Bell System Practices 2851 Identification, Installation, Connections, And Maintenance Download Page 6 | Manualshive

Page: 6 / 27

background image

«
...
4
5
6
7
8
...
»

Summary of Contents for 2851

Page 1: ...e 851CM rotary dial and 2851CM TOUCH TONE dial codes are available as a completely assembled telephone set or a basic modular telephone set base 2 03 Purpose Provides features of a 6 button key station 5 line pickup and hold at wall installations 2 04 Application Used with central office or PBX line circuits in lA 1A1 1A2 or 6A key telephone systems Both the 851 and 2851 type sets are wired for 1A...

Page 2: ... modular TABLE A COLOR ORDERING GUIDE HOUSING CORDS COORDINATED AND HANDSET FACEPLATE COLOR SUFFIX COLOR SUFFIX Black 03 Charcoal 70 Ivory 50 Muted Ivory 80 Green 51 Light Green 71 Red 53 Muted Red 69 Yellow 56 Light Yellow 72 White 58 Light Gray 73 Light Beige 60 Muted Beige 75 Aqua Blue 62 Muted Blue 76 2 06 Design Features Sets are surface mounted on wall or vertical surface using holes for sta...

Page 3: ...e keyhole slots or holes provided for mounting over an electrical outlet box Caution A void damage to wall or telephone set whenever chassis is in lowered position 3 03 All sets except the CM codes can be wired using either inside wiring cable or connector cable When mounted over an outlet box bring wiring through opening in base pan before mounting When exposed bring wiring up from bottom right s...

Page 4: ...th operation of line switch Cable is routed and fastened in same manner as IW cable Fig 7 and 8 3 07 Check before terminating that sufficient slack is provided to permit hinging action of chassis assembly Page 4 Cable slack must be in area behind dial and not touching ringer Chassis cannot be secured if slack lies between base pan and network or base pan and cord jack 3 08 Since individual termina...

Page 5: ...s in lowered position fasten switch assembly to line switch bracket using screw provided in kit Screw must be inserted in hole from rear of bracket 2 Position switch assembly horizontally Fig 5 or 10 and fasten securely 3 11 Polarity Guard When required with the 2851 type telephone set install the adhesive backed 819041971 P 90D197 guard assembly to the left hand bracket in the position shown in F...

Page 6: ...furnishing speakerphone features certain leads must be disconnected insulated and stored to avoid interference with working circuits The designation of leads to be removed are as Page 6 Fig 8 lnside Wiring Cable from Outlet Box Early Version follows T1 V G R1 G V P3 or IT V BR P4 or IR BR V AG V S and LK S V 3 16 Buzzer The KS 20419L1 buzzer is mounted on an insulated bracket below the dial Fig 13...

Page 7: ...ig 12 Dial Adapter Bracket hold position lamp must be furnished separately where the associated lamp leads are insulated and stored Line appearances on the key can be rearranged by switching the color coded plugs on the rear of the key or rearrangement of the cross connections at the key equipment If multiline conferencing option is provided the 635A5 key must be replaced with 635CF5 key and a 2Al...

Page 8: ... for connections of these handsets An H4CJ or equivalent handset cord must be used on nonmodular type handsets 3 22 Installation of Spade Tipped Handset Cords in Early Production Sets Equipped With G12A Handset Fig 14 To install spade tipped handset cord H4CJ or equivalent remove J hook stayband from the cord Cut back and remove cord sheath to stayband marks Thread spade tipped conductors through ...

Page 9: ...f housing Use a KS 21107 type releaser or equivalent to depress the tab of the faceplate retainer clip while seating the faceplate To insure proper positioning of the retainer clip raise the handle ISS 8 SECTION S03 601 101 of the releaser well above horizontal as shown in Fig 15 before withdrawing the tool 2 If installing 2851A faceplate 2851 type telephone set place station number card in from f...

Page 10: ...clusion Switch Connections Fig 25 Hold Lamp Connections Fig 26 851BT 851B or 851BM Telephone Set Connections Fig 27 2851BT 2851B or 2851BM Telephone Set Connections Fig 28 851CM Telephone Set Connections Fig 29 2851CM Telephone Set Connections 5 MAINTENANCE 5 01 Maintenance replacement should be limited to the following Complete telephone sets Modular items Optional items Replaceable components 5 ...

Page 11: ... to the ringer is obtained by lowering the hinged chassis assembly The ringer ISS 8 SECTION 503 601 101 can be removed by loosening the two shouldered mounting screws 5 07 The current production 635 type keys have been modified for easy lamp replacement by merely removing the lamp cap and inserting a 553 type tool through the hole in the top of the button In early production keys it was necessary ...

Page 12: ...SECTION 503 601 101 851A HOUSING 851A FACEPLATE s 2851 A FACEPLATE 851 8 TELEPHONE S ET BASE Fig 18 t851B and 28518 Telephone Set Early Version Showing 851A Housing and Base Plate Page 12 ...

Page 13: ...I I I I B51A FACEPLATE ISS 8 SECTION 503 601 101 I SQUARE ENO OF COR D B51BT TELEPHONE SET BASE Fig 19 Station Modular Arrangement 851BT and 2851BT Telephone Set Showing Later 851A Housing and Base Plate Page 13 ...

Page 14: ... 503 601 1 0 1 851A HOUSING B51A MOl M FACEPLATE M REPLACED BY B52A ROTARY AND 2B52A TOUCHTONE FACEPLATES 2B51A MDJM FACEPLATE Fig 20 Station Modular Arrangement 85 1CM and 285 1CM Current Telephone Se Page 14 ...

Page 15: ...EL SET M16H CORD TO TERMINATE MI6H CORD ON TERMINAL STRIP OF 851 OR 2851 TYPE TELEPHONE SET liSE 161A ADAPTER Fig 23 Biock Diagram of 4A Speakerphone Located at Station Using 223D Adapter R A ORH 8 Nb wt NOTE 1 __ r f ET 41 V 8L ER 42 BL V A OR H 43 V 0 NOTE 3 __ EB 44 0 V NOTES 4 lt V 8L A W 8L BL V z BL W 7 W 0 i V 0 O W IO 0 Vl nt j PU 3 KEY EXCLUSION SWITCH P 21F938 8121 69381 I STORED SPADE T...

Page 16: ... KS 20419 ll HOLD LA P r G Y G TB CB STRAP BL 21 G Y 36 G Y 0 c BZ lTO KTS STRAP BL 12 Y G 35 Y G o BZI Y G NOTE IF HOLD LA P OPERATION IS REQUIRED REMOVE INSULATE AND STORE BUZZER LEADS Fig 25 Hold Lamp Connections Page 16 ...

Page 17: ...able Do not use 10 volt ac lamp battery Insulate and store t Network terminal undesignated terminals are on terminal board TABLE C PICKUP SIGNAL KEY CONVERSIONS TEL KEY KEY LEAD SET OPTION 0 W S W G R BL BK BR BK HPPPPP 9 9 9 9 9 HPPPPS 9 9 9 9 11 851 or HPPPSS 9 9 9 11 11 2851 Type HPPSSS 9 9 11 11 11 HPSSSS 9 11 11 11 11 HPPP P S 9 9 6 6 3 HPP P P S 9 6 6 6 3 For common signaling with intercommu...

Page 18: ...RJ J 0 IBR W 9 W 5 10 5 W II R BL 12 IBL R 13 tR 01 14 0 Rl ll R GJ _ 16 G RI 17 R BRI 10 BR RJ 19 R SI 20 S RI 21 BK BL 22 IBL BKI 23 81 0 0 BKl Cl IBK Gl _ 26 IG BKI 27 IBK BRI 20 IBR BKI 29 BK S 30 IS SKI 31 Y Bll 32 BL Y 33 Y 0 34 0 Y IY Gl 36 G Y 37 Y BR 30 IBR Y 39 Y S 40 5 Y 41 IV BLI 42 IBL VI 43 V Ol 44 0 VI 4 V GI 46 Q 11 47 IV SRI 40 SR Vl 49 IV 51 o IS VI TERMINAL BOARD 635A5 kEY IV G ...

Page 19: ...ARE EQUIPPED WITH GlA6 HANDSET llrliCH IS WIRED DIRECTLY TO THE TELEPHONE SET EARLY PROOUCTION 851 TYPE TELEPHONE SETS WERE EQUIPPED W ITH A G12A HANDSET USING A PLUG ENDED CORD ISS 8 SECTION 503 601 101 H4CJ CORD IWI WI RI SKI WI H40B CORD G3A HANDS NOT riI J ET 21 RCVR r TRMTR GI2A HANDSET 2 rn WI I 21 RCVR I RI I J SKI TRMTR H40U GISA CORD HANOSE T m WI WI I I IRI RI I SKI r 31 RCVR TRMTR l 851...

Page 20: ...IW BRJ It 8 BR W 9 I W S 10 IS WI II R BLI 12 IBL RI tR 01 1 4 to RI R Gl 16 IG Rl 07 IR BRJ 18 BR Rl 19 IR S I 20 IS RI 21 BP BLl 22 IBL 81 1 23 BK 01 24 0 BKI I IBK GI I 26 IG BKI I 27 BK BR t 6 28 IBR BK 0 29 IBK S 1 lO S BKI I 31 IY BLI I c 32 IBL Y 33 Y 01 c 34 0 Y i Y G 12 36 tG YI i 37 Y BRI T 38 IBR Y II 9 Y SI 19 40 S YI 14 41 111 Bll 16 42 Bl 111 18 43 V Ol 44 tO VI r 10 IV GI 46 IG Ill ...

Page 21: ... INSI l AT 0 AND STORED CURRENT MODEL PIA RINGERS DO NOT HAVE Bl LEAD 2 LATER 28518 MD HLEPHONE SETS ARE EQUIPPED liTH G3A6 HANDSET WHICH IS WIRED DIRECTLY TO TELEPHONE SLT EARLY PROOUCTIOH 2851 TYPE HLEPHONE S TS R EQuiPPED WITH A GIZA HANOS T USING A PLUG ENDED CORD 2851 ElM TELEPHONE StTS ARE SHIPPED WITH GISA HANDSETS AND H40U HANDSET CORD I NSULATEO AND STORED RINGER I IRI NOTE I I 8LI r T IR...

