JACKS


Instrument Jacks for Telephone, and operators etc are just numbered (1, 2, 3 etc).

Switchboard jack units are known by numbers and suffixes (300A, 300B, 400A, 1000A etc) where the thousand or hundred digits represent the number of "points" (3, 4, 10 etc).  The suffix letter represents the gauge of the jack, letters A to L are used for this purpose).

Switchboard Jacks on Jack Mountings are known by numbers with two suffix letters.  The hundreds (and thousands) figures and the first suffix letter signify the "unit" jack used, the tens and units, the number of the units on the jack mounting and the second suffix (letters N to Z) distinguish the jack mounting.  The suffix M is substituted for A when two or more types of unit are on the same jack mounting. 

Typical Switchboard Jack Designation
For example - Jack No. 320BN where the following breakdown applies:-
3 = Number of tags/points per strip.
20 = Number of Jacks per strip.
B = Gauge.
N = Method of fixing.

The later light grey coloured, plastic jacks comprise of a number of single units.  These are called Parts DJA12 (dummy jack), DJA17 (auxiliary contact set) and DJA 18 (jacks with springs and contact sets).

Click on any image to enlarge

 
Jack No. 2

Three Jacks No. 500A in a row. Used with Plugs No. 201, 301, 401 and 601.

Superseded by the Jack, Instrument N.T. No. 6.

 

 
Jack No. 3

A 4 way single flat socket that fits under a keyboard.

Used with Plug No. 404.

Superseded by the Jack No. 19.

 

 
Jack No. 4

4 way double flat socket.  For use with table telephones to Diagram CB30, CBS16 and CBS166.

Diameter - 1.75".

Used with Plug No. 404.

Superseded by the Jack No. 20.

 

 

Jack No. 5

Four  Jacks No. 500A, 2 pairs in a row. Used with Plugs No. 201,301,401 and 601.

 

 
Jack No. 6

4 x 1 way single wall socket.  Fits under a keyboard.

Used with Plug No. 407.

Superseded by Jack No. 21.

 

 
Jack No. 7

1 x 7 way single wall socket.  For table telephones.

Used with Plug No. 701.

 

 
Jack No. 8

4, 1-way flat jack, made of Ebonite.

Used with Plug No. 406 or Plug, Instrument, N.T. No. 1.

Also part of a Mounting, Dial, Automatic No. 4 and No. 5.

Size - 59mm x 18mm x 40mm.

ATM Part - T653.
Siemens Brothers Part No. 16.
Plessey Part - N4952A.

Used with a Plug, No. 406 or Plug, Instrument N.T. No. 1.

Drawing - 62311.

 


 

Jack No. 9

9, 1-way jack used with table telephones.

Used with the Plug No. 701.

Diagrams - EC527 and CBS265.

  

 
Jack No. 10

5, 1-way flat socket - similar to Jack No. 8.

Used on Monitors Desks.

Used with the Plug No. 501.

Size - 70mm x 19mm x 40mm.

Siemens Brothers Part No. 27.

Drawing - 62312.

  

 
Jack No. 12

4 x 2 way with break contacts.  Used on Electrophone tables.

Used with the Plug No. 406.

  

 
Jack No. 13

3 x 1 way and 1 x 2 way wall socket with a break contact on one connection.

Used when table telephones require portability.

Used with Plug No. 407.

Superseded by the Jack No. 21.

 
 
Jack No. 14

Wall socket comprising on two Jacks No. 500A.

10 terminals for table telephones (magneto).

Used with Plugs No 201, 301, 401 and 601.

Superseded by the No. 64 or where unsuitable, by two Jacks No. 500B6/N.

  

 
Jack No. 15

1 x 2 way socket with porcelain base.

Used with Plug No. No. 204.

Superseded by the Jack No. 16.

  

 
Jack No. 16

1, 2-way socket on ebonite base.

Used with Plug No. No. 205.

Supersedes Jack No. 15.

  

 
Jack No. 19A and 19B

1, 4-way socket used on switchboards.

Used with Plug No. 404.

Size - 66mm x 45mm x 47mm.

There is a Mark 1 and 2.  The difference is the jack body.  The Mark 1 being oblong in shape and the Mark 2 not being oblong shaped.

Jack No. 19A - Front plate is 1.75" high,
Jack No. 19B - Front plate is 2.75" high.

ATM Part - T4195.
Siemens Brothers Part - 131A.
Plessey Part - N4970.

Click here for more pictures.

Supersedes the Jack No. 3.

Drawing - 62313.

 

 

   

Jack No. 20A and 20B

2, 4-way socket used on switchboards.  It is supplied with a mounting case.

Used with Plug No. 404.

Size - 86mm x 45mm x 51mm.

Supersedes the Jack No. 4.

ATM Part - T4194.

Siemens Brother Part No. 125A.

Drawing - 63963.

 






 
Jack No. 21

5, 1-way jack used on subscribers extension plans.

Plug breaks one contact.

Supersedes Jacks No. 6 and 13.

Superseded by the jack No. 65.

Used with Plug No. 404.

  






 
Jack No. 22

6, 2-way sockets for selector racks.

Used with Plug No. 1201.


 
Jack No. 23

10, 2 way sockets for selector racks.

Used with Plug No. 2001.


 
Jack No. 24

13, 1 way sockets for ATM connector racks.


