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Telecom Systems UK
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LINE JACK UNITS, VOICE JACK UNITS & DATA JACK UNITS, JACKS & JACK SOCKETS,
NETWORK TERMINATION EQUIPMENT (NTE), ADSL & VDSL FACEPLATES, ISDN2  AND HOME HIGHWAY ADAPTORS

 

Jacks Plugs and Sockets


     
 

plug_404.jpg (12619 bytes)

jack_65.jpg (52538 bytes)
Jack Plug No.404 (1957) Jack Socket No.65
     

     
BT 95A Jack Socket BT 96A Jack Socket

Jack Socket 95A (1972)

Jack Socket 95A Mk II(1985) Jack Socket 96A (1979)
  Item Code: 371170 Item Code: 371145
   

     
Jack Plug & Socket Jack Socket 84
Jack Socket 95B Jack plug 420 & socket Jack Socket No.84 (1976)
Item Code: 372402    
     

     
     
  Captive Jack No: 620A  
  Year: 1981  
These jacks were the early version of the Line Jack Unit (LJU)
     
Captive Jack No: 620A
(Master LJU 1/1A)
Item Code:
Non-Captive Jack No: 622A
(Secondary LJU 1/3A)
Item Code:
Non-Captive Jack No: 621A
(Master 1/1A)
Item Code:

 

Captive Jack No: 623A
(Secondary LJU 1/3A)
Item Code:
     

 
 

 
     
Fact-file: New style telephone plugs and sockets were introduced on 19 November 1981 to enable easy movement and convenient replacement of telephones.
 

 

 
Line Plugs

     
431A 631A
4-way line plug 431A diagram 6-way line plug 631A
     

Network Terminating Equipment (NTE)

   
BT/Openreach NTE5A Socket BT/Openreach NTE5A Socket
With integral bell circuit filter, latest version With integral bell circuit filter, later version
     

     
BT NTE5 Master LJU BT NTE5 Master LJU
BT/Openreach NTE5 Socket BT NTE5 Socket
With integral bell circuit filter, used from 2007 Item Code: 314444
   

     
BT NTE5 Master LJU BT NTE5 Master LJU
BT NTE5 Socket BT NTE5B Socket with blank detachable front
(early version) Item Code: 314678
   

     
NTE5 with Digital Access Plate NTE5 with Digital Access Plate    
BT NTE5 Socket with Digital Access Adaptor Plate  
For use with Home Highway  

Item Code: 265095

 
   

Cable Terminating Equipment (CTE)

     
Nynex NTE5 Nynex NTE5 Telewest CTE5 Master LJU
Nynex NTE5 Socket Telewest Cable CTE5
  View PCB                             View rear

       
Diamond CTE5 [Courtesy of Peter Duffield] NTL CTE5 Cable & Wireless CTE5
Diamond CTE5 NTL Cable CTE5 Cable & Wireless CTE5 Virgin Media CTE5
       

   
ADSL Splitter
       
NTE2000/2005 ADSL Filter & Splitter V1.0 NTE2000/2005 ADSL Filter & Splitter V2.0
Part No: 6010705    
Installation Notes    
     

NTE5 ADSL Filter & Faceplate (alternative design) I-plate
    view inside
       

   
       
       
       
BT Infinity / VDSL Faceplate Filter V1 BT Infinity / VDSL Faceplate Filter V2
Part No: 049579 Part No: 077005
       

     
External NTE [Courtesy of www.kitz.co.uk & A Eldridge] Since Dec 2008, BT Openreach have started to install external NTEs on new build properties. These new NTE housing boxes can terminate up to two copper pairs. Inside the grey NTE is a red tamper proof unit where the copper pair terminates and are connected to the box by an IDC labelled A and B. The external NTE unit contains a yellow plug which can be removed to disconnect the customer's wiring, for testing by an Openreach Engineer. External NTE [Courtesy of www.kitz.co.uk & A Eldridge]
  Data sheet (courtesy of Pressac)  
       
