BPO Private Manual Branch Exchange
(PMBX) MENU

General information and description of PMBX's

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SECTION SWITCH BE CB No. 9
SWITCHBOARD AT 1810 
SWITCHBOARD AT 3718
SWITCHBOARD AT 3796
SWITCHBOARD CB 873
SWITCHBOARD CB 887
SWITCHBOARD CB 935
SWITCHBOARD CBS 364
SWITCHBOARD CBS 484
SWITCHBOARD N 1070
SWITCHBOARD RP3751
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: December 19, 2010

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