 
Jack No. 25

9 way jack used with the Keyboard Baudot Mark 5.

It comprises of 6 x 2 way sockets and 3 x 1 way sockets.

Connects to a Plug No. 902.

 

 
Jack No. 26 and 26A

12, 2-way jack.

No. 26 is used in telephone exchanges on equipment racks.
No. 26A is with Dynamotors No. 3A, 4A, 11 to 16.

Used with the Plug No. 2402.

Drawings - 60071 and 60072.

 


Jack No. 26



  
Jack No. 27

12 point.

 

 
Jack No. 28

This is a 9 way jack used with Transmitters, Multiplex No. 1.

Accepts a Plug No. 901.

Drawing - 8451.

   

 
Jack No. 30

12, 1-way jack, used with the Plug No. 1202.

Fitted to Boxes, Coin-collecting No. 13 or Box, Cash No. 5.

Used with Plug No. 1202.

This facilitates the connection with the Mechanism No. 13.

 

 
Jack No. 36

10, 2-way jack used on line switch units in automatic exchanges. 

Used with a Plug No. 2003.

Superseded by the Jack No. 51.

 
 
Jack No. 39

2, 1-way Jack used with Plug No. 221.

Used with Receiver, Headgear No. 1A.

 

 
Jack No. 40

16, 2-way jack for selectors and relay-sets. Top of channel type shelves.

Used with the Plug No. 3201. 

Drawing - 9213.

 
 
Jack No. 41

16, 2-way jack for selectors and relay-sets.  Bottom of channel type shelves.

Used with the Plug No. 3201. 

Drawing - 9213.

  
 
Jack No. 43

8, 2-way jack for selectors.

Used with the Plug No. 1603. 

  
 
Jack No. 44

6, 1-way jack used on Panels, Telegraph.

Used with Plug, Instrument, N.T. No. 3. 

Drawing - 9606.

 

 
Jack No. 47

6, 1-way jack used on equipment racks.

Drawing - 9541. 

 

 
Jack No. 48

4, 1-way jack  used on equipment racks.

Drawing - 9556.

 

 
Jack No. 49

3, 2-way jack.

The plug breaks 6 contacts.

Used with the Plug No. 607. 

Drawings - 9573 and 9754.

 

 
Jack No. 50

9, 1-way jack used on the Equipment, Table, TG804.

Used with the Plug No. 903.

 

 
Jack No. 51

12, 2-way jack, with 10 sets of two break springs and two sets of 2 open circuit springs.  Used on Routiners.

Dull nickel plated frame with zinc plated brackets.

Used with the Plug No. 2403.

Drawing - 60307.


 
 
Jack No. 52

9, 1-way jack used with the Baseboard No. 27.  Used with the Teleprinter No. 7.

Used with the Plug No. 903.

Drawing - 60176.

 

 
Jack No. 53

12, 2-way, Spring-sets.  Similar to Jack No. 54.

Used on HES No. 1 telephones and HES Transfer Units.

Used with the Plug No. 2404.

Drawings - 62306 and 62306/1.

 


 
 
Jack No. 54

20, 2-way, Spring-sets.

Used on telephones on HES No. 1 & No. 2.

Used with the Plug No. 4001A.

Drawings - 62306 and 62306/1.



  
Jack No. 55

21, 1-way jack.

Used with the Plug No. 2102.

Drawing - 60419. 

 

 
Jack No. 56

13, 1-way jack used with the Tester TG956 and 957.

Used with a Plug No. 1301.

Drawing - 60534.

 

 
Jack No. 57

25, 1-way jack used on the Box, County Satellite No. 1.

Accepts a Plug No. 2501.

Drawing - 60827.

 

 
Jack No. 58

24, 1-way jack.  As Jack No. 51 but with 12 sets of 2 open circuit springs.

Used on the Amplifier No. 1 with Plug No. 2403.

Drawing - 60926.

 



 
Jack No. 59 and 59A

16, 1-way jack used on the Bellsets No. 33, 35 and 36.

Drawings - 61037 and 90901.

 

 
Jack No. 60

17, 1-way jack used on Telegraph instrument tables for Teleprinters No. 3A, with answer-back device.

Used a Plug No. 1701.

Drawing - 61028.

 

 
Jack No. 61

16, 2-way jack used with relay-sets and 2000 type selectors.

Used with a Plug No. 3201 or 3202.

Drawing - 61173.

 



 
Jack No. 62

8, 2-way jack used with relay-sets and 2000 type selectors.

Used with a Plug No. 1603 or 1605.

Drawing - 61170.

 

 
Jack No. 63

4, 1-way jack.  Black enamelled metal plate, equipped with four 2 spring break jacks.

Used for tone isolation purposes on 2000 type selector racks.

Used with a Peg No. 55.

Drawing - TP1016.

  


 
 
Jack No. 64

6, 1-way jack with break contacts on pins 3, 4, 5 and 6.

For use on subscribers extension plans installations. Surface fixing.

Used with Plug No. 612.

Drawing - 62326.

Diagram - N664.

 



 
Jack No. 65 and 65A

4, 1-way Jack used with Plug No. 404.

Springs 4 and 4A break when plug is inserted.

Size - 62mm x 64mm x 35mm.

Used in customers premises as part of a Plan 4 installation.

Used with a Plug No. 404.

Superseded by the Jack No. 95A.

