from the horizontal to facilitate its use This kit can be used with any of the 832 or 2832 type telepho...

Page 26: ... RCUIT I L 1 R6 R8 Cl CRS RS CR3 I I I I I I I I I I I I I I L _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ j A TRANSISTOR I I CIRCUIT Q9 SCI L I A I R30 R33 ll 24V A A R9 rtRST CIRCUIT SECOND CIRCUIT 4608 KTU LBI B 24V SCI LBI Lr SCI tr LBI Lr SCI LBI SC I SC I t A 24V R21 c6 1CRI I ITRANSISTOR CIRCUI T I CRB IQ6 Rl7 l RIG T R I S R19 A R20 I l I 24V A R13 A tiOV R14 B 24V Fig 20 Condensed Functional Sche...

Page 27: ...IJ A 24V l 24V OV A A A 8 1 8 1 5 1 7 ISS 3 SECTION 51 8 450 1 00 P 0 CONN BR LK RH Ill 1 1 MS MG IRI ITI TC RC DO IT2 IR2 IL2 J BYI LF A GRD A BAT 8 GRD 8 BAT tiOV lro J J J l TO CONN 8LKS 3 4 AND 5 TO INTERRUPTER TO CONN BLKS 3 4 AND 5 TO 440A OR 4788 KTU AND 4568 KTU TO CONN BLK 3 TO CONN BLKS 3 4 AND 5 TO 424C KTU AND 4568 KTU TO INTERRUPTER TO POWER SUPPLY Fig 20 Condensed Functional Schemati...

Page 28: ...ITER J r II B rL_ NC OPT I ONS IS I NSTALLED AND DISCONNECTED WHEN 4788 KTU IS USED W ITH 570A OR BOA KSU CHANNEL F I LTERS STAR AND DETECTORS TRANSLATI ON AND ENABLE TIMING AND CONTROL MEMORY AND RELAY DR IVERS Fig 2 1 Condensed Functional Schematic of 4788 KTU TOUCH TONE Adapter Circuit P 0 CONN 814 Y1 830 Y2 829 Yl Y4 832 Y5 BH 826 RH CG 821 TO 424C KTU TO 460A 8 KTU TO 424C KTU Ill 0 z c c ...

Page 29: ...ECTION 5 1 8 450 1 00 832C 2832C MD Telephone Sets 2 41 The 832C telephone set is a rotary dial 13 button key telephone set The set has a lower row of ten buttons for 7 CO PBX line pickups 2 intercom line pickups and for hold The upper row contains 3 buttons on the left providing recall privacy release and optional ring transfer A brushed aluminum finished collar assembly with the words COM KEY in...

Page 30: ...ted and are blocked nonoperative 2 47 As shipped from the factory only two intercom buttons buttons two and three are wired operational as required for use with the 7A System Page 30 2 48 The intercom pickup buttons on the 575AM telephone set do not automatically restore to the nonoperated position when the handset is placed on hook 2575AM Telephone Set 2 49 The 2575AM telephone set is the same as...

Page 31: ... is in his best interest Has adequate light and is always accessible Has a wall providing adequate support and stability or floor space away from foot traffic and protected from vehicular traffic Has sufficient clearance above floor level to avoid damage from water or blows incidental to cleaning Is central to station locations to permit shortest cable runs Is clean dry well ventilated and free fr...

Page 32: ... An auxiliary paging system telephone company or customer provided will be required An auxiliary paging system requires the use of a 20A 49 apparatus unit ORDERING GUIDE a Apparatus for Basic Service Cable Connector A25B order one single ended cable per telephone set and console used length must be specified Mounting Apparatus 77B floor stand for 570A KSU order one per installation when KSU is to ...

Page 33: ...ease feature Kit of Parts D 180591 Recall order one for each 832A or 2832A telephone set used as a station equipped with the recall feature ISS 3 SECTION 5 1 8 450 1 00 Kit of Parts D 180656 Shelf Assembly order one for each 832 2832A B C BM or CM type telephone set to be wall mounted Loudspeaker Horn KS 16846 L2 order as required for outside paging Loudspeaker Indoor K8 order as required for indo...

Page 34: ...lephone Key 455A Tone Ringing Signal Generator Circuit Unit Telephone Key 456A or 456B Voice and Tone Alerting Circuit Unit Telephone Key 460B 2 Path Intercom Access Circuit Unit Power 19C3 Page 34 Unit Power 215C1 Unit Power 19C2 on earlier models of KSU 33A Voice Coupler Fuse 35P 3 4A 832 and 2832 Type Telephone Sets Refer to Section 503 701 110 575AM and 2575AM Telephone Sets Cord D20P 87 mount...

Page 35: ... 8 Terminate the station cables Cut down the A25B connector cables on connecting blocks 3 4 and 5 as shown in Fig 26 Intercom station code 0 attendant station is terminated on column G of connecting block 3 Intercom ISS 3 SECTION 5 1 8 450 1 00 station code 3 is terminated on column H of connecting block 3 and station codes 4 through 19 are terminated on columns A through H on connecting blocks 4 ...

Page 36: ... I 5 5 o o o 10 10 o o o o o o o o o o o o 15o o 15 o o o o o o o 2C o o o 0 o o o o o o 3Qo o o J 0 0 0 0 0 0 0 0 o 0 0 0 0 0 0 0 0 4 5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 o 0 0 0 0 0 0 0 0 5Q0 0 0 0 0 0 0 050 CONN BLK 4 Fig 26 Station Connections 12 13 14 IS 1 6 17 18 19 A B C D E f G H 1 1 o o o o 5 5 o o o o 10 0 o o o 15 o o 15 o o 2oo o o o C o o o o o O z5o o o o o 25 o o o o o o o o o o o o Oo...

Page 37: ...tellite is 175 feet and there will be four telephone sets working from ISS 3 SECTION 5 1 8 450 1 00 the satellite The number of additional cable conductors for lamp leads is calculated as follows 1 Maximum allowable distance for one telephone from the KSU 667 ft 2 Distance between satellite location and telephone set farthest from satellite 175 ft 3 Subtract 2 from 1 667 minus 175 492 ft 4 Maximum...

Page 38: ...2832 type telephone sets used with the 7A System When the handset is replaced Page 38 all depressed buttons return to the unoperated position This prevents inadvertent intrusion on calls in progress and insures that multiple buttons will not be left depressed on a set causing an undesired conference from the idle set 4 02 The intercom only telephone sets 575AM and 2575AM do not have ABR 4 03 On 83...

