KT1 & KT4 SERIES TELEPHONES
LD & MF VERSIONS
CONTENTS
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3513 300 05070
Technical Data
Introduction
Mechanical Construction
Principle of Operation
Circuit Descriptions
Basic LD (Loop Disconnect) Version
( 1 503) LD Version
Basic MF (Multi-Frequency) Version
( 1 503) MF Version
MF Mk2 Version with Discrete Timed Break Recall
( 1 503) MF Version with Discrete Timed Break Recall
Installation
British Telecom Plug 431 A
Block Terminal 52A
Western Electric Type Plug
Operation
Tone Caller
Dialling
Maintenance
Fault Finding
Spare Parts
Circuit Identification
KT1 Series Telephones Parts Lists
KT 4 Series Telephones Parts Lists
TABLES
FIGURES
KT 1
&
KT 4 Series Telephones - Principle of Operation
Basic LD Version - Circuit Diagram
1 503 LD Version - Circuit Diagram
Basic MF Version - Circuit Diagram
1 503 MF Version - Circuit Diagram
MF Mk2 Version with Discrete Timed Break Recall - Circuit Diagram
1 503 MF Version with Discrete Timed Break Recall - Circuit Diagram
Timed Break Period V Resistor Value, KT1
&
KT4 MF DTBR Version
Installation Details of Connectors
KT 1 Wall Bracket Assembly Parts Details
KT 1 Series Base Instrument Parts Details
KT1 Series Handset Parts Details
KT 4 Series Base Instrument Parts Details
KT 4 Series Handset Parts Details
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