Drawings - 62328, 62329 and 90926.





 
 
Jack No. 66

3, 1-way jack.

Wall socket for lines of telephone circuits in Boxes, Divider, floor or wall, fitted in public buildings.

(Formerly Plug, Wall, Socket, No. 9).

Used with a Plug No. 228.

 
 
Jack No. 67

A flush fitted jack containing two shrouded pins.

Used with the Plug No. 232. 

Drawing - CD444.

 
 
Jack No. 68

6, 1-way jack  for flush fitting.

Used with the Plug No. 613.

Drawing - CD488.

 
 
Jack No. 69

25, 1-way jack with pin connections.

Used with the Teleprinter No. 11 on the Teleprinter, automatic, switching scheme.

Used with Plug No. 2502.

Drawing - 63990.

 


   
Jack No. 71

12, 1-way jack used with the Relay, Polarised No. 4B.

 
 
Jack No. 72

12, 1-way jack  used with the Relay, Polarised No. 2B.

Drawing - 70183.

 


   
Jack No. 73 and 73A

Four way, concentric, twin jack with two plunger type keys and two rectifiers.

Size - 117mm x 47mm x 102mm.

Drawings - 90190 and 90191.

 

 
Jack No. 73B

As Jack No. 19/2 but with larger front plate.

Size - 117mm x 47mm x 47mm.

Drawing - 90209.

 

 
Jack No. 74

4, 1-way jack used for jacking-in Equaliser-unit, No. 14
Equipment 51- type Parts: Link D66524.

Drawing - 66688.

 
 
Jack No. 75

12, 1-way jack that is used with a Plug No. 1206.

These jacks could fit in varies assemblies.

Drawings - CD954/1 and CD954/2.

 



  
Jack No. 76

24, 1-way jack that is used with a Plug No. 2405. 

These jacks could fit in varies assemblies.

Drawings - CD954/1 and CD954/2.

 



  
Jack No. 77D

4, 1-way jack that is used with a Plug No. 417.

These jacks could fit in varies assemblies.

The Jack No. 77D was used on 700 type renters CCB's.  It was only used if the mechanism was removed for repair.  In this case the CCB only had a 999 service.

Drawings - CD954/1 and CD954/2.

Top picture shows a Jack No. 77D and the lower picture is a Jack No. 77F.

 


Jack No. 77D


Jack No. 77F

 
Jack No. 78

18, 1-way jack that is used with a Plug No. 1803. 

These jacks could fit in varies assemblies.

Drawings - CD954/1 and CD954/2.

 

 
Jack No. 79

33, 1-way jack that is used with a Plug No. 3301. 

These jacks could fit in varies assemblies.

Drawings - CD954/1 and CD954/2.

A Jack No. 97F is shown pictured.

 


Jack No. 80

6, 1-way jack used with the Plug No. 614A. 

 
 
Jack No. 81A and 81B

4, 1-way jack, without cover for panel mounting. For Receiver H.G. No. 15S.

Used with a Plug No. 418.

Drawing - CD1036.

 
 
Jack No. 82

8, 1-way jack that is used with a Plug No. 803. 

These jacks could fit in varies assemblies.

Drawings - CD954/1 and CD954/2.

 

 
Jack No. 83

6, 1-way jack that is used with a Plug No. 616. 

These jacks could fit in various assemblies.

Drawings - CD954/1 and CD954/2.

 

 
Jack No. 83G

 
Jack No. 84A, 84B and 84C

4, 1-way miniature jack used with Plug No. 420.  The No. 84A is shown pictured to the right.  The No. 84B is enclosed in a lozenge shaped plastic cover.  The No. 84C has a circular nut in place of the hexagonal fixing nut.

Supplied in the colours, black and grey.

When Jacks No. 84 are required switchboards the following Jack, Plates are used:-
Single jack - 1/DPL/719.
Double jack - 1/DPL/695.

Plessey Part - N5076A1 (No. 84A).
Plessey part - N5076A2 (No. 84B).

Drawing - 90841.

 


Jack No. 84A


Jack No. 84C

 
Jack No. 85A

16, 2-way for use on 2000-type Relay-Sets in special cases only.

Used with the Plug No. 3203.

Drawing - 70774.

 

 
Jack No. 86A

16, 2-way jack for use on 2000-type Relay-Sets in special cases only.

Used with Plug No. 3204.

 

 
Jack No. 87A

24, 1-way jack for isolating apparatus.

Used with Links, Isolating No. 3A.

Connects with a Plug No. 2406.

Drawing - 70833.

 

 

 
Jack No. 88A

36, 1-way jack  for isolating apparatus.

Used with Links, Isolating No. 4A.

Connects to a Plug No. 3601.

Drawing - TP1183.

 

 
Jack No. 89A

42, 1-way jack for Uniselectors No. 4/... type.

Fits on a Drilling No. 151 or 152.

Drawing - 70866.

 



   
Jack No. 90A

12, 1-way jack for Relay, Polarized No.5E/..

Drawing - 70918.

 



   
Jack No. 91A

11, 1-way jack for Relay, Polarized No.6F/...

Drawing - CD1796.

 

 
Jack No. 92

A 24 way jack used on a Panel, Mounting.

Uses a Plug No. 2407.

Drawing - CD1615. 

 

 
Jack No. 93

16, 1-way jack used with a Plug No. 1608, used on the Carrier System WB400.

Made by McMurdo, their red range 16 way barrier polarised connectors (Plug No. RP16 and Jack No. RS16).

Drawing - CD1615.

 

 
Jack No. 95A

4, 1-way surface mounted jack used with Plug No. 420.

There are two models of this jack.  On the later model the cover is released by squeezing the sides, whilst on the early version the cover was fixed by two screws.

Terminals 1 to 4 connect to the plug whilst terminals 4 and 4A consist of a contact set that breaks when the plug is inserted.

Colours: Ivory and Grey.

Generally used on the GPO Extension Plan No. 4 system.

Superseded the Jack No. 65.

Drawings - CD2560, 91496 and 93636.

Specification - D2632.

  


 

Jack No. 95B

4, 1-way flush mounted Jack used with Plug No. 420.

Colours: Ivory and Grey.

Terminals 1 to 4 connect to the plug whilst terminals 4 and 4A consist of a switch that breaks when the plug is inserted.

Drawing - 92282.

 


 

Jack No. 96A

5, 1-way surface mounted jack used with Plug No. 505.

On the model shown the cover is released by squeezing the sides.  Earlier models were fixed by two screws.

Colours: Ivory and Grey.

Terminals 1 to 5 connect to the plug whilst terminals 5 and 5A consist of a switch that breaks when the plug is inserted.

Drawing - 91497.

 


 
Jack No. 96B and 96C

5, 1-way flush mounted Jack used with Plug No. 505.

Colours: Ivory and Grey.

Terminals 1 to 5 connect to the plug whilst terminals 5 and 5A consist of a switch that breaks when the plug is inserted.

The No. 96C was fitted with an additional earth terminal to allow a Protector No. 17A to be connected when required. First use Prestel installations.

Drawings - 91497 (No. 96A), 92283 (No. 96B) and 94426 (No. 96C).

 .


 
Jack No. 97

34-way strip type jack used on Panel, Mountings.

Used on Equipment, Signalling WB400.

Uses a Plug No. 3206.

Drawing - CD1615. 

 

 
Jack No. 98

32-way jack.

Variable spring combinations - 98A to 98Q.

Used with the Plug No. 3207.

Drawings - 92020, 92045 and 92046.

 
 
Jack No. 99A and 99B

3-point jack with 3 break contacts.

Used with a Plug No. 316.

Drawing - CD1929.

 
 
Jack No. 121

8, 1-way jack used with Panel, Mountings. 

Uses a Plug No. 804.

Drawing - CD1615.

 

 
Jack No. 122

4, 2-way jack used on 2000 type racks for signal isolation purposes with Peg. No. 55.

Drawing - 64967.

  

 
Jack No. 123

32-way jack.  See diagram for spring configuration of the Jack No. 123A to 123Q.

Used with the Plug No. 3207.

Drawing - 92308.

 

 
Jack No. 124

32-way jack.

Ericsson part N108246A.

Drawing - 92455. 

 
 
Jack No. 125

32-way jack.  See diagram for spring configuration of the Jack No. 125A to 125Q.

Used with the Plug No. 3210.

Used on the PABX No. 6.

Drawings - 92507 and 92508.

 
 
Jack No. 126

Used on the Confraphone Network.

Made by Render Intruments Ltd.

Drawing - CD2200.

Diagram - N4443.

 
 
Jack No. 127

64, 1-way jack.

Ericsson part N200013A1.

Used with Plug No. 3211.

Drawings - 93111 and 93112. 

 
 
Jack No. 128

64, 1-way jack.

Ericsson part N200013B1.

Used with Plug No. 3211.

Drawing - 93113 and 93114. 

 
 
Jack No. 129

32, 1-way jack used on telephone exchange equipment mountings.

Accepts Plugs No. 3201.


 
 
Jack No. 137A

2, 1-way plastic jack, for use with Batteries. Secondary Nos. 22 and 23 in Telephones No.764.

Connects to a Plug No. 243A.

Drawing - CD2648.

 



 
Jack No. 138A

5, 1-way jack with two break contacts  on 4 and 5.

A surface mounted jack, constructed of a grey coloured plastic.

Used on the Box, Coin Collecting No. 735.

Dimensions - 3.38" x 2.2" x 1.27".

Drawing - CD93410. 

 

 
Jack No. 139A

Used on the Bell-Unit No. 766, where the cord anchor block (Part l/DBL/124) is replaced by the Jack No. 139A when used on a Plan 4 installation.

For more details see the Telephone No. 776.

Drawing - CD2668.

Specification - S1262. 

 
 
Jack No. 140A

A jack to accept one plug.

Drawing - 93649. 

 
Jack No. 141A

A jack to accept two plugs.

Drawing - 93648. 

 
Jack No. 143A

32, 1-way jack, mounted an a bracket.

Used with the Plug No. 3211.

Drawings - 93706 and 93707. 

 
Jack No. 144A

A 7-way jack that provides weather-proof connexion for Telephone service to boats, caravans, etc.

Used with Plug No. 702A.

This is a standard 7 pin car trailer socket.

Drawings - 93759 and 93761.

 

 
Jack No. 145A

A jack with six contact springs and six break springs.

For general use in panels.

Uses a Plug No. 620A.

Drawing - 93810.

 

 
Jack No. 146A

A jack with six Contact springs and an auxiliary 2 changeover contact unit.

