Statens Järnvägar: Telefonanläggningar i Stockholm 1877 - 1946

In 1946 the swedish state railways issued this publication in connection with the installation of a new PABX in Stockholm. The evolution of state railway telephony in Stockholm is traced, from the first four subscriptions to the Bell Company network in 1880, the first manual exchange with 36 extensions in 1889 and the first PABX in 1936. Long-distance telephony with Western Electric selector technology was introduced in 1916. Special arrangements for the enquiry office and for sleeping car reservations are also covered.