Page 22: ...I 2 IS WI I IR BLI I LG BL RI L R 01 _t F lj _ _ _ 9 0 Rl l R GJ IG RI 2 IG AI I tA BRI I LG BR Rl I L IR S l F IS RI I IBL 81 IBK BLI 2 IBL BK BK BL I LIG BK Ol 10 BKI I L IBK G I IG BK I BR BKI IBK BR 6 z IBR BK BK BRI I IBK 5 LG 15 BK L IY BLI Rl IBL YI z I 7 Y 0 0 0 G NOTE 21 10 YI IV G IZ I BL IG Y zl I BLI Y BRJ i IBR Y II Y 51 19 5 Y 14 V BU 16 BL VI 18 II V Ol o 0 YI 10 V Ol II G Y IY BRI ...

Page 23: ...NE ROOVE G LEAD FROM TERM 2 ANO CONNECT TO TERM F REPLACE 8RA DIAL WITH BCA DIAL AND CO ECT Y LEADS TO TERMS 15 AND 17 SPEAKERPHONE LEADS R1 C V Atfl T1 VG ARE INSULATED Atll STORED IN SETS MANUFACT JRED AFTER JUlY ZO 1979 liEN INSTAlllt SPEAt ERPtiONE CONNECT THE R1 G V TO TERMINAL B Atll THE T1 V G LEAO TO NENlRK TERMINAL RR 851CM TELEPHON SETS ARE SHIPPED WITH G1 iA HAhllSET ANO THE H4DU HAhDSE...

Page 24: ...o_ _w_l H 11 21 PICKUP T 21 R 121 BZ BL SG 81 Rl T 0 W 4 Y W Gl LLG tG WI I tW BRl IBR Wl 12 21 14 NOTE Z G IBLI IBLI Y BRI SKI R 2NO PICKUP RO PICKUP 4TH PICI UP 5TH PICKUP 46 R 16 18 G l 47 22 48 40 24 A OR H TO IV GI NOTE 2 fRo lc __ _ _ _ ___ G V 1 lT IR IV SRI IBR VI 10 Y IBLI G tBLI zQ vl AG tV l L t j s jv l 2 0 1 51 M I Fig 29 2851CM Telephone Set Connections Sheet 1 of 2 TO SHEET 2 ...

Page 25: ...M HRMS 1 AND l INSULATE AND STORE SPEAKERPHONE LEADS R1 G V At T1 V G ARE INSULATED At STORED IN SETS MANUFACTURED AFTER JULY 20 1979 w tEN INSTALLING SPEAKERPHONE CONNECT THE R1 G V LEAD TO TERMINAL H Mll THE T1 V G LEAD TO NETI 40RK TERMINAL G 5 2851 CM TELEPHONE SETS ARE SHIPPED WITH G1 5A HAtllSETS Atl H40U HAt lSET CORD 4 ON SETS MAM JFACTUR 0 PRIOR TO 4 1 78 ThE tRHN AND 1 ti ITE HAt lSH COR...

Page 26: ... TELEPHONE SET Fig 30 able Routing on Current 851 CM and 2851CM Telephone Sets at Exposed Wire Locationt Page 26 TELEPIIONE WIRED THROUGH OUfLET BOX Fig 31 Cable Routing in Current 851 CM and 2851CM Telephone Sets at Prewired Locationt ...

Page 27: ... w c Note For use when specified by local instructions for end to end signaling installations ISS 8 SECTION 503 601 101 TABLE E 2A1 MATRIX BLOCK LINE LINE TERM l TATION TERM LEFT RIGHT T 1 1 1 R 5 5 T 7 7 2 R 11 11 T 13 1 3 3 R 17 17 T 19 19 4 R 23 23 T 25 25 5 R 29 29 T 31 31 6 R 35 35 T 37 37 7 R 41 41 T 43 43 8 R 47 47 If more than 8 lines are provided additional 2A1 matrix blocks are required ...

Reviews:

No comments

Related manuals for 2851

Brand: Panasonic Pages: 8

Brand: Panasonic Pages: 10

Brand: Panasonic Pages: 8

Brand: Panasonic Pages: 10

Brand: Panasonic Pages: 8

KX-TG7622, KX-TG7623, KX-TG762

Brand: Panasonic Pages: 10

Brand: Panasonic Pages: 6

Brand: Panasonic Pages: 72

DECT Elite 9035+1

Brand: Uniden Pages: 68

Brand: Radio Shack Pages: 44

Brand: Walton Pages: 16

Brand: Uniden Pages: 36

Brand: Radio Shack Pages: 25

Brand: GAI-Tronics Pages: 8

Brand: switel Pages: 88

Brand: VTech Pages: 16

Brand: Moshi Pages: 7

Brand: AEI Pages: 6

Brands by name

0 1 2 3 4 5 6 7 8 9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Popular brands

Load more brands