[1][2] Autocall was founded in 1908 by two businessmen from Shelby Electric Company after they witnessed a demonstration of a unique telegraph system in use at a plant for employee communication while on a business trip.

In 1920, an advertisement centered on the infamous Triangle Shirtwaist Factory Fire helped to gain the company significant business and began to establish them as a serious competitor in the industry.

In 1970, the company produced the NA series of fire alarm systems which utilized modular components driven by printed circuit boards instead of traditional hardwired relays.

In 1977, Autocall introduced Auto Monitor, an entirely solid-state multiplex system that utilized remote transponders to distribute IDC's and other connections.

Due to the rapidly growing clientele and increased complexity of programs, Autocall brought field programmability to its multiplex systems in the mid-1980s.

Autocall markets a complete line of Simplex manufactured fire protection products to independent dealers.

These notification appliances are capable of reducing wiring, undergoing "self testing", strobe candela choice from the FACP, and make it easy to add new signals.