For general use in panels.

Uses a Plug No. 620A.

Drawing - 93812.

 

 
Jack No. 147A

A jack fitted with a 4 way WE type socket.

Used on the early Herald SBS terminals.

Coloured brown. 

  



 
Jack No. 148A

A Jack used with the Plug No. 133A

Drawing - 94449. 

 

 
Jack No. 149A

A Jack used with the Plug No. 149A.

Drawing - 94448.

 

 
Jack No. 200B/6

Single Jack, with an un-threaded bush, fixed by a wood screw.

2 point for B gauge plugs.

Uses a Plug No. 316.

Size - 86mm x 22mm x 19mm.

Drawing - 61061.

  

  

Jack No. 200B/6N

Single Jack, with a threaded bush, fixed by a nut and washer.

2 point for B gauge plugs.

Uses a Plug No. 316.

Size - 86mm x 22mm x 19mm.

Drawing - 61061.

 


 
 
Jack No. 201BN

A Jack No. 200B6 on an Ebonite mounting.

Engraved "Battery jack".

Used with B gauge plugs.

Size - 86mm x 41mm x 29mm.

Drawing - 61084.

 




 
Jack No. 201BO

As Jack No. 201BN but the oak plate is un-engraved.

Drawing - 61084.

 



 
Jack No. 300B6

Single Jack as per Figure, with an un-threaded bush, fixed by a wood screw.

Size - 14mm x 21mm x 85mm.

Plessey Part - N5061.

3 point for B gauge plugs.

Size - 86mm x 22mm x 19mm.

Drawing - 61061.


 


 

Jack No. 300B/6N

Single Jack, fixed by a nut and washer.

2 point for B gauge plugs.

Uses a Plug No. 316.

Size - 86mm x 22mm x 19mm.

Drawing - 61061.

 






 
Jack No. 301BN

Single Jack No. 300B6 with a face plate for three wood screws.

Uses a Plug No. 316.

Drawing - 61085. 




 
 
Jack No. 303BP

Three Jacks No. 300B6 fitted in a surface mounted hardwood casing. Case is painted black.

The two springs on each jack are commoned to two screw tags.

Drawing - 62316.

  

 
Jack No. 306MN

Three plug socket with 6 springs.  4 springs have break contacts.

Used on the Panel, Telegraph No. 11A.

Drawing - 94381.

 
 
Jack No. 307MN

20 way Jack-strip comprising of the following:-
Positions 13, 14, 15, 18, 19 & 20, Jacks to Fig 1. 6 x Parts 1/DJA/18.
Position 16, Jack to Fig 2.  1 x Part 4/DJA/18.
Position 17, Jack to Fig 3.  1 x Part 1/DJA/17.
Positions 1 to 12 are dummies.  12 x Parts 1/DJA/12.

Used on the PMBX No. 4/1A.

Colour - Light French Grey.
Markings - None.

Ericson Code No. N5169AA3.

Drawing - 92543.
 


Fig 1


Fig2


Fig3
 

Jack No. 308

Jack used on Panel, Telegraph No. 112A.

Two springs and a metal sleeve.

Drawing - 94379. 

 
 
Jack No. 309

Jack used on Panel, Telegraph No. 112A. 

Two springs and a metal sleeve, plus a make contact set.

Drawing - 94380.

 
 
Jack No. 310BN

10 way Jack-strip with Jacks as per figure.

Consists of 10 x Jacks No. 300B1.

Un-numbered and without spots.

Switchboard B gauge.

Uses a Plug No. 316.

To fit Panel width - 260mm.

Uses a Label No. 86A.

Plessey Part - N5171.

Drawing - 60896.

   

 

Jack No. 310BP

10 way Jack-strip.

Consists of 10 x Parts 2/DJA/12 (dummy) and 10 x Parts 1/DJA/18 (2 springs and sleeve).

Uses a Plug No. 316.

To fit Panel width - 260mm.

Drawing - 92543.

 
 
Jack No. 310MP

10 jacks, housed in a wooden case, used on the Tester TL1635.

It is an adaptor for testing switchboard cords of all gauges.

Drawing - 60917.

  


 
Jack No. 311

Jack used on Panel, Telegraph No. 113A. 

Two springs, each with a break contact and a metal sleeve.

Drawing - 94443.

 
 
Jack No. 312

Jack used on Panel, Jack No. 6A. 

Four springs each with a break contact and two metal sleeves.

This jack is operated by two plugs.

Drawing - 88020.

 
 
Jack No. 313

Jack used on Panel, Jack No. 6A. 

Six springs each with a break contact and three metal sleeves.

This jack is operated by three plugs.

Drawing - 88029.

 
 
Jack No. 320BN

20 way Jack-strip with Jacks as per figure for B gauge plugs.

Consists of 20 x Jacks No. 300B1.

Numbered 0-9 and 0-9 and with spots.

To fit Panel width - 260mm.

Plessey Part - N5172.

Drawing - 60896

 






 
Jack No. 320BP

20 way Jack-strip with Jacks as per figure for B gauge plugs.

Consists of 20 x Parts 1/DJA/18 (2 springs and sleeve).

Numbered 0 to 9 and 0 to 9 with spots.

To fit Panel width - 260mm.

Plessey Part - N5172.

Drawing - 60896.

   

 
Jack No. 320BQ

20 way Jack-strip with Jacks as per figure for B gauge plugs.

Consists of 20 x Parts 1/DJA/18 (2 springs and sleeve).

Un-numbered and without spots.

Dimensions - 262mm long x 12.7mm high.

Drawing - 93753.

  

 
Jack No. 320CO

20 way Jack-strip with Jacks as per figure for B gauge plugs.

For G.E. Co.'s installations only.

Numbered 0-9 and 0-9 with spots.

Dimensions - 262mm long x 12.7mm high.

 






 
Jack No. 500A

Single Jack, with un-threaded bush, fixed by two wood screws. Contacts as per Figure.

5 point for B gauge plugs.

Superseded by the Jack No. 500B6.




 
 
Jack No. 500B2

Single Jack, with un-threaded bush, fixed by two wood screws. Contacts as per Figure.

5 point for B gauge plugs.

Size - 14mm x 21mm x 85mm.

Plessey Part - N5063.

Drawing - 61061.

  






 
Jack No. 500B6

Single Jack, with an un-threaded bush, fixed by a single wood screw. 

 Contacts as per Figure.

5 point for B gauge plugs.

Size - 14mm x 21mm x 85mm.

Plessey Part - N5063.

Drawing - 61061.

  






 
Jack No. 500B6N

Single Jack, with an un-threaded bush, fixed by a single wood screw.  Contacts as per Figure 1.

5 point for B gauge plugs.

Size - 14mm x 21mm x 85mm.

Plessey Part - N5063.

Drawing - 61061. 

  

Jack No. 501BO

Jack as per 500B6 but with fixing plate for three wood screws.

A Jack No. 301BN is shown pictured, the only difference being the additional break contact on each spring on the No. 501BN.

Used with B gauge plugs.

Drawing - 60896

  



  
Jack No. 505AQ

This is five Jacks No. 500A at 2.25" centres on a 14" x 1.75" mounting.

Fitted with Labels No. 18 Black.

Used on Concentrator, Switchboards 20, 40 and 60 lines.

  

 
Jack No. 505BN

This jack consists of five Jacks No. 500B1.

Uses Labels No. 87.

  



 
Jack No. 505BR

This jack consists of five Jacks No. 500B6.

Uses Labels No. 87.

Drawing - 61086.

 
 
Jack No. 505BS

5 way Jack-strip comprising of the following:-
Positions 2, 4, 6, 8, 10, Jacks to Fig 1.  5 x Parts 2/DJA/18.
Positions 1, 3, 5, 7, 9, 11, 13 to 20 are dummies.  15 x Parts 1/DJA/12.

Used on the PMBX No. 4/1A.

Used with B gauge plugs.

Colour - Light French Grey.

Markings - None.

Ericson Code No. N5169AA2.

Drawing - 92543.



Fig 1
Jack No. 510BN

10 way Jack-strip with Jacks No. 500B1.

Used with B gauge plugs.

To fit Panel width - 260mm.

Uses Labels No. 87.

Superseded by the Jack No. 510BO.

 

 
Jack No. 510BO

10 way Jack-strip with Jacks No. 500B1 with contacts as per figure.

Un-numbered and without spots.

Used with B gauge plugs.

To fit Panel width - 260mm.

Uses Labels No. 86A.

Plessey Part - N5173.

Drawing - 60896.

  






 
Jack No. 510BS

This jack consists of ten Jacks No. 500B6.

Used with B gauge plugs.

Uses Labels No. 87.

Drawing - 61086.

 

 
Jack No. 510BU

10 way Jack-strip comprising of the following:-
Positions 2, 4, 6, 8, 10, 12, 14, 16, 18 20 are jacks.  10 x Parts 2/DJA/18.
Positions 1, 3, 5, 7, 9, 11, 13, 15, 17, 19 are dummies.  10 x Parts 1/DJA/12.

Un-numbered and no spots.

Used with B gauge plugs.

To fit Panel width - 262mm.

Drawing - 92543.

 
 
Jack No. 510BV

10 way Jack-strip comprising of the following:-
Positions 2, 4, 6, 8, 10, 12, 14, 16, 18, 20 are dummies.  10 x Parts 2/DJA/12.
Positions 1, 3, 5, 7, 9, 11, 13, 15, 17, 19 are jacks.  10 x Parts 3/DJA/18.

Un-numbered and no spots.

Used with B gauge plugs.

To fit Panel width - 262mm.

Drawing - 92543.

  
 
Jack No. 510BW

10 way Jack-strip. Each jack has an additional break contact associated.

Used with B gauge plugs.

Used on the PMBX 4.

To fit Panel width - 262mm.

Drawing - 93755.

 
 
Jack No. 520BN

20 way jack-strip with Jacks No. 500B1.

Used with B gauge plugs.

To fit Panel width - 260mm.

 


 
Jack No. 520BP

20 way jack-strip with jacks as per figure.

Numbered 0-9 and 0-9 and with spots.

Used with B gauge plugs.

To fit Panel width - 260mm.

Plessey part - N5174.

Drawing - 60896.

  


  

Jack No. 520BS

20 way Jack-strip comprising of the following:-
Positions 1 to 20 are jacks.  20 x Parts 3/DJA/18.

Jacks are numbered 0 to 9 and 0 to 9 with spots.

Used with B gauge plugs.