Page 39: ...etween terminals F9 and Cl Up to ten stations including the attendant can be wired f or common audi ble only if capacitor Cl is connected to fuse F1 2 as shown in Part E of Fig 73 If it is not only one station can have common a udible 2 Run a strap from the common audible terminal F9 to the CO PBX ring terminal or terminals in row C of the desired station or stations code Use a continuous strap if...

Page 40: ...ding common audible diode from connecting block 1 Fig 29 When a CO PBX is removed from the common audible ringing arrangement The CO PBX line must be connected to ring a selected station s via a CO ringing arrangement as described in 4 26 The ringing cannot be transferred through the ring transfer arrangement C Multiline Conferencing 4 10 Multiline conferencing is a feature of the telephone sets u...

Page 41: ...0 a single tone followed by voice signaling Voice signaling is used in conjunction with tone signaling when calling a station on the intercom When a station receives incoming CO PBX tone signals and is simultaneously signaled on the intercom the intercom signal is given preference F 2 Path Intercom 4 20 The intercom has two separate talking paths A path is selected by depressing one of the two int...

Page 42: ... CE STAT I ON 2 ONLY LEADS SHCMN ARE REQU IRED CUT OWN BALANCE OF CONN CABLE ON SAME COLUMN OF CONN BLOCK EXCEPT FOR lRO C PATH PLUG 40 1 5 41 1 6 42 17 4l 1 8 44 46 21 47 48 2l 49 50 25 JB 1 l l 9 NOTE 2 A25B CONN CABLE BK S S BK Y BL BL Y Y O 0 Y Y G G Y Y BR V BL BL V V 0 V G G V V BR V S S V BK G G BK BK BR Fig 30 Connections for Intercom Only Telephone Page 42 LEAD DESIGNATION I T1 I R1 I L1 ...

Page 43: ...ringing feature permits a station not wired for common audible to receive the ringing signal on a selected CO PBX line Any combination of stations may be connected for CO ringing on a one line per station basis Remember T he CO ringing is tone ringing 4 26 A terminal representing each CO PBX line is brought out on connecting block 1 row 21 see Fig 32 To connect CO ringing on connecting block 1 col...

Page 44: ...E STATION 3 TO RING ON LINE I AND STATION 16 TO RING ON LINE 2 Fig 32 Connections for CO PBX Ringing and have the capacity to adequately power the signaling devices The ac power receptacle should meet requirements per 3 02 Information found in Sections 167 416 201 167 440 201 or 167 446 101 may be used as a guide toward selecting an appropriate power supply Do not use a power supply that exceeds t...

Page 45: ... o l MAXIMUM RATINGS OF THE Kl RELAY 0 0 0 1 0 CONTACTS 0 o l 35 130 VOLTS I I 1 0 0 0 0 0 o o I 5 AMPS 0 0 0 1 2 25 VOLT AMPS 0 o o 0 0 0 1 3 0 o o t WHERE IT IS NECESSARY TO STACK 1 4 LEADS ON A TERMINAL USE 18382 0 0 0 0 o o ADAPTERS 0 0 0 1 5 o o 40 I FACTORY PROVIDED STRAP ON 1 5 0 0 0 1 6 o o I NSTALLERS SIDE OF CONN BLK 1 7 0 0 0 1 8 0 o o 1 9 0 0 0 0 o o 45 0 0 0 l 0 0 BAT o o RSI 0 0 24 c...

Page 46: ...WN IN PARENTHESIS u REPRESENT THE 7 CO PBX LINES E F G H fACTORY PROVIDED STRAP ON 0 C 0 I INSTALLERS SIDE or CONN BLK 0 C 0 t FACTORY PROVIDED COMMON AUDIBLE DIOOES FACTORY PROVIDED PRESET 0 C 0 2S CONFERENCE DIODES J WHERE IT IS NECESSARY TO STACK C 0 LEADS ON A TERMINAL USE 183B2 o o ADAPTERS OPTIONS C 0 C 0 0 COMMON AUDIBLE o o 30 CO RINGING CONNECT TO SELECTED CO PBX L1NE ON A ONE o o 22A 49 ...

Page 47: ...630I OUTLET FOR KS 16301 SIGNAL lt IB 48V oc Cl 0 1 COM 30 48V 60 HZ I SIGNAL lt I KS 16301 Ll6 AND Ll7 RELAYS 0 0 I NOT USE L16 9 TO 48V 60 HZ Ll7 12 TO 78 VOC RELAY COIL LZ0 1BV 60 HZ L 1 1r I Kl I KS 16301 LZOI I INDOOR OR I L _ _ _ o D R L_ 1 t lTO EXTERNAL PWER SUPPLY 5 I I GRD _j 0 _ lt LIST I 2 3 4 OR 5 NOTE THE 22A 49 APPARATUS UNIT MUST BE MOUNTED IN A VERTICAL UPRIGHT POSITION Fig 35 Con...

Page 48: ...pling only thus blocking all direct current to the input terminals of the 33A voice coupler Page 48 T he C P music source should be able to deliver up to 1 watt into an 8 ohm load The 33A voice coupler will accept input f rom any customer provided apparatus that does not blow the 4 38 fuses in the voice coupler If the customer wants a copy of the Technical Reference covering the 33A voice coupler ...

Page 49: ...coming CO PBX ringing from the attendant station code O to an alternate telephone or telephones in the 7A System Ring transfer can be wired for fixed station or as a flexible station arrangement With fixed station ring transfer incoming CO PBX calls are transferred to a specific station or group of stations as fixed by an option strap in the KSU The flexible station ring transfer arrangement utili...

Page 50: ...EM telephone set is installed as an attendant station the factory provided RING TR button must be wired in See Fig 39 for connections Where the 832A or 2832A telephone set is installed as an attendant station a D 180487 kit of parts must be added to the telephone set as follows 1 Remove faceplate 2 Pry apparatus blank off locating pins located below and to the right edge of key strip 3 Press ring ...

Page 51: ...ORMATION ON 6041G KEYS OPTIONS 0 FIXED STATION RING TRANSFER ANY STATION MAY BE SELECTED FOR RING TRANSFER TRANSFER TO STATI ON 12 IS SHOWN HERE FLEXIBLE STATION RING TRANSFER ANY ONE OF UP TO FIVE STATIONS MAY BE SELECTED fOR R I NG TRANSFER THROUGH 6041G KEY Fig 39 Connections for Ring Transfer 5 At the KSU terminate one conductor common lead on the RT terminal column F terminal according to the...

