Lot 3 Pulsecom D4 Carrier System DSU-DPL4 All Rate Data Service units
Lot of three Hubbