Here is a quick little teaser image to see if anyone can guess what it is.
It actually has labels on it, but I obscured them to make it more of a challenge.
The pen is just to provide a clue about its size.

Here is a quick little teaser image to see if anyone can guess what it is.
It actually has labels on it, but I obscured them to make it more of a challenge.
The pen is just to provide a clue about its size.

I think this "telephone adapter" is close enough to be called a winner. Both may be variants of Starlink 3800 VoIP Gateway.
The one I have is actually called a Telebox Personal VoIP Gateway. It has a PSTN line connector and a POTS telephone connector plus the USB connector. The indicators are for Power, PSTN and VoIP.
Congrats - here is your sleuthing award:

I cannot find anything about 'Starlink 3800' nor the specific one that you have, but I found a "Kinamax IP-UGB20" that looks the same. No idea who the OEM was, everyone's rebadging everything, and most of the information about this seems to have been lost to time.
I cannot find anything about 'Starlink 3800' nor the specific one that you have, but I found a "Kinamax IP-UGB20" that looks the same. No idea who the OEM was, everyone's rebadging everything, and most of the information about this seems to have been lost to time.