  External NTE  
       

Line Jack Units (LJU)

   
LJU1 Secondary LJU LJU1 Secondary LJU
LJU1/1A Master IDC  LJU1/3A Secondary IDC 
     

LJU1/3A Secondary IDC  LJU1/6A Secondary Screw
(later type with PCB housed in front)  
     

   
LJU2/1A Master LJU LJU2/1A Master LJU
   
LJU2/1A Master IDC LJU2/2A PBX IDC
Item Code: 373901 Item Code: 870448
       

       
   
LJU2/3A Secondary LJU LJU2/3 Secondary LJU
   

LJU2/3A Secondary IDC

LJU2/3C Secondary IDC (reversed)

Item Code: 373900 Item Code: 870127
   

       
LJU2/3A Secondary LJU LJU2/8A [Courtesy of Ian Jolly] LJU2/8A [Courtesy of Ian Jolly]
LJU2/6A Secondary Screw LJU2/8A IDC

 

Item Code: 877590

       

       
LJU3/1A Master LJU LJU3/1A Master LJU LJU3/3A Secondary LJU LJU3/3A Secondary LJU
LJU3/1A Master IDC

LJU3/3A Secondary IDC

Item Code: 373902

Item Code: 373904

   

       
  LJU3_3C_front.jpg (17414 bytes) LJU3_3C_rear.jpg (33631 bytes)  
LJU3/3C Secondary IDC (reversed)
Item Code: 870257
     

       
LJU4/1A Master LJU LJU4/1A Master LJU LJU4/3A Secondary LJU LJU4/3A Secondary LJU
LJU4/1A Master IDC

LJU4/3A Secondary IDC

Item Code: 373905 Item Code: 373907
   

       
LJU5/1A Master LJU LJU5/1A Master LJU LJU5/3A Secondary LJU LJU5/3A Secondary LJU
LJU5/1A Master IDC LJU5/3A Secondary IDC
Item Code: 373908 Item Code: 374300
       

       
   
   
  LJU5/6A Secondary Screw  
       
       
Specifications of Line Jack Units         Internal Wiring of a Master LJU
   

Voice Jack Units (VJU)

       
VJU2/1A VJU2/1A VJU2/3A VJU2/3A
VJU2/2A PABX/Master IDC VJU2/3A Secondary IDC
Item Code: 437997 & 438000/438001 (module)  Item Code: 437997
   

       
VJU3 VJU3/2A VJU3
VJU3/2A PABX/Master IDC VJU3/3A Secondary IDC
Item Code: 437998 & 438000/438001 (module) Item Code: 437998 
   

       
VJU4/1A VJU4/2A VJU4/3A VJU4/3A
VJU4/2A PABX/Master IDC VJU4/3A Secondary IDC
Item Code: 437999 & 438000/438001 (modules) Item Code: 437999
   

Data Jack Units (DJU) & Boxes

       
DJU4 DJU4 DJU5/3B DJU5/3B
DJU4/RJ45 (secondary) Combined Phone & RJ45 PC Network Socket DJU5/3B Double ISDN-2 Socket
   
Item No: 264457  
   

   
RJ45/RJ11 ADSL data extension socket RJ45 data sockets
 

     
Back Box 5A
Back Box No. 3 Back Box No. 5A Two jack sockets with IDC terminals mounted on Krone strip.
Item Code: 870130 Item Code: 870898  
For LJU3, 4 & 5 For NTE5  
     

For further information on New-Style wiring see the Wiring Page.


