Special Features:

C/o 4 terminal boards; 2 capacitors; 4 diodes; 2 resistors; 11 relays plus assorted hardware on a common mounting plate; used in wing command post command conference grouping

Properties:

A telephone circuit consisting primarily of telephone relays and other associated telephone equipment designed for use in terminating a line from a local telephone and in providing the telephone user with the facilities for signaling the switchboard operator.