PRIVATE AUTOMATIC EXCHANGES
This unit is similar in appearance to the switch-board K8396, but whereas the ultimate capacity of the latter is limited that of the individual unit, the K8397, beginning with as few as 25 lines, is capable of practically indefinite extension by the addition further units.
A 100-line switchboard comprises two 50-line units of the type illustrated, suitably inter-connected. When more than 100 lines are connected, Group Selector equipment is provided, in addition to the necessary line units. Being mounted in compact units of convenient size, the whole equipment can be arranged to occupy minimum floor space. It is mounted on a steel framework and enclosed in a floor pattern cabinet of well-seasoned polished hardwood. The glass-panelled front of cabinet is hinged and fitted with a lock. A lift-out panel is fitted at the rear so as to give easy access to the wiring, etc.
A twin conductor only is required to connect an instrument to the switchboard.
Instruments suitable for use with this switchboard are the K8384/5 and K8387/8.
Also found in the Peel Conner Bulletin No. 8 dated 1926 and the GEC Bulletin No. 8 dated 1928
Last revised: June 30, 2019