Line Terminating Units (LTU)
     
   
BT Signalling Unit 200A BT Private Wires Line Terminating Units Type: LTU38A
An analogue signalling unit for connecting external extensions or PBXs together over private circuits. Type: LTU15A

 

 
     

ISDN, Home Highway & Megastream Network Terminating Equipment (NTE)

   
BT Digital Wideband Adaptor [Courtesy of Alex Bird]
BT Megastream BT Digital Wideband Adaptor BT Megastream
Type: NTE2D Type: NTE4B Type: NTE52B
  Item Code: 292510  
     

   
NTE8 NTE8 ISDN2
BT ISDN-2e Adaptor BT ISDN2 Unit
Type: NTE8C Item Code: 376187
Item Code: 264703  
   

     
NTE9/01 NTE9 inside view NTE9/03 NTE9 inside view
       
BT Home Highway Adaptor BT Home Highway Adaptor
Type: NTE9B Type: NTE9C
Item Code: 265002 Item Code: 265002

View rear  View power supply  Further information   Later versions also have a USB socket fitted 

 

BT Kilostream Network Terminating Units (NTU)

 
NTU7 [Courtesy of Jim Stuart]
   
   
BT Kilostream Adaptor BT Kilostream Adaptor
Type: NTU6A Type: NTU7A
  Item Code: 292273
   

   
   
   
BT Kilostream Adaptor BT Kilostream Adaptor
Type: NTU8A Type: NTU11A
Item Code: 252089  
   

Specifications of Line Jack Units
LJU1 Item Code:  Dimensions: 55 mm x 55 mm x 25 mm
LJU1/1A   Master IDC Socket, with a capacitor, resistor and surge arrestor.
LJU1/2A   PABX Master IDC Socket, with a capacitor, but no resistor or surge arrestor.
LJU1/3A   Secondary (extension) IDC socket without any components fitted.
LJU1/4A   Master screw terminal version of LJU1/1A.
LJU1/5A   PABX Master screw terminal version of LJU1/2A.
LJU1/6A   Secondary screw terminal version of LJU1/3A
LJU2    Dimensions: 68 mm x 68 mm x 25 mm
LJU2/1A 373901 Master IDC Socket, with a capacitor, resistor and surge arrestor.
LJU2/2A 870448 PABX IDC Socket, with a capacitor & resistor, but no surge arrestor.
LJU2/3A 373900 Secondary (extension) IDC socket without any components fitted.
LJU2/3C 870127 Secondary (extension) IDC Socket is as a 3A but with reverse configuration (left latching), designed to accept 430/630 plugs rather than the normal 431/631 plugs.
LJU2/4A   Master screw terminal version of LJU2/1A.
LJU2/5A   PABX screw terminal version of LJU2/2A.
LJU2/6A   Secondary screw terminal version of LJU2/3A
LJU2/7A   Master for a table top payphone (contains an earth connection for lightning protector)
LJU2/8A 877590 IDC Socket, for use with Telex machines (contains a surge arrestor, 15k resistor and a diode)
LJU3    Dimensions: 85 mm x 85 mm
LJU3/1A 373902 Master IDC Socket, with a capacitor, resistor and surge arrestor.
LJU3/2A   PABX IDC Socket, with a capacitor, but no resistor or surge arrestor.
LJU3/3A 373904 Secondary (extension) IDC socket without any components fitted.
LJU3/3C 870257 Secondary (extension) IDC Socket is as a 3A but with reverse configuration (left latching), designed to accept 430/630 plugs rather than the normal 431/631 plugs.
LJU3/4A   Master screw terminal version of LJU3/1A.
LJU3/5A   PABX screw terminal version of LJU3/2A.
LJU3/6A   Secondary screw terminal version of LJU3/3A
LJU4    Dimensions: 85 mm x 85 mm
LJU4/1A 373905 Dual Master IDC Socket for two separate lines, with capacitors, resistors and surge arrestors.
LJU4/3A 373907 Dual Secondary (extension) IDC socket for two separate lines, without any components fitted.
LJU4/4A   Dual Master screw terminal version of LJU4/1A.
LJU4/6A   Dual Secondary screw terminal version of LJU4/3A.
LJU5    Dimensions: 85 mm x 85 mm
LJU5/1A 373908 Twin Master IDC Socket for one line, with a capacitor, resistor and surge arrestor.
LJU5/3A 374300 Twin Secondary (extension) IDC socket for one line, without any components fitted.
LJU5/4A   Twin Master screw terminal version of LJU5/1A.
LJU5/6A   Twin Secondary screw terminal version of LJU5/3A.

