Hi all,

Anyone able to identify what this bit of Elcom electronics kit might be?

Front/rear:

White cable (phone line?) and a barrel plug (no voltage specified), 120 cm antenna and an unfamiliar connector with 2 different-size holes:

Sticker and internals:

The closed matches I get on the first half of the FCC number BF7871 are modems from other brands, but I have no idea if that part indicates an FCC category.

Would love to know if you have any suggestions!