Telephony 101: Key Telephone System (KTS)

The first on site customer systems was the PBX, but later on in the 1920s into the 1930s, brought a specific solutions to customers, called the Key Telephone System.

The “key” to this was to have hard wired lines for users who wanted to get to someone directly. This also fused with Intercom systems, acting as a separate “service” for the time. Intercoms for this context was a private circuit to enable telephone calls to work within the system. Most often, the Intercom line was on the fifth button of say a 564 telephone.

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POTD: New Hobby Lobby

img9912 This newer version of the NEC Electra Key Telephone was found at a local Hobby Lobby that had recently opened. Hobby Lobby is basically the K-Mart of arts and crafts stores. Their footprint is probably quadrupled compared to an AC Moore or Michaels. Coincidentally the stores that Hobby Lobby filled in my area were former KMart stores. Other stores in the area use this system.