PABX SYSTEMS
(MECHANICAL AND ELECTRONIC)


These systems were all maintained by the Post Office/BT before liberalisation. BT/GPO/PO P.A.B.X.'s were originally only rented but around the early 1980's were offered for sale.  The year 1922 was the first one in which P.A.B.X.'s were generally introduced.  The "Official" P.A.B.X. has been in use since 1912, but it was in the nature of an experiment when first installed and the First World War hindered further developments of P.A.B.X.'s.

A.E. Co. 30/30 SYSTEM
ARD 562
ARD 562
ERICSSON TYPE A
GEC GPO TYPE
GEC REX80
GEC SL1
IBM 1750
IBM 2750
IBM 3750
ITT/STC UNIMAT 4080
PABX 1
PABX 2
PABX 3
PABX 4
PABX 5
PABX 6
PABX 7
PHILIPS EBX 8000
PHILIPS UH200 & UH900
PLESSEY EPB2000
PLESSEY PDX
R.A.T. - 24v and 32v Systems
SIEMENS BROTHERS TYPE 16 SYSTEMS
STC 4002
UNIT, AUTOMATIC No. 4 (STC 4002)


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Other administrations or private supply PABX's
A.E. Co. 20/50 SYSTEM
A.E. Co. 100/125 SYSTEM
ERICSSON TYPE B
STC 30 LINE
STC 100 LINE
STC 4200-D
STC 7020
STC 7030
STC 47001

 
 
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Last revised: June 18, 2022

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