Page 1: Table Of Contents
F lexible Dial Conferencing DESCRIPTION Do-Not-Disturb SYSTEM Coli Forwarding The 6B KTS is a fully electronic intercom 2.01 which has a capacity of 4 separate talking Coli Forwarding-Do-Not-Disturb Up to eight paths (links) and 52 station codes.
Page 2 Remote Answer-permits user at one station 184Cl backboard has been developed as a terminal to intercept and answer a call intended for field for the 6B KTS, or existing blocks in the a second station. yellow field of a centralized key system can be used.
Page 4 SECTION 5 1 8-41 1 - 1 00 TABLE B CALL PROGRESS TONES REMARKS TONE SIGNAL HEARD Intercom Dial 128 Hz continuous Time (IDT) Intercom 256 Hz interrupted; If any station is equipped Audible 1 second on, 3 with a 2A HF AI unit, IAR Ringback (IAR) seconds off consists of a single spurt...
Page 5 SECTION 518-411-100 TABLE C FUSE ASSIGNMENTS- 572A1 KSU LOCATION FUSE TYPE CAPACITY FUNCTION 10Vac- Station 10-13 10Vac- Station 14-17 10V ac- Station 18-21 10V ac- Station 22-25 10V ac- Station 26-29 10Vac- Station 30-33 10V ac - Station 34-37 Ampere KS-21651, L4 10Vac - Station 38-41 Fuse...
Page 6: 572A1 Ksu
SECTION 518-4 1 1 - 1 00 J 1 0 J 1 1 J 1 2 J 1 3 J 1 4 J 1 7 J 1 9A J21A J23A J25A .."' "' "' "' "' ,..._ ....
Page 7 Refer to Table B for an outline of the tones used • Interfaces the control signals from the line in the 6B KTS. The 486A KTU is installed in J3. and station circuits to the controller 487A KTU- Battery Feed Circuit •...
Page 8: Backboard
184Cl backboard. Tip and ring of the CO/PBX functions: lines (from ahead of the line circuit) are fed through a separate cable to P13 on the KSU. • Isolate the 6B KTS from CO/PBX line potentials INSTALLATION • Detect and acknowledge supervisory signals...
Page 9 The 150A designation strip and 74A Note: faceplate can be ordered separately for Note: The 6B KTS requires a maximum of maintenance purposes. 0.35 ampere at 24V de and 0.17 ampere at 10V ac for the first 6 stations plus 0.04 Optional Features ampere for each additional station.
Page 10: 572A1 Ksu
Diode, 518A-surge protection for off-premises field; or a 184C1 backboard, which was designed station. Order two per station. for use with the 6B KTS, can be used. If the 184C1 backboard is used, these connector cables If 6B KTS system has off-premises...
Page 11: Key Telephone Units
The set ringer cannot be used as the 6B KTS audible signal. 10-15 feet use 14 gauge The telephone sets used with the 6B KTS 3. 1 1 15-25 feet use 12 gauge must be modified to connect the normally...
Page 12 SECTION 518-411·100 TABLE E 572A1 KSU PLUG AND 184C1 B A C KBOARD CONNECTOR ASSIGNMEN TS 184C1 BACKBOARD PLUG ON LEADS INVOLVED 572A1 KSU BLOCK A BLOCK C BLOCK B Not Used Conn. 2 Stations 10 · Conn. 3 Stations 15 ·...
Page 13 ISS 1, SECTION 5 1 8-4 1 1 - 1 00 565HK� TELEPHONE SET 2565HK� TELEPHONE SET ( G ) ( G ) (8R ) (Y-8R) (8R ) L 1 C/r (NOTE 1 ) L 1 (.1}' ( '- S ..:. .. ) ( NOTE 1 ) (0-W) ( O-W)
Page 14 SECTION 5 1 8-4 1 1 - 1 00 830 , 2830, 83 1 , 2831 TELEPHONE SETS (G ) (W ) (BK-BL) (G-W) (NOTES 3 AND 4 ) ( 0-BK ) (Y-O) ( BR ) (S ) 29 ,.,. ( O-W) ( BR- V ) ( BL )
Page 15: Off-Premises Extensions
ISS 1 , SECTION 5 1 8-4 1 1 - 1 00 DSAL OR S35A TELEPHONE SET OSA,., CONN BLK ( NOTES 1 AND 2 ) CORD ( G ) ( G ) � � ( R ) ( G ) ( W ) ( R ) �...
