These switchboards are specially designed to meet the particular requirements of railways.
The sections are constructed of hard wood with ironwork fastened thereto for mounting apparatus
The keyboard is covered with fibre and has capacity for 17 cord circuits.
Lamps are used for line and supervisory signals.
A 24-volt battery floated by rectifier on a.c. mains is recommended for power supply.
Last revised: October 10, 2019