This website attempts to provide a picture of the particular telephone arrangements provided at the Dean Forest Railway. These arrangements are based on those of the Post Office around the 50s and 60s as this is the general approach for the railway.

The site also attempts to record the basic telecom techniques in use at that time.

Most pages are also available in PDF form for accurate printing onto A4 paper. A link to the PDF will be found at the bottom of each page with this facility.

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DFR Related Pages

The Editor

The Team

DFR Telecoms Diary

 

Norchard Trunking Diagram

Norchard Final Selector Busying Relays

Norchard NU Tone for G/Selr Levels

Norchard Ring Back Circuit

Norchard 50 Volt Supply

 

Norchard PA Mains Control Equipment

Telecoms to PA Interconnection

222 Fire Warning System

Norchard Clocks

 

Parkend Exchange Photographs

Parkend Trunking Diagram

Parkend Line Cct, L/Finder and G/Selr

Parkend Final Selector Circuit

Parkend Final Selr Traffic Distributor

Parkend Incoming First Selector

Parkend NU Tone for G/Selr Levels

Parkend O/G Junction Relay Set

Parkend B/W Junction Relay Set

Parkend Ring Back Circuit

Parkend S and Z Pulse Generator

Parkend Power Unit

Parkend Ringer and Power Control

Parkend Alarm Circuits

Basic Telecoms Information Pages

Dial Telephones
Main Distribution Frames
Distribution Cabling
Records

Jumpering a New Line

Line Testing

Railway "D" Phones

Post Office Relays

 

Intoduction to Strowger

Subscriber's Uniselector

50 Point Linefinder

200 Outlet Group Selector

 

The UAX13 - Getting Dial Tone

The UAX13 - Dialling the First Digit

The UAX13 - Dialling the Last Two Digits

The UAX13 - Junction Relay Set

 

 

 

 

 

 

 

 

 

Contacts

Links