Page 16 SECTION 5 1 8-4 1 1 - 1 00 150A DESIGNATION STRIP 74A FACEPLATE Fig. 5-Appl i cation of 1 50 Designation Strip and 74A Faceplate Page 1 6 BSP 518-411-100-i01 1978-08-16.jpg Scanned b y Fra n k Harrell, (Cowboy Frank) Castle Rock, Colorado Oct 15, 2012 20:59:59...
Page 17 ISS 1 , SECTION 5 1 8-4 1 1 - 1 00 TELEPHONE 2A T-R party will hear audible ringback and the called ( NOTE 2 ) SET ( NOTE 3 ) station will have a flashing intercom lamp. ( W-BL ) The intercom audible signal at the called station will be blocked.
Page 18: Dial-Activated Features
Do-Not-Disturb 4.07 four parties (including originator) can be set up by any 6B KTS station. To set up a conference With the DND feature in effect, all 6B KTS 4. 1 0 call of two stations plus the originating station...
Page 19 Automatic callback (ACBK), when activated 4. 1 5 by a user who has dialed a busy station, can be handled by the 6B KTS. Additional attempts will automatically attempt to establish the connection will result in error tone. More than one connection when both stations become idle and a link is can go to the same alternate station.
Page 20 SECTION 5 1 8-4 1 1 - 1 00 and the system will attempt in calling station 30 and if station 20 activates will be suspended ACBK, the system will call back station 20 when completion again when both stations are idle. station 30 becomes idle, then ring station 30.
Page 21: Operation-Optional Fea Lures
(4) If station 20 is in the DND mode, or had FOUR LINKS become idle while OVRD is being activated, station 10 will hear ringback and station 20 will The basic 6B KTS is furnished as a two-link 5.01 be rung. system. To add the third and fourth link, a second 487A KTU must be separately ordered (5) If station 20 was being called, i.e.
Page 22: Paging Access
(except all page) require� a 278A using the handset. adapter as an interface between the 6B KTS and the amplifier (Fig. 7). A separate amplifier should (b) A station in HFAI cannot be ·added as the be supplied for each zone.
Page 23: Co/Pbx Line Access
2. ADD CONTINUOUS RING OPTION TO ASSOCIATED 484A KTU. Fig. 7-278A Adapter Connections for Paging Access 5.09 Any 6B KTS station can make a paging call (3) Paging station can now make announcement as follows: to speakers using telephone handset.
Page 24: Attendant Recall
Maintenance information pertaining specifically 6.0 1 must be terminated in a 1A1 or 1A2 line circuit to the 6B KTS is provided in three forms: having A lead control. The line circuit is required to determine whether the CO/PBX line is ringing, •...
Page 25 ISS 1 , SECTION S 1 8-4 1 1 - 1 00 2 and if provided, links 3 and 4. The test will then be repeated unless the STEP switch is depressed or the circuit pack turned off. If the STEP switch is depressed, the circuit pack will make the next C I RC U I T PACK SWITCH...
Page 26 SECTION 5 1 8-41 1 - 1 00 TABLE O VERRI DE (O VRD ) At override station, depress IC button, go off-hook IC dial tone Dial 0 1 I C dial tone Error tone - L Feature attempt by nonoverride station. 2.
Page 27 ISS 1 , SECTION 5 1 8-4 1 1 - 1 00 TABLE G DO-NOT - D IS TURB (DND ) At any station, depress IC button, go off-hook IC dial tone Dial Acknowledgment Tone Calling stations receive busy tone. Lamp will flash at DND station but audible signal is silenced.