To fit Panel width - 260mm.

Drawing - 92543.

  
 
Jack No. 520BT

20 way Jack-strip comprising of the following:-
Positions 1 to 20 are jacks.  20 x Parts 5/DJA/18.

Jacks are numbered 0 to 9 and 0 to 9 with spots.

Used with B gauge plugs.

To fit Panel width - 260mm.

Plessey part - N5174.

Drawing - 92543.

 
 
Jack No. 520BU

20 way Jack-strip with Jacks as per figure.

Used with B gauge plugs.

Dimensions - 11.28" x 3.5" x 0.5".

Drawing - 93325.

 
 
Jack No. 520BV

20 way jack-strip with each jack having one associated break contact set.

Used on the PMBX No. 11.

Un-numbered with no spots.

Used with B gauge plugs.

Dimensions - 262mm long x 12.7mm high.

Drawing - 93753.

 
 
Jack No. 524BN

24 way Jack-strip with Jacks as per figure.

Used with B gauge plugs.

Dimensions - 12.28" x 3.55" x 0.5".

Ericsson part N24605A.

Drawing - 93325.

 
 
Jack No. 524BO

24 way Jack-strip with Jacks as per figure.

Used with B gauge plugs.

Dimensions - 13.28" x 3.5" x 0.5"

Drawing - 93325.

 
 
Jack No. 532BN

32 way Jack-strip with Jacks as per figure

Used with B gauge plugs.

Dimensions - 17.28" x 3.5" x 0.5"

Drawing - 93325.

 
Jack No. 601A

6, 1-way PCB mounted jack - Right hand.

Used with the Plug No. 431A.

Drawing - 88007.

Click here for more information

  

 
Jack No. 602A

6, 1-way PCB mounted jack - Left hand.

Used with the Plug No. 431A.

Drawing - 88008.

Click here for more information

  

 
Jack No. 603A

6, 1-way PCB mounted jack - Right hand - 90 degree.

Used with the Plug No. 431A.

Drawing - 88008.

Click here for more information

  



Jack No. 604A

Twin 6, 1-way Line Jack for telephones, Panel clip in PCB mounting.

Used with the Plug No. 431A.

Drawing - 88058.

 
 
Jack No. 605A

Twin 6, 1-way PCB mounted jack - Right hand.

Used with the Plug No. 431A.

Drawing - 88028.

Click here for more information

  



 
Jack No. 606A

6, 1-way PCB mounted jack - Right hand.

Used with the Plug No. 431A.

  



 
Jack No. 611A

6, 1-way PCB mounted jack - Left hand - 90 degree.

Click here for more information

  

 
Jack No. 612A

6, 1-way PCB mounted jack - Left hand.

Click here for more information

  

 
Jack No. 620A

Surface mounted Master socket with captive lid.

Fitted with a 1.8uf capacitor, a lightning protector and a resistor.

Used on the UK Plug and Socket system.

Used with the Plug No. 431A.

Made by GEC in 1981.

Click here for more information

   

Jacks No. 621A

Surface mounted Master socket with non-captive lid.

Fitted with a 1.8uf capacitor, a lightning protector and a resistor.

Used on the UK Plug and Socket system.

Used with the Plug No. 431A.

Click here for more information
 


 
 
Jacks No. 622A

Surface mounted Secondary socket with captive lid.

No components are fitted in this Jack.

Used on the UK Plug and Socket system.

Used with the Plug No. 431A.

Click here for more information


  


 
 
Jacks No. 623A

Surface mounted Secondary socket with non-captive lid.

No components are fitted in this Jack.

Used on the UK Plug and Socket system.

Used with the Plug No. 431A.

Click here for more information
 

  


 
 
Jacks No. 625A and 625C

Surface mounted jack used on the early Herald SBS telephones.

Western Electric type connector.

Cover is coloured brown.

  



 
Jack No. 700B1

Single Jack, with an un-threaded bush, fixed by one wood screw.  Contacts as per Figure.

Uses a Plug No. 316.


 
 
 
Jack No. 700B6

Single Jack, with metal frame, as per Figure.

Fixed through frame with wood screw.

Size - 14mm x 21mm x 85mm.

7 point for B gauge plugs.

Uses a Plug No. 316.

Plessey Part - N5065.

Drawing - 61061.

   


 

   

Jack No. 710BN

This jack consists of ten Jacks No. 700B1.

Numbered 0-9.

For Section, Switch, B.E., C. B. Multiple No. 9 only.

Uses the Plug No. 316.

Uses Labels No. 105.

  
 
Jack No. 710BO

This jack consists of ten Jacks No. 700B6.

Uses Labels No. 87.

Drawing - 61086.

 


 
Jack No. 710BR

10 way Jack-strip, comprising of Jacks No. 700B1 in the following:-
Positions 2, 4, 6, 8, 10, 12, 14, 16, 18 & 20, Jacks to Fig 1.  10 x Parts 4/DJA/18.
Positions 1, 3, 5, 7, 9, 11, 13, 15, 17 & 19 are dummies.  10 x Parts 1/DJA/12.

Un-numbered and no spots.

Used with B gauge plugs.

Uses a Plug No. 316.

Used on the PMBX No. 4 - Extension Units No. 1 and 2.

Colour - Light French Grey.
Markings - None.

Ericson Code No. N5169AA1.

Drawing - 92543.

