BPO Private Manual Branch Exchange
(PMBX) MENU


General information and description of PMBX's

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NT SWITCHBOARDS
SECTION SWITCH BE CB No. 9
SWITCHBOARD AT 1810 - (Automatic variant of CB887)
SWITCHBOARD AT 3718
SWITCHBOARD AT 3796 - (10+50)
SWITCHBOARD CB 873 - (5+20)
SWITCHBOARD CB 887
SWITCHBOARD CB 935 - (Cordless)
SWITCHBOARD CBS 364 - (Cordless on CBS No. 1 systems)
SWITCHBOARD CBS 484 - (Cordless on CBS No's 2 & 3 systems)
SWITCHBOARD LD 90 - (Magneto System)
SWITCHBOARD N 1070 - (10+50)
SWITCHBOARD RP3751 - (Exchange speaker system)
SWITCHBOARD TL597
PMBX No. 1
PMBX No. 2
PMBX No. 3
PMBX No. 4
PMBX No. 11
PMBX No. 12
Abbreviations

A.T. - Automatic
B.E. - Branch Exchange
C.B. - Common Battery
C.B.S. - Common Battery Signalling
D.C. - Double Cord
F.P. - Floor Pattern
L.B. - Local Battery
N.T. - National Telephone Co.
S.C. - Single Cord
T.E. - Telephone Exchange
W.P. - Wall Pattern 

 
 
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Last revised: September 02, 2018

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