Pair of TeleSciences 606 network termination modules/boards

Pair of TeleSciences terminator modules for an industrial communication network. These are marked "Telesciences 606 9435", "84D84008R05" and "MLN6621A-JOAAKU". They measure about 10.5" x 4.75" x 1.25". They are dated 1992.

These are from the estate of an industrial telecommunications engineer and ham radio enthusiast. We don't know much about them and we have not tested them.

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Item No. n25410