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Title
Modifications to Leeds Trunk Exchange Cord CCT
Reference
UK0108 NAEST 006/3
Date
17 March 1930
Scope and Content
Photostat copy of schematic drawing of modifications to the Leeds Trunk Exchange Cord circuit, initialled J R S and with pencil diagrams on reverse.
Physical description
Number of pieces: 1, Pages/folios: 1 p
Language
English.
Subject
Telephone exchanges
Conditions governing access
Open
Level of description
file

Hierarchy browser

110000001
NATIONAL ARCHIVE FOR ELECTRICAL SCIENCE AND TECHNOLOGY
contains 322 parts
- UK0108 NAEST 006
  Telephone Four Frequency Signalling System
  contains 9 parts
  - UK0108 NAEST 006/3
    Modifications to Leeds Trunk Exchange Cord CCT

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