Page 52: ...angement c Connected to a separate paging system provided by the telephone company 4 46 For background music a 33A voice coupler must be installed and connected to the KSU and customer provided music source according to 4 38 b When the paging system is not being used the customer provided music source may be used to provide background music over the paging speakers Page 52 4 47 A paging system sho...

Page 53: ...the NOTES 1 EXAMPLES A B AND C ARE FOR QUIET OR OFFICE TYPE ENVI ROMENTS LESS THAN 6500 SOUND PRESSURE LEVEL SPL ALL SPEAKERS SHOULD BE LOCATED AT LEAST 60 FEET FROM AtfY STAT ION USED FOR PAG ING EXAMPLE A SPEAKERS LOCATED ON ON WALL OF ROOM NOTES I 2 AND 3 2 SPEAKER W I R I NG SHOULD BE RUN SEPARATELY 60 J k 30 1 1 30 lf 60 1r NOT PART OF A VOICE CABLE QUAD CABLE SHOULD BE USED WITH BOTH PAIRS C...

Page 54: ... which however may increase the tendency of the system to squeal because of feedback between loudspeakers and telephones If this occurs try to change the relative positions of loudspeakers and telephones if possible If a 456A voice and tone alerting circuit is used replace it with a 456B I j 10 15 0 o 62c 0 624 P 0 CONN BLK I J TO 1 ST PAGING SPEAKER J TO 2ND PAGING SPEAKER J TO 3RO PAGING SPEAKER...

Page 55: ...lume turn the potentiometer of the 20A 49 apparatus unit to the full clockwise position The 20A 49 apparatus unit provides a nominal 300 ohm output to a customer owned paging system It does not provide a means to activate the customer s equipment therefore the customer s e q uipment m us t be in the ON mode a t all times 4 Disconnect call If a service call is caused by a malf unction of the custom...

Page 56: ...g 46 for KTU location I Privacy 4 59 Privacy prevents a station from bridging into a CO PBX call in progress Privacy is a station feature and each station that is to be excluded locked out must be equipped with a privacy circuit board 4 60 A privacy circuit D 180486 kit of parts must be added to an 832 2832A B EM or DM telephone set used as a privacy station The Page 56 832 2832C CM and EM telepho...

Page 57: ... ION MAY P I CK UP O ILY ONE PO rt R rA I LURE L I NE USE INSIDE WIRE FOR RINGER CONNECTIONS CONNECT POWER FAILURE RINGER EIC BY ONE OF THE FOLLOWING METHODS FROM TEL SET TO RINGER LEAD TERMINAL TERMINAL DESI GNATION 20 5 ER 21 6 ET FROM A258 CABLE TO CONNECTOR RINGER LEAD USING TERMINAL DESIGNATION ADAPTER PIN 25 5 ER PIN 50 6 ET FROM CONN TO LEAD BLK 3 4 0R RINGER DESIGNATION 5 IN KSU TERMINAL T...

Page 58: ...acy release Refer to Table D for a summary of sets which are factory equipped with the privacy release feature 4 66 When a station is off hook with a CO PBX line button depressed any station equipped with a privacy circuit will be locked out from that CO PBX line To permit a privacy equipped station to bridge into a call 1 Depress and hold down the PRIV RLS button at the station where the CO PBX l...

Page 59: ...8 450 1 00 L Speakerphone 4 74 Normal speakerphone service may be provided at all stations in the system Connect speakerphone as follows Men installing a 3B or 4A s peakerphone in conjunction with a modular 832 or 2832 type telephone set determine if there is an orange 0 lead on terminal 27 of the telephone set terminal board If there is move it to terminal 22 Failure to m o ve this lead will caus...

Page 60: ...swer call using transmitter and loudspeaker operation to carry on conversation 4 79 To disable transmitter when it is desired not to transmit conversation from the surrounding area to the distant station 1 Depress transmitter ON button during entire period transmitter is to be disabled 1 Put line on hold 2 Hang up handset 3 Turn speakerphone on 4 Depress line button TABLE E Page 60 832 2832A B BM ...

Page 61: ...rminal 82 when privacy release is provided TABLE G 4 81 To transfer from speakerphone to handset ALL 832 2832 TYPE TELEPHONE SET CONNECTIONS TO DISABLE PRIVACY CIRCUIT operation lift handset during speakerphone operation to automatically transfer to handset operation When it is necessary to transfer back to speakerphone refer to 4 80 to prevent disconnect MOVE LEAD IN TEL SET COLOR FROM TERM TO TE...

Page 62: ...MOVE LEADS TO PRIVACY BOARD TERM 82t 82t 82 t If telephone set has privacy circuit and privacy release is now being added TABLE I 832A AND 2832A TELEPHONE SET CONNECTIONS TO REMOVE PRIVACY RELEASE BUTTON PRIVACY PRIVACY REMOVE MOVE LEADS TEL SET RELEASE FROM BOARD LEAD LEAD BUTTON TEL SET FROM PRIVACY TO TEL SET LEADS TERM BOARD TERM TERM 0 BK 10 BK BL 15 G Y 27 Y G 27 G W 2 82 BK 2 82 15 8t 82 15...

Page 63: ...n on the 6Al console an attendant may signal any station over the intercom or make announcements over the paging system The console also provides the attendant with a visual indication of a busy station Seventeen buttons on the console correspond to the station codes codes 3 through 19 one button is associated with paging one button is arranged for recall and one button is spare See Fig 48 for sch...

Page 64: ...d from terminal 27 on tel set terminal board to terminal 22 For rotary dial tel set t For TOUCH TONE tel set T7A R2FK BK 0 G Y 0 BK Y 0 BK S BL R S BK G R j Strap terminals 4 and 5 on control unit when used with TOUCH TONE tel sets Located on network Also remove W S lead from tel set amplifier terminal 1 and connect it to terminal 19 Connect W 0 lead to terminal 1 on tel set amplifier tt Speaker t...

Page 65: ...path and depress intercom button 3 Momentarily depress PAGE button on DSS console tone burst will be heard over paging system loudspeakers 4 Speak into handset transmitter to make announcement 5 Replace handset Station Busy Console 6B 1 With MW 4 89 By depressing the appropriate button on the 6B1 console an attendant may signal any station that there is a message waiting by lighting the lamp under...

