Eugene:

     IIRC, the KG-84 was an encryption apparatus that was used with the old (pre-TCP/IP) high-speed (1.544 Mbps) digital telephone lines. Don't ask me how I know. The cabinet is red because it handles unencrypted data. "Black" would indicate relatively safely-handled encrypted data. 

73 de 

Gene Smar AD3F 

Sent from my Radio Shack TRS-80 model 100 laptop

On Wed, Feb 8, 2023 at 3:26 PM, W2HX

<w2hx@w2hx.com> wrote:

Dunno exactly what this is, but I found it interesting

https://www.ebay.com/itm/154226873712

73 Eugene W2HX

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