Page 28 SECTION 5 1 8-41 1 - 1 00 TAB L E H CON F ER EN C ING ( F L E X ) A t any station, depress IC button, go off-hook I C dial tone Dial 0 3 ( 3 -party conference) or 04 { 4 · party conference) IC dial tone Error tone - Invalid procedure station...
Page 29 ISS I, SECTION 5 1 8-4 1 1 - 1 00 TA BLE I REMO TE ANSWER (REAN ) At any station, depress IC button, go off-hoo k . IC dial tone Dial FAI L U R E IC dial tone Error tone - invalid procedure1 station must reattempt feature activation.
Page 30 SECTION S 1 8-4 1 1 - 1 00 TABLE CAL L FORWARD ING ( C FW D ) At any station, depress IC button, go off-hook IC dial tone Dial 02 FAI L U R E Error tone - Automatic Callback i n effect. IC dial tone Busy tone - n o memory available.
Page 31 ISS I, SECTION S 1 8-4 1 1 - 1 00 TABL E K CO/PBX O P ERATOR R E CALL CO/PBX call i n progress Station flashes switch hook Flash dial tone Dial FAI L U R E Error tone - n o CO/PBX l i n k available ( 4 50 Timed flash to CO/PBX operator...
Page 32 SECTION 51 8-411-100 TABLE M A UTOMATIC CALLBA C K (A CB K ) Busytone received when IC station is called Flash switchhook Flash dial tone Dial 0 9 Error tone - IC dial tone ACBK already originated by station. 2.
Page 33 ISS 1 , SECTION S 1 8-4 1 1 - 1 00 TABLE N FEATURE CAN CELLA TION DND, ACBK or CFWD feature i n effect Originating station goes off-hook Reminder d i a l tone Originating station dials own station code Acknowledgment tone DND, ACBK and/or CFWD canceled...
Page 34 SECTION 5 1 8-4 1 1 - 1 00 REPLACE LAMP IS ONLY ONE STATION AT AFFECTED AFFECTED STATION CHECK FOR 10 VAC ON LG LEAD CHECK FUSE ARE AFFECTED STATIONS ON IN FUSE ONE 484A KTU BOARD* IS 10 VAC CHECK ON LAMP LG LEAD...
Page 35 ISS I , SECTION 5 1 8-4 1 1 - 1 00 REPLACE ASSOCIATED 484A KTU REPLACE REPLACE 485A KTU 486A KTU PERFORM DIAGNOSTICS TEST NO . 1 Fig. 1 0-No Dial Tone (Sheet I of 2) Page 35 Scanned by Frank Harrell, (Cowboy Frank) Castle Rock, Colorado Oct 15, 2012 21:07:57 BSP S18-411- 100-i01 1978-08-3 S.jpg...
Page 36 SECTION 5 1 8-4 1 1 - 1 00 REPLACE TROUBLE ASSOCIATED CLEARED 484A KTU CHECK FOR REPLACE TROUBLE FAULTY T AND R 486A KTU CLEARED CONNECTIONS PERFORI1 CHECK FOR DIAGNOSTICS FAULTY A LEAD TEST NO . CONNECTIONS Fig. 1 0-No Dial Tone (Sheet 2 of 2) Page 36 BSP 518-411-100-i01_1978-08-36.jpg Scanned by Fra n k Harrell, (Cowboy Frank) Castle Rock, Colorado Oct 15, 2012 2 1 :08 : 1 6...
Page 37 ISS 1, SECTION 5 1 8-41 1 - 1 00 IS ONLY REPLACE TROUBLE ONE STATION ASSOCIATED CLEARED AFFECT EO 4B4A KTU CHECK FOR REPLACE TROUBLE FAULTY T ANO R 485A KTU CLEARED WIRING CHECK FOR LINK CROSSTALK PERFORM DIAGNOSTICS TEST NO .