  


Jack No. 710BS

10 way Jack-strip used on the PMBX No. 4/1A.  Each jack has a break contact associated with each spring.

Un-numbered and no spots.

Dimensions - 262mm wide.

Uses the Plug No. 316.

Drawing - 93755.

 
 
Jack No. 720

A single Jack with two springs which each operate a break contact set.

Used with B gauge plugs.

Uses a Plug No. 316.

 
 
Jack No. 720BN

20 way Jack-strip, using Jack No. 700B1, for Section, Switch, B.E., C.B. Multiple, No. 9 only.

Numbered 0-9 and 0-9 and spotted.

Uses the plug No. 316.

Dimensions - 10.5" x 11.72".

 
 
Jack No. 720BO

20 way Jack-strip comprising of the following:-
Positions 1 to 20 are jacks.  20 x Parts 4/DJA/18.

Jacks are numbered 0 to 9 and 0 to 9 with spots.

Used with B gauge plugs.

Used on the PMBX 4 - Extension, Units No. 3 and 4

To fit Panel width - 260mm.

Drawing - 92543.

  
 
Jack No. 720BP

20 way Jack-strip comprising Jacks No. 720.

Un-numbered with no spots.

Used with B gauge plugs.

Used on the PMBX No. 11.

Colour - Light French Grey.
Marking - none.

Dimensions - 262mm long x 12.7mm high.

Drawing - 93753.

 
 
Jack No. 720BQ

20 way Jack-strip comprising Jacks No. 720.

Numbered 0 to 9 and 0 to 9 with spots.

Used with B gauge plugs.

Used on the PMBX No. 11 - Extension, Units No. 1 to 8.

Colour - Light French Grey.
Markings - numbered 0-9 and 0-9 and spotted.

Dimensions - 262mm long x 12.7mm high.

Drawing - 93753.

 
 
Jack No. 720BR

20 way Jack-strip comprising Jacks No. 720 of the following:-
Positions 1 to 20, Jacks to Fig 1.

Used with B gauge plugs.

Uses Plug No. 316.

Colour - Light French Grey.
Markings - None.

Ericson Code No. N5169AA4.

Drawing - 92543.

  


Fig 1
Jack No. 800A

A single jack, with un-threaded bush, fixed by two wood screws.

 superseded by the Jack No. 800B6.

Used with Plug No. 316.

  
 


 
 
Jack No. 800B1

A single jack, with an un-threaded bush, fixed by a single wood screw.

Used with Plug No. 316.

Superseded by the Jack No. 800B6.

 
 
Jack No. 800B2

A single jack, with an un-threaded bush,  fixed through the frame by two wood screws.

Uses Plug No. 316.

 



 

 
Jack No. 800B6

Single Jack, with an un-threaded bush, fixed by a single wood screw.

Contacts as per Figure.

Size - 14mm x 21mm x 85mm.

8 point for B gauge plugs.

Uses Plug No. 316.

Superseded the Jack No. 800B1.

Plessey Part - N5066.

Drawing - 61061.

 




 
Jack No. 800B6/N

Single Jack with a threaded bush, fixed by a nut and washer.

Contacts as per Figure.

Fixing is by means of a nut and washer

8 point for B gauge plugs.

Uses Plug No. 316.

Drawing - 61061.

  






 
Jack No. 801BN

A single Jack No. 800B6 attached to a fixing plate with holes for three wood screws.

Uses a Plug No. 316.

 


 
Jack No. 805BN

This jack consists of ten Jacks No. 800B6.

Uses Labels No. 87.

Dimensions - 13.125" long

Drawing - 61086.

  
 
Jack No. 810BN

10 way Jack-strip with Jacks No. 800B1 as per figure.

Un-numbered and without spots.

To fit Panel width - 260mm.

Used with B gauge plugs.

Uses Labels No. 86A.

Plessey Part - N5175.

Drawing - 60896.

  






 
 
Jack No. 810BQ

10 way Jack-strip, comprising of the following:-
Positions 2, 4, 6, 8, 10, 12, 14, 16, 18 & 20, auxiliary switches (changeover).  10 x Parts 2/DJA/17.
Positions 1, 3, 5, 7, 9, 11, 13, 15, 17 & 19 are jacks.  10 x Parts 3/DJA/18.

To fit Panel width - 260mm.

Used with B gauge plugs.

Drawing - 92543.

 
 
Jack No. 831A

A jack that accepts the Plug No. 831A.

Drawing - 88133.

 
 
Jack No. 910B

For Section, Switch B.E. C.B. Multiple No. 9 only.

Uses the Plug No. 316.

  

 
Jack No. 910BN

A jack-strip consisting of ten Jacks No. 900B.

For Section, Switch B.E. C.B. Multiple No. 9 only.

Uses the Plug No. 316.

Superseded by Jack No. 910BO.

  

 
Jack No. 910BO

For Section, Switch B.E. C.B. Multiple No. 9 only.

Consists of Jacks No. 810BN modified by special front strip, additional spring and strapping of tags 3 and 9.

Uses the Plug No. 316.

  

 
Jack No. 1031A

A jack that accepts the Plug No. 1031A.

Drawing - 881371.

 
 

 

 
 
BACK Home page BT/GPO Telephones Search the Site Glossary of Telecom Terminology Quick Find All Telephone Systems

Last revised:

FM