LJU6A/B

   Dimensions: 24 mm x 17.5 mm
LJU6/1A   Master single socket outlet for mounting in office furniture, trunking or panels
LJU6/2A   PABX single socket outlet for mounting in office furniture, trunking or panels
LJU6/3A   Secondary single socket outlet for mounting in office furniture, trunking or panels
LJU6/1B   Master single socket outlet for mounting in office furniture, trunking or panels, with reverse configuration (left latching), designed to accept 430/630 plugs
LJU6/2B   PABX single socket outlet for mounting in office furniture, trunking or panels, with reverse configuration (left latching), designed to accept 430/630 plugs
LJU6/3B   Secondary single socket outlet for mounting in office furniture, trunking or panels, with reverse configuration (left latching), designed to accept 430/630 plugs

LJU6C/D

   Dimensions: 37.5 mm x 22 mm
LJU6/1C   Master single socket outlet for mounting in office furniture, trunking or panels
LJU6/2C   PABX single socket outlet for mounting in office furniture, trunking or panels
LJU6/3C   Secondary single socket outlet for mounting in office furniture, trunking or panels
LJU6/1D   Master single socket outlet for mounting in office furniture, trunking or panels, with reverse configuration (left latching), designed to accept 430/630 plugs
LJU6/2D   PABX single socket outlet for mounting in office furniture, trunking or panels, with reverse configuration (left latching), designed to accept 430/630 plugs
LJU6/3D   Secondary single socket outlet for mounting in office furniture, trunking or panels, with reverse configuration (left latching), designed to accept 430/630 plugs

LJU7

   Dimensions: 165 mm x 120 mm x 25 mm
LJU7/1A   Six master socket outlets wired from a 226 connector. Used for under carpet cabling systems or similar applications.
LJU7/2A   Six PABX socket outlets wired from a 226 connector. Used for under carpet cabling systems or similar applications.
LJU7/3A   Six secondary socket outlets wired from a 226 connector. Used for under carpet cabling systems or similar applications.

LJU8

   Dimensions: 215 mm x 165 mm x 25 mm
LJU8/1A   Twelve master socket outlets wired from a 226 connector. Used for under carpet cabling systems or similar applications.
LJU8/2A   Twelve PABX socket outlets wired from a 226 connector. Used for under carpet cabling systems or similar applications.
LJU8/3A   Twelve secondary socket outlets wired from a 226 connector. Used for under carpet cabling systems or similar applications.

LJU9

   
LJU9/3A   Single socket outlet wired into back of 226 connector for connecting telephones to multi wired systems. 

LJU10

   
LJU10/1A   Converts socket outlet to single jack and six screw terminals for cable. Terminals and jack wired in parallel.
LJU10/3A   Jack doubler for converting single socket outlet to double jacks wired in parallel.
LJU10/4A   Converts socket outlet to single jack and 4-way cord with 431A plug. Wired in series.
LJU10/5A   Converts socket outlet to single jack and 4-way cord with spade terminals. Wired in series.
LJU10/6A   Converts socket outlet to single jack and 6-way cord with 631A plug. Wired in series.
LJU10/7A   Converts socket outlet to single jack and 6-way cord with spade terminals. Wired in series.
LJU10/11A   Converts socket outlet to single jack and 6-way cord with spade terminals. 
LJU10/14A   Single line module, sometimes referred to as a RF3.  Designed to fit into a standard PSTN socket for LW/MW broadcast interference suppression and contains four chokes in leads 2, 3,4 and 5 of the PSTN plug.

LJU11

   
LJU11A   Plug in mastering component facility, captive or non-captive capability, surface fitting.

Fact-file: New-Style Jack Plugs & Line Jack Units were introduced in 1981    

Wiring Line Jack Units

Further information on Line Jack Units

 


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