Page 38 SECTION 5 1 8-41 1 - 1 00 REPLACE TROUBLE ASSOCIATED CLEARED 484A KTU CHECK FOR FAULTY T AND R WIRING REPLACE 489A KTU REPLACE TELEPHONE REPLACE TROUBLE 4BSA KTU CLEARED REPLACE 485A KTU PERFORI'I DIAGNOSTICS TEST NO. 1 Fig. 1 2-Cannot Dial From Rotary Dial Telephone Set Page 38 BSP 518-411-100-i01 1978-08-38.jpg Scanned by Fra n k H arrell, (Cowboy Frank) Castle Rock, Colorado Oct 15, 2012 2 1 :09:01...
Page 39 ISS 1 , SECTION 5 1 8-41 1 - 1 00 CHECK OPTION PLUGS ON ASSOCIATED 484A KTU TROUBLE CLEARED CHECK FUSE ON FUSE REPLACE BOARD ASSOCIATED 4B4A KTU REPLACE BUZZER REPLACE 4BSA KTU TROUBLE CLEARED CHECK FOR FAULTY BZ , BZ 1 , OR B LEAD WIRING Fig.
Page 40 SECTION 5 1 8-4 1 1 - 1 00 IS DIAL TONE CHECK OPTION PRESENT PLUGS ON 486A SEE PROCEDURE TROUBLE FOR NO DIAL CLEARED TONE REPLACE 486A KTU TROUBL E CLEARED REPLACE TROUBLE CLEARED 485A KTU PERFORf'l DIAGNOSTICS TEST NO. 2 Fig.
Page 41 ISS 1 , SECTION 5 1 8-4 1 1 - 1 00 CHECK FOR PROPER TROUBLE INTERCOM CODE CLEARED ASSIGNMENT AND CUT-DOWN ( NOTE ) NOTE : I F AUDIBLE RINGBACK DOES REPLACE 484A NOT STO P AFTER CALLED PARTY KTU ASSOCIATED ANSWERS , REFER TO PROCEDURE...
Page 42 SECTION S 1 8-41 1 - 1 00 ARE ALL STATIONS REPLACE TROUBLE AFFECT EO 4B6A KTU* CLEARED GROUND H LEAO PERFORI'I AT AFFECTED DIAGNOSTICS STATION. PUT TEST NO. 8 CALL ON HOLD *CALLS I'IAY BE GOING ON HOLO CHECK WIRING BUT LAI'IP WINK FUNCTION IS NOT OF HOLD KEY OPERATING .
Page 43 ISS 1 , SECTION 5 1 8-4 1 1 - 1 00 REPLACE BUSY TONE HEARD TROUBLE ASSOCIATED WITH LINE BEING CLEARED 488A KTU RUNG OR ON HOLD CHECK FOR PROPER LINE ACCESS CODE ASSIGNMENT REPLACE LINE DROPPED OR TROUBLE ASSOCIATED GOES INTO HOLD CLEARED...
Page 44 SECTION 5 1 8-4 1 1 - 1 00 TABLE P CIRCUIT PACK HK-14 LAMP I N D I CATIONS AND SWITCHES LAMP OR SWITCH FUNCTION Indicates which link is being tested PASS Indicates the outcome of a test FAIL When lit, indicates proper operation of the A lead buss Status...
Page 45 ISS 1 , SECTION 5 1 8-4 1 1 - 1 00 REI'IOVE FIRST CONNECT HAND 4B4A KTU FROI'I TEST SET TO TERI'IINALS PLUG HK- 1 4 TURN SWITCH INTO JS TO ON A l l VOLTAGE SYSTEI'I I'IAY BE CHECK FUSING LINK LAI'IP SUPPLY LAI'IPS...
Page 46 SECTION 5 1 8-4 1 1 - 1 00 DIGIT SHOWS REPLACE 486A SEE FIGURE FOR LINK 3 ON VISUAL KTU OR SECOND CIRCUIT PACK LAMP ON DISPLAY 487A KTU PREPARA liON REPLACE REPLACE 486A PASS LINK 1 SECOND KTU OR FIRST LAMP ON LAMP ON 487A KTU...
Page 47 ISS 1 , SECTION 5 1 8-4 1 1 - 1 00 DEPRESS LINK 3 STEP LAMP ON TEST SWITCH IF 1 IS DISPLAYED AUDIBLE REPLACE DIGIT 2 SHOWS DEPRESS SWITCH RINGBACK 485A OR ON VISUAL AGAIN . IF 1 STILL 48SA KTU HEARD.