Page 66: ..._ ___ o __ e ___ _ ___ _ o o __ 4 3 Ll G z 0 0 SPARE 11 4 3 LLG g z 0 PAGE 11 4 3 LLG I 11 4 3 LLG I _ 0 11 4 3 l LG 1 H 4 4 K J K5 5 6 11111 s nn J r N 2 1 lD 2 N N _ i f j l j f J J f f f J J t f J j f j l j f Jj J f l 0 Q I CD 1 1 1 1 r 1 1 1 I Ill J I ID I al O O e O f 0 8 i 9 e 2 g a g TO CONN BLOCK 3 Fig 48 6A 1 Station Busy Console Nith DSS Schematic Sheet 1 of 2 Page 66 ...

Page 67: ... 5 4 3 2 1 L l G 6 5 4 3 2 1 L LG 6 5 4 3 2 1 L LG 6 5 4 3 2 1 L LG 6 5 4 3 2 1 L L G 1 2 3 4 5 6 11 4 3 L l G J n 4 3 L l G 0 1 J 0 u _ 11 4 3 L l G i ii 11 11 4 3 L l G 4 3 L LG il il 0 _ _ i _ t _ 0 Fig 48 6A1 Station Busy Console Yfith DSS Schematic Sheet 2 of 2 S3 Page 67 ...

Page 68: ... z a C 11 4 3 L LG SPARE R 01 11 4 3 L LG r1 9 a z a m z a m 11 4 3 L LG R SI 11 4 3 L LG a g 1 vl 11 4 3 LLG BK GI 1 4 3 L LG l 9 e bJl d L l S3m J f J m m m r tt 1 1t l t w t W t 1 wrt 1 m wt t mJ f f mwwmrrmwW r lfWt tr f t m ili rt m mmm rJ t r t t t r m W t r m tg t t t tntt t n wt t Fig 49 681 Station Busy Console With MW Schematic Sheet 1 of 2 Page 68 l ...

Page 69: ...11 4 3 l LG SR VI V Ol 11 4 3 L LG i 9 0 o 0 _J _J _ 11 4 3 L LG G V V SI 11 3 4 3 L LG rr ISS 3 SECTION 5 1 8 450 1 00 0 _J 0 S4 11 4 3 L LG SKI G 0 YI Y SI 11 4 3 L LG I BK 8 S2 G SKI Fig 49 681 Station Busy Console With MW Schematic Sheet 2 of 2 Page 69 ...

Page 70: ...a u tion Make s ure bare leads of the diode do not come into contact with the case of the network other network terminals or other parts of the telephone set Use insula ting sleeving where required Page 70 0 TOUCH TONE Dialing 4 95 Where TOUCH TONE dial telephone sets are used with the 7A System a 440A MD or 487B KTU TOUCH TONE adapter is required These are the only TOUCH TONE adapters usable in t...

Page 71: ... One DSS Console TOSTATIONBUSY CONSOLEIllTH MESSAGE IIA I TING ISS 3 SECTION 5 1 8 450 1 00 A25BCONNCABLE COLOR LEADDESI G 11 BL SBI D E r G H 0 o ol BL 11 SB2 0 11 0 SB3 0 11 SB4 0 o o 11 G SB5 0 G Il SB6 0 5 11 BR SB7 0 BR 11 SB8 0 11 S S89 0 o o S 11 S810 0 o o R 8L 0 10 SB 1 0 BL R S812 S813 0 o o R ol 0 lo R SBI4 R G SBI5 0 0 o o1s G R SBI6 0 R BR SBI7 0 o o 8R R S818 R S SBI9 0 o o 0 S R 18V...

Page 72: ...17 V 0 K 1 8 D V K 119 V G 10V G V ov lV B R BR V 10V v s 10V S V 10V 1BGA WIRE o o o o 0 0 0 0 0 0 0 0 0 0 i 40 o o 0 o o 0 0 0 o 45 0 o o 0 0 o o 0 o o 0 50 CONNECT EXTERNAL 18V IF KSU IS NOT EQUIPPED REMOVE STRAPS 01 B GRO B GRO B G R O B GRO B Gll o B GRO TTG TTG TTG TTG LT2 LK CGI CGO Y1 Y2 Yl Y4 Y5 B BAT B BAT B BAT B BAT 2A POWER SOURCE ONLY WITH 215C1 POWER UNIT CONNECT GROUND CIRCU IT TO ...

Page 73: ...if l CG I S Y CGO V 8L 1 NO ES IF KSU IS LEADS AS EQUI PPED WITH 2 1 5C I POWER UNIT CONNECT THESE SHOWN I F NOT D ISCONNECT I NSULATE AND STORE TI lEN CONNECT EXTERNAL IBV 2A SOURCE TO COLUMN D AS SHOWN BELOW AND STRAP ROWS 20 THROUGH 25 CONNECT E IS NOT EQU XTERNAL t IBV 2A POWER SOURCE DNLY I F KSU I PPED WITH 2 1 5C I POWER UNIT DISCONNECT IN KSU CABLE FROM BLOCK I NSULATE AND RAP ROWS 20 THRO...

Page 74: ...N CABLE TO FIRST iWr OOw N SAME N A MW CONSOLE COLORS AS COLUM A25B CONN CABlE CUT D COLORS TO SECOND MW CONSOLE OWN SAME N A AS COLUM 1B IRE I BV CONNECT EXTERNAL 1BV POWER SOURCE ONLY IF KSU IS NOT EQUIPPED W I TH 215C1 POWER UN IT DISCONNECT t1BV LEADS IN CABLE FROM KSU I NSULATE AND STORE STRAP ROWS 20 THROUGH 25 IN COLUMN A CONNECT EXTERNAL GROUND C I RCU IT TO 1BV GRD TERMI NAL ON KSU POWER ...

Page 75: ...SR OK SK i 5 0K Y BL BL Y Y l 0 Y Y G G Y Y BR BR y Y S 5 Y BL V V l 0 V V 0 G V V BR BR V V S S V I CUT DOWN CABLE FROM FiRST OSS CONSOLE ON COLUMN B EXCEPT FOR CGO V BL LEAD 2 CUT DOWN CABLE FROM SECOND OSS CONSOLE ON COLUMN C EXCEPT OR CGI S Y AND CGO V BL LEADS LEAD DfS I G 56 1 582 SB 564 585 566 567 588 SB9 SBID SB I I SBI2 san SBI4 SB I 5 5816 SBI7 SBIB SB19 IBV I BV IBV I BV I BV t I BV t ...

Page 76: ...0 50 P 0 CONN BLK 3i ON KSU I I I I I I I I I I I I CUT DOWN ON COLUMN 0 CONN BLOCK 3i ON KSU I L _ D INSIDE W I R I NG CABLE LEAD COLOR DEStG W ll 581 BL SB2 W J SBl 0 SB4 W G SB5 G SB6 W lR SB7 BR SBB W S SB9 S SBIO R ll SB I I Bl R SB I 2 R J 58 1 l O R SBI4 R G SBI 5 G R 58 1 6 R lR SBI7 BR R S818 R S SBI9 S R 18V BK ll I BV Bl aK I BV t BK J IBV 0 K I BV BK G IBV G lK 1411 BK 8R 1412 BR 1 K 1...

Page 77: ...1 9C TYPE OR 2 1 5C I SECOND AND THIRD OSS CONSOLES GET I BV POWER BY INSTALLER CONNECT ION TO 2 1 5C I OR AN EQU IVALENT EXTERNAL SUPPLY AS SHOWN BELOW INSTALL 1B B2 ON CL I PS 20 2 BRI DG I NG ADAPTERS AND STRAPS 5 IN COLUMN C INSTALL 1B B2 FOR POWER CON BRI DG I NG ADAPTER NECTI ON v1BGA W I RE CONNECT t1BV 2A POWER SOURCE CONNECT GROUND C I RCU IT TO 1BV GRD TERMI NAL ON KSU POWER UN IT WITH 1...

Page 78: ...WS 1 19 AND 26 50 BE SURE THAT FACTORY PROV IDED STRAPS BETWEEN E26 AND E27 AND E40 AND E41 ON CONN BLOCK 3 ON KSU ARE I N PLACE v I NSTALL 1 83 ON CLIPS 20 v I NSTALL 183 FOR POWER C V 18V 18GA IRE A25B CONN _J E _ _ CUT DOWN COLORS SAME AS COLUMN A A25B CONN CABLE CUT DOWN COLORS SAME AS COLUMN A A25B CONN CABLE CUT DOWN COLORS SAME AS COLUMN A F I RST MW CONSOLE RECEIVES 18V POWER FROM KSU POWE...

Page 79: ...onsidered ISS 3 SECTION 5 1 8 450 1 00 5 04 Check as follows 570A KSU Fuses in place and not blown Lamps not burnt out KTUs securely mounted in proper connectors with retainers and or guide asemblies in place Check wiring on connecting blocks EXTERNALLY MOUNTED UNITS A 33A Voice Coupler Fuses not blown and positioned properly COAM music source operative and meets requirements in 4 37 B 20A 49 Appa...

Page 80: ...formation for the following circuits is provided CO PBX line circuits 400 Type KTU CO PBX line ringing arrangements Power failure transfer circuit 452A KTU Intercom circuits 424B or C 440A MD or 478B 456A or B 460B KTUs Paging circuit 457C KTU Background Music Music On Hold 451A or B KTU Power distribution 6 03 If analysis and or testing indicates trouble in the KSU the source can be further ident...

Page 81: ...ead CO PBX lines can ring at additional stations other than the attendant by connecting the RC leads to the CO leads option S ISS 3 SECTION 5 1 8 450 1 00 Calls can be transferred to one alternate station other than the attendant by adding option J on block 1 Note In any of the arrangements a maximum of 10 stations can be wired to ring on common audible However a station cannot ring on more than o...

Page 82: ...t of tone as the alerting tone on intercom calls The preamplifier is used for the voice signaling A voice input to the paging circuit optional is also furnished from this circuit D 2 Path Access Circuit 460B KTU 6 14 The 460B KTU performs the following functions Page 82 Provides talk battery for the two intercom paths Controls all intercom lamp functions Provides the common control circuitry to co...

Page 83: ...k condition the output of the 451A or B KTU is shorted by contacts in the associated line circuit When placed on hold the output is impressed on the ring side of the CO PBX line and can be heard by the held party ISS 3 SECTION 5 1 8 450 1 00 6 20 Tables AG AH AI AJ and Fig 72 are provided as an aid in the maintenance of background music and music on hold circuits POWER DISTRIBUTION 6 21 Refer to F...

Page 84: ...ty of in the set tip and ring may be dial restriction diode reversed Line busied out a Lamp and A leads reversed Check station cutdown for that line lamp steady b Lamp and A leads shorted Check station cutdown for that line Dial tone over an a Two lines conferenced from an Check stations to ensure that no idle sets answered call or idle station set have more than one line button depressed two line...

Page 85: ...erly modified 3 13 is always lit a 451A 451B KTU is not plugged in Check that KTU is properly seated in con properly nectar and is located in the right con nectar See Fig 6 and 37 No music on hold or b Music source volume too low Gradually increase volume while listening distorted See 4 37 music on c Music source unable to drive the Source must be approx 8 ohms or less hold 451A KTU d Blown fuse o...

Page 86: ...r turned too low a 457C KTU is not plugged in Check that KTU is properly seated and correctly is in right connector See Fig 6 and 42 b Potentiometer in 20A 49 Adjust potentiometer apparatus unit turned too low c Customer s paging system turned Proceed as follows off 1 Test for hazardous voltages at Cannot transmit over or terminals Al and A2 of 20A 49 COAM paging apparatus unit system Trouble in C...

Page 87: ...ard or ringback code Request callback Go on hook Lamp extinguished Go off hook Line button depressed ISS 3 SECTION S 1 8 450 1 00 FAI LURE I a Lamp lights no dial tone 1 Wrong line connections 2 Defective telephone set b Dial tone no lamp 1 No Al ground 2 Defective telephone set 3 Open lamp or lamp lead 4 A and or C relay not operated 5 No lamp or relay battery FAILURE I 1 L and or B relay not ope...

Page 88: ...etermines idle off hook or hold indication Lamp lead provides proper 10V ac signal to tele phone set lamp to indicate line status Ring side of CO PBX line from office Ring side of line output toward station Tip side of CO PBX line from office Tip side of line output of KTU toward station FAILURE I 1 Relay L B and or C not operated 2 Defective tel set FAI LURE l Holding bridge not applied to line C...

Page 89: ...ALK B Ground B BAT r 6 MG interrupter ground 2 LW 10V at 120 IPM r With interrupter running 7 LF 10V at 60 IPM GROUND r MON or 4 10V steady 1 5 r 11 RN interrupted tone ringer signal 17 TALK B Battery Interrupter running OUTPUTS 12 13 TALK CO PBX dial tone 8 10V steady Ground pin 16 GROUND r MON 1 Tone ringing signal CO PBX ringing on line Page 89 ...

Page 90: ...1 CO R l CO Tl 0 T l 3 T l 4 1 1 Tl 12 18 R I 0 Rl 3 R l 4 1 1 R I 12 18 IA 4 1 1 CONNECTING BLOCKS I I Fig 61 First Line Circuit J2 16 KSU CONNECTOR J I J l 8 WIRING ON KSUs MANUFACTURED 1975 5 i5 z 0 0 ...

Page 91: ...A HI I I II i ll f II II l n I lilt Btl ii 9 gJ Mill Fig 62 Second Line Circuit I I I Y 1 l l I W J M f 1 1 1 m ti H NOTE IJ J3 f 1 4 II J I B REPRESENTS WIRING ON KSUs MANUFACTURED BEFORE MAY 1975 iii _ 0 z i 0 0 ...

Page 92: ...Fig 63 Third Line Circuit NOTE KSU CONNECTOR JI REPRESENTS WIRING ON KSUs MANUFACTURED BEFORE MAY 197 Ill m n 0 z 0 0 ...

Page 93: ... 0 R4 3 R4 4 11 148 lJi _ _ _ _ ____ _ _ _ _ 14 8 1 A H I R4 12 18 A H 4 I 14H I L4 0 I I tt r 15H _ r 1 L4 3 _ _ _ _____ _ q__ _ _ _ L4 4 1 I 158 f m tl I l A Hl A Hl 4A 0 4A 3 4A 4 1 1 4A 12 18 168 c T A H t6s 1 A H k l j I 13f 1 6f 16H 13H I I I I I s I Fig 64 Fourth Line Circuit II f4 L4 J ffi I I I 16 I ffit H ili m NOTE REPRESENTS WIRING ON KSUs MANUFACTURED BEFORE MAY 1975 _ m n 0 z 00 c I ...

Page 94: ...ll tM Fig 65 Fifth Line Circuit J I S 16 NOTE REPRESENTS WIRING ON KSUs MANUFACTURED BEFORE MAY 1975 VI 0 z U1 ClO J U1 0 0 ...

Page 95: ... 1 218 tl A H Iilll g I I 12 13 I L_ _ _ _ _ 34 l OJ_ _ 3l_ j j I 1 J i __ k l t 228 R A H 8l_ w 228 w I I I 248 J ti A H _ __ ___j 82 _b 24 0 8 i J A Hl Fig 66 Sixth Line Circuit 12 I II jj 1 3 I I I l t i l t i t 1 I I J i W H M N I n ill I J a P J it W f I r 1 I NOTE REPRESENTS WIRING ON KSUs MANUFACTURED BEFORE 1975 iii _ m n 5 z CD J 0 0 ...

Page 96: ...Fig 67 Seventh Line Circuit JIB NOTE REPRESENTS WIRING ON KSUs MANUFACTURED BEFORE MAY 1975 m n 4 5 z Ill 00 J Ill 0 0 ...

Page 97: ... on block 1 row 24 to column C 2 Open CO lead 3 Defective tel set amplifier and or loudspeaker at attendant station 0 Flexible ring transfer only button operated on 6041G key for selected alternate station FAILURE I CO PBX ringing heard at alternate station removed from attendant station 1 Strap missing o n block 1 from RT terminal 24F to column C See Fig 39 OK I CO PBX ringing returned to attenda...

Page 98: ... KTU interrupter RN lead 400 type KTU RC lead common audible diodes and cross connect on block 1 Ring transfer this lead transfers common audible RT ringing from CO O lead to designated alternate station under control of RING TR button at attendant set and jumper at block 1 option J RC Ringing control tone ringing output from 400 type KTU to common audible diodes on block 1 Page 98 ...

Page 99: ...NOTES I PLACE STRAP FROM 24F TO DESIRED TERMI NAL IN COLUMN C FOR RING TRANSFER STATION OPT IOM 0 SEE FIG 39 2 TO ARIU NGE CO llt i NCi i N AT STATIONS IN ADD I T I ON TO THE ATTENDANT OPT IOM CROSS CONNECT FROM OW 21 TO PROPER TERMINALS IN COLUMN C SEE F I G 32 3 FACTORY PROY IOED STRAP WICH PROV I DES C AUOI BLE R I NGING AT STAT I ON 0 OPTION Fig 68 CO Ringing Arrangement iii _ w m n 0 z ...

Page 100: ...UIT 452A KTU CO PBX ringing on line under test Disconnect commercial power or remove B SIG at power unit CO PBX ringing on line FAI LURE I 1 No commercial power to KSU 2 No battery and or ground to 452A KTU B SIG fuse on 19C type power unit 3 Defective 452A KTU FAILURE I 1 Defective 452A KTU 2 Improper connections at block 1 3 Ringer connected improperly or defective ...

Page 101: ...36 14 T CO Tip side of CO PBX line from office 0 20 24 38 32 12 39 R CO Ring side of CO PBX line from office 19 21 25 34 23 13 30 TABLE W I NPUTS AND OUTPUTS 452A KTU TEST TO MON TALK TEST FOR REMARKS FROM SWITCH INPUTS GROUND 17 TALK B Battery 17 9 B Ground OUTPUTS 1 31 CO PBX ringing Line 1 16 26 CO PBX ringing Line 2 28 29 CO PBX ringing Line 3 Power plug disconnected MON CO PBX ringing Line 4 ...

Page 102: ...o 1 9D 9 200 T5 CO R5 CO EXT 5 EXR 5 T6 CO R6 CO EXT 6 EXR 6 T7 CO R7 CO EXT 7 EXR 7 NOTE CONN BLOCK KSU CONNECTOR J6 1 4 1 9E 9 ZOE I l A J7 f 14 48A i 1 l o B r 1 9r ___ 9 ZDr _ _ JL _A_ ii 1r Ja 50 A ff i 4 1 4 tr o iii i ii 1 9G 9 iii r 1 4 ZOG EXT AND EXR LEADS MUST BE CONNECTED TO DESIRED STATION AT BLOCK I SEE r i G 45 Fig 69 Power Failure Transfer Circuit m n 0 z 0 J C 0 0 ...

Page 103: ... a No lamp 1 IT and or IR of selected path open 460B KTU 2 Open A battery fuse power unit 3 Open lamp fuse F13 or F14 4 Interrupter not running MS and MG leads 460B b No dial tone 1 Defective dial tone generator 460B 2 Selector not seized DO Dl leads 424B 424C 460B DSS console 3 Open BR lead 424B 424C 460B 4 IT and or IR open 460B If 2 digit ood 2 digit IC II Single digit code FAILURE a Dial tone ...