Page 48 SECTION 5 1 8-4 1 1 - 1 00 DEPRESS LINK STEP LAMP ON TEST SWITCH IS DISPLAYED REPLACE DIGIT 3 SHOWS BUSY TONE DEPRESS SWITCH 485A OR ON VISUAL AGAIN . IF STILL HEARD 486A KTU DISPLAY DISPLAYED. START FROM PREPARATION LINK 4 LINK...
Page 49 ISS 1 , SECTION 5 1 8-4 1 1 - 1 00 DEPRESS LINK 3 STEP TEST LAMP ON SWITCH IF 3 IS DISPLAYED REPLACE ERROR TONE DIGIT 4 SHOWS DEPRESS SWITCH 485A OR HEARD ON VISUAL AGAIN . IF 3 STILL 486A KTU DISPLAY DISPLAYED, START...
Page 51 ISS 1 , SECTION 5 1 8-4 1 1 - 1 00 DEPRESS STEP SWITCH IF 6 IS DISPLAYED DEPRESS SWITCH DISPLAY AGAIN . IF 6 STILL BLANK DISPLAYED , START FROM PREPARATION . REPLACE 485A OR 486A KTU DR REMOVE 484A KTUs ONE AT A TIME UNTIL DISPLAY SHOWS RING RATE .
Page 52 SECTION 5 1 8-41 1 - 1 00 DEPRESS STEP SWITCH IF 7 IS DISPLAYED DEPRESS SWITCH AGAIN . IF 7 STILL DISPLAYED, START FROI'I PREPARATION . REPLACE 4B5A OR 4BSA KTU OR REI'IOVE 484A KTUs ONE AT A TII'IE UNTIL DISPLAY WINKS.
Page 53 ISS 1 , SECTION S 1 8-4 1 1 - 1 00 DEPRESS STEP SWITCH IF 8 IS DISPLAYED DEPRESS SWITCH DISPLAY AGAIN. IF 8 STILL BLANK DISPLAYED, START FROM PREPARATION . REPLACE 486A KTU OR REMOVE 488A END OF KTUs ONE AT A TIME TEST 9 UNTIL DISPLAY SHOWS...
Page 54 SECTION S 1 8-4 1 1 - 1 00 DEPRESS STEP SWITCH IF A IS DISPLAYED DEPRESS SWITCH DISPLAY AGAIN. IF A STILL BLANK DISPLAYED , START FROM PREPARATION. REPLACE 485A OR 486A KTU OR REMOVE 4B4A KTUs ONE AT A TIME UNTIL DISPLAY SHOWS REPLACE...
Page 55 ISS 1, SECTION S 1 8-4 1 1 - 1 00 572A1 KSU A25B CONNECTOR CABLE PLUG Fig. 3 1 -Terminations of Incoming CO/PBX lines i n 572A 1 KSU Page 55 Scanned by Frank H arrell, (Cowboy Frank) Castle BSP 518-41 1-100-i01_1978-08-SS.jpg...
Page 56 SECTION S 1 8-41 1 - 1 00 A25B 1 84C 1 BACKBOARD 572A1 KSU CONNECTOR CABLE BLOCK A PLUG COLUMN A A ( 1 ) B 1 1 27 ( 2 )---< 28 ( TO J 19B L ( 1 ) B 1 4 1ST 488A KTU A (2 )
Page 57 ISS 1, SECTION 5 1 8-4 1 1 - 1 00 572A1 KSU A25B 184C1 BACKBOARD (SEE TABLE E ) CONNECTOR CABLE BLOCK A COLUMN E (W-BL ) (BL-W ) 27 � (O-W) 2 � (W-G) STATION 3 � FUSE 1 2 9 �...
Page 58 SECTION S 1 8-4 1 1 - I 00 572A1 KSU A25B 184C1 BACKBOARD CONNECTOR CABLE ( SEE TABLE E ) BLOCK A COLUMN F 27 ( ( O-W) ( W-G ) 28 ( B 1 0 STATION 1 5 ( G-W) FUSE 2 O R 65...