Page 104: ...ne burst 1 Open BY1 lead 424B 424C 456B 460B 2 Defective voice and tone alerting circuit 456B 3 Open SS lead 456B 424B 424C 4 Open VS lead 424B 424C 5 Defective tel set amplifier called station d Lamp continues to flash 1 Open BY1 lead 424B 424C 460B 2 Defective 2nd station detect circuit 460B 3 Selector not released FAILURE I a No voice conversation 1 IT and or IR lead open called station 460B 2 ...

Page 105: ...4C 440A or 478B 460B DSS console b Selector not reset 1 Open TD lead 424B 424C 2 Defective selector 424B 424C c Tone burst beard 1 Open RH lead 424B 424C 460B FAILURE I a Wrong station alerted 1 TR TRl relays not operated 424B 424C b No tone burst 1 Open BY1 lead 424B 424C 456B 460B 2 Defective 456B 3 Open SS lead 456B 4 Open VS lead 424B 424C 5 Defective tel set called station c Lamp continues to...

Page 106: ...KTU M option or to DO output of 460B via DSS console Q option If call is rotary dialed Dl is also the dial pulse input from the 460B Dialing output ground supply for talk battery when a path is seized also the seizure input for the 424B 424C selector by way of lead Dl if DSS is not provided M option or if provided Q option by way of the DSS console Intercom lamp 1 lamp circuit for path 1 to statio...

Page 107: ...erting circuit and to TOUCH TONE adapter R relay hold ground from LK lead is applied on this lead to 424B 424C KTU to prevent ringing until all dialing is completed Reset provides ground for 424B 424C KTU selector timer over RS2 lead If TOUCH TONE is provided N option furnishes ground to the counting relays via the adapter Reset connected to RSl see above Station signaling input when dialing is co...

Page 108: ...e signaling lead code 5 Station ringing voice signaling lead code 6 Station ringing voice signaling lead code 7 Station ringing voice signaling lead code 8 Station ringing voice signaling lead code 9 Station ringing voice signaling lead code 10 Station ringing voice signaling lead code 11 Station ringing voice signaling lead code 12 Station ringing voice signaling lead code 13 Station ringing voic...

Page 109: ...d code 19 J9 9 Y1 Selector counter relay No 1 ground provides ground to operate Y1 counting relay from J10 25 TOUCH TONE adapter of DSS console J14 14 Y2 Same as above except for Y2 relay J10 24 J14 30 Y3 Same as above except for Y3 relay J10 22 J14 29 Y4 Same as above except for Y4 relay J9 36 J14 32 Y5 Same as above except for Y5 relay J9 37 J14 33 iii _ m n 5 z D co D 1 Q 0 0 o 0 ...

Page 110: ...0 3 A Ground OUTPUTS 1 sec tone burst on VS lead of Tone burst heard after GROUND VS lead MON station tested See Fig 70 for VS dialing proper digit s lead assignment Jl0 19 Ground BYl lead Dialing complete 1 or 2 digit code B BAT After dialing 1st digit Jl0 30 TALK Ground LK lead dial tone should be removed Jl0 39 Ground TTG lead Selector seized GROUND Jl0 35 B BAT BR lead Selector seized Page 1 1...

Page 111: ...lead Selector seized TABLE AB INPUTS AND OUTPUTS 4568 KTU TEST TO MON TALK TEST FOR REMARKS FROM SWITCH INPUTS GROUND Jl6 18 A Battery Jl6 18 Jl6 3 A Ground Jl6 8 Jl6 9 TALK Talk Battery from 460B KTU Any intercom path TC and RC leads seized Ground from 424B 424C KTU Jl6 18 Jl6 19 BYl lead after dialing is completed on any path OUTPUTS Jl6 8 Jl6 9 Tone burst after dialing Any code dialed any path ...

Page 112: ...lead Selector seized TABLE AB INPUTS AND OUTPUTS 4568 KTU TEST TO MON TALK TEST FOR REMARKS FROM SWITCH INPUTS GROUND J16 18 A Battery J16 18 J16 3 A Ground J16 8 J16 9 TALK Talk Battery from 460B KTU Any intercom path TC and RC leads seized Ground from 424B 424C KTU J16 18 Jl6 19 BY1 lead after dialing is completed on any path OUTPUTS J16 8 J16 9 Tone burst after dialing Any code dialed any path ...

Page 113: ... paths 1 and 2 J12 35 TALK B Battery Selector seized J12 7 MON 10V at 60 IPM lamp flash Interrupter running Jll 3 A Ground Jll 17 Jll 15 TALK B Ground Jll 6 Ground MG lead OUTPUTS J12 14 J12 34 Talk Battery path 1 TALK Selector seized J12 0 J12 1 Talk Battery path 2 J12 8 Intercom path 1 seized J12 9 GROUND MON 10V at 60 IPM Jll 16 Intercom path 2 seized I Jll 19 J12 12 J12 13 TALK Talk BAT TC and...

Page 114: ...8 IR I 0 IRI 3 lR I 4 1 1 IR I 1 2 1 8 Ill 4 1 1 IT2 3 IT2 4 1 1 IT2 1 2 J 8 IR2 0 IR2 _ IR2 4 I I IR2 1 2 1 8 CONNECT lNG BLOCK KSU CC NECTOR J9 J 10 J l l J 1 2 Fig 70 lntercom Circuit Sheet 1 of 4 J 1 4 I I 1 m n 0 z U1 1 J 1 6 U1 0 0 ...

Page 115: ... 35B A H CONNECT NG BLOCK 4 3 4 35 A Hl E 43E 4_ 4E 4_ E E 38E 2_6E lm KSU CONNECTOR I J9 JIO Jll J12 J14 J16 14 L 16 19 l 14 l 30 1 29 l 32 1 33 39 16 r BYI t l 26 iii _ 1 9 m n 0 z 00 Fig 70 lntercom Circuit Sheet 2 of 4 _f 0 0 ...

Page 116: ..._ I_ 2 _4_A_ t t l j t ti 1 fi J i f ffi ffi 21 t t m b fin u c u r 21 _31E l l I 34 25 l i t 26 20 f l 21 I 32 11 30 29 k 14 i 4ZG I Ji 10 I 0 200 I 300 40 3 0 m w I 50 0 I W ffi 60 l j 0 k b 70 0 f t t J W 80 j 90 ili J i 1 00 Kif 0 1 o R l 39 Fig 70 lntercom Circuit Sheet 3 of 4 J 1 5 J 1 6 V m 0 0 z ...