Page 59 ISS I , SECTION S I 8-4 I I - I 00 572A1 KSU A25B 1 84C1 8ACKBOARO CONNECTOR CABLE (SEE TABLE E ) BLOCK A COLUMN G B 1 3 ( W-O ) 27 ( (O-W) ( W-G ) 28 ( (G-W) STATION 20...
Page 60 SECTION S 1 8-4 1 1 - 1 00 572A1 KSU A25B 184C1 BACKBOARD CONNECTOR CABLE ( SEE TABLE E ) BLOCK A COLUMN H B 1 9 0 J9B 4TH 48 ( 0-W) 4A KTU STATION 25 ( W-G ) B 1 7 28 ( ( G-W)
Page 61 ISS 1 , SECTION S 1 8-4 1 1 - 1 00 572A1 KSU A25B 184C1 BACKBOARD CONNECTOR CABLE ( SEE TABLE E ) BLOCK 8 COLUMN A ( O-W) ( W-G) 28 ( ( G-W) STATION 30 FUSE 6 ( BR-W ) 30 ( ( S-W)
Page 62 SECTION 5 1 8-41 1 - 1 00 572A1 KSU A25B 1 B4C1 BACKBOARD CONNECTOR CABLE ( SEE TABLE E ) BLOCK B COLUMN E P6 26 ( W-8L ) 8 1 2 1 � ( - - - -: ( ,:, 8 =-, L - ,:;. W _,_ ) 2 �...
Page 63 ISS 1, SECTION 5 1 8-4 1 1 - 1 00 572A1 KSU A258 1 84C1 BACKBOARD CONNECTOR CABLE ( SEE TABLE E ) BLOCK 8 COLUMN F P 7 26� � 26 r --<> -'- -- - - -i T :-- - B 1 4 ( O- W ) 2 �...
Page 64 SECTION 5 1 8-4 1 1 - 1 00 572A1 KSU A25B 1 84C1 BACKBOARD CONNECTOR CABLE ( SEE TABLE E ) BLOCK B COLUMN G 26 � ( - - - --' ( C:: W .,..= -B ::.;; L + ) ( W -O) 0 J 1 4B B3B }-...
Page 65 ISS 1 , SECTION 5 1 8-41 1 - 1 00 572A1 KSU A25B 1 84C1 BACKBOARD CONNECTOR CABLE ( SEE TABLE E ) BLOCK B COLUMN H ( W-BL ) (BL- W ) B7 , 27 � TO STATION 50, ( 0- W ) 2 �...
Page 66 SECTION 5 1 8-4 1 1 - 1 00 572A1 KSU A25B 184C1 BACKBOARD CONNECTOR CABLE ( SEE TABLE F ) BLOCK C COLUMN A (W-BL ) 26 � ( BL-W ) ( 0-W) 2 � (W-G) B 1 0 28 �...
Page 67 ISS 1 , SECTION 5 1 8-4 1 1 - 1 00 572A1 KSU A25B 1 B4C 1 BACKBOARD CONNECTOR CABLE ( SEE TABLE E ) BLOCK C COLUMN E 8 1 4 STATION 60 FUSE 1 3 0 J 1 88 1 3TH 48 4A KTU B 1 9...
Page 68 SECTION S 1 8-4 1 1 - 1 00 572A1 ( SEE NOTE ) L - - - - - - - - - -� NOT E : IF BLOCK B IS ADDED FOR EXPANSION ROUTE CABLE SHOWN BY BLOCK A BLOCK B DASHED LINE TO ACCESS CODES 25-29.
Page 69 1 1 0A APP 420A KTU MOUNTING ( NOTES 2 ANO 5 ) OFF-PREMISES TELEPHONE SET ( NOTE 1 ) ( NOTE 4 ) 6B KTS ( NOTE 3 ) STRAPS A BAT A GRD B BAT B GRD 1 05� KTS POWER...

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