Page 117: ...1 0 22 o 0 24 o 1 0 27 I C 111 0 B r 33 1 0 4 3 1 1 8 0 Fig 70 lntercom Circuit Sheet 4 of 4 J1 0 KSU CONNECTOR J 1 2 J l 4 JIS Il lTHOUT OSS CD PRESET CONFERENCE 0 IllTHOUT PRESET DNFERENCE I J 16 iii _ t 0 z 0 0 ...

Page 118: ...LURE Background music if provided removed from speakers One second tone burst heard in paging speakers OK I Announcement heard in speakers Page 1 1 8 Paging station talks in handset 1 Defective selector 2 Open SS lead 424B 424C 456B 3 Open PC lead 424B 424C 4 Defective 457C 5 Open PA lead 456B 457C 6 Volume improperly set see 4 50 4 52 FAILURE I 1 Open PA leads 456B 457C 2 Defective 457C 3 Volume ...

Page 119: ...enable amplifier PO Pl Paging amplifier output outputs Jl5 0 from paging amplifier to speakers Jl5 l TABLE AF INPUTS AND OUTPUTS 457C KTU TEST TO MON TALK TEST FOR REMARKS FROM SWITCH INPUTS Jl5 18 A Battery GROUND Jl5 17 B Battery TALK J15 17 Jl5 15 B Ground GROUND Jl5 19 A Battery PC lead Code 2 dialed Jl5 8 Jl5 9 MON Background music If provided OUTPUTS J15 0 Code 2 dialed voice input GROUND MO...

Page 120: ...3 fm i M i f I I I hi t I 1 I 11 tm t II nw t l Ill I I illH1 f it II s f f 3 m 8 I w tli 1 fl J HH W d t Fig 7 1 Paging Connections KSU CONNECTOR J 14 v J l 5 I J 1 6 TC 1 2 I RC I i Jli 1 3 1 I IcIn PC I I 3 9 1 9 iii iii I I 11 I 1 r i I t l t 1 tl B GRD lliJ l I 4 II I I II I w B GRD m J N t ...

Page 121: ...Paging circuit idle Paging code dialed ISS 3 SECTION 518 450 100 FAI LURE 1 COAM music source defective connected wrong or volume set improperly 2 Defective 33A coupler fuses operated or volume set improperly 3 Open PT and or PR leads 33A 457C 4 Defective 457C FAILURE I Refer to sequence on paging Page 1 2 1 ...

Page 122: ... progress on CO PBX line I Hold button depressed at 7A station Line button depressed FAILURE a Line circuit troubles refer to sequence on line circuits b No background music 1 COAM music source defective wrong connections or improperly set volume 2 Defective 33A coupler or fuses operated 3 Open MT and or MR lead 33A 4518 4 Open R CO or R STA FAI LURE I 1 Defective tel set 2 Defective line circuit ...

Page 123: ...line toward station TABLE AJ INPUTS AND OUTPUTS 451A KTU TEST TO MON TALK TEST FOR FROM SWITCH REMARKS INPUTS J18 35 J18 36 MON Background music input Music source connected OUTPUTS J18 19 J18 20 Background music output CO PBX line 1 on hold J18 39 J18 30 Background music output CO PBX line 2 on hold J18 24 J18 25 Background music output CO PBX line 3 on hold J18 14 J18 9 MON Background music outp...

Page 124: ...NECTOR COHNECTING BLOCK I t r 1 i i I I I I lli 9G PI rl r i l ffii r f r t 1 1 I 1 _ 1 _ I II f II m i jt H t Il i tM Mil I I l i_ P I 1 31 1 II 0 m tt MH m I 4 sw I IJI m II ill mt ME 11 1 8 PAGING BACKGROUND MUSIC Fig 72 Music On Hold And Background Music ...

Page 125: ... FUSE PANEL J 1 5 KSU CONNECTORS I JII 6 3 2 3 il I Jl5 JIO 4 1 G l KSU WIRED FOR 440A KTU M KSU WIRED FOR 4788 KTU B A GROUND 41H 41H Fig 73 Power Distribution Sheet 1 of 6 ISS 3 SECTION 51 8 450 1 00 CONNECTING BLOCKS 4 1 8 418 4 1 8 4 1 8 Page 1 25 ...

Page 126: ...SECTION 518 450 100 Page 1 26 1 7 J 6 17 J 1 2 1 7 1 7 C 24V 8 BATTERY 47E 46E Fig 73 Power Distribution Sheet 2 of 6 488 488 ...

Page 127: ...ANEL if i J 15 KSU CONNECTORS 15 4 J 1 3 15 I I J l 4 15 I I WIRlNG INSTALLED FORI I USE OF 4788 KTU I LI T D F__ A _j D B GROUND Fig 73 Power Distribution Sheet 3 of 6 ISS 3 SECTION 518 450 100 CONNECTING BLOCKS 378 378 458 458 Page 1 2 7 ...

Page 128: ...5CI ARE CONNECTED EXTERNALLY Page 128 J 1 9 1 0 IT l J l 9 J 6 1 3 I E 24C BATTERY CONNECT I NG BLOCKS BEFORE JULY 1 975 C 1 1 WAS CONNECTED TO R l 2 I NSTEAD OF F I Z 8 25E 24E 23E ZOE 2 1 E 22 lzso 24D 23o 200 2 1 0 22 F I BV AC LAMP BATTERY G I OV AC LAMP BATTERY Fig 73 Power Distribution Sheet 4 of 6 ...

Page 129: ...I I I J12 KSU CONNECTORS H LAMP GROUND ICI IC2 I I INTERCOM LAMPS J8 r b 65 I J4 15 6 I J2 31G 35G J MI SCELLANEOUS GROUNDS 31H 35H Fig 73 Power Distribution Sheet 5 of 6 ISS 3 SECTION 51 8 450 1 00 CONNECTING BLOCKS 328 I 318 3 1 8 358 358 Page 1 29 ...

Page 130: ...C2 3 PWER SUPPLY Page 1 30 1 30 Pages rusE PANEL ff Jl9 J 19 r 3 5 KSU CONNECTOil J8 J8 LW Lr J5 LF K STAT ION LAMP FUNCTIONS J l l I J3 5 I J5 L MOTOfl START MS LEAO Fig 73 Power Distribution Sheet 6 of 6 CONNECT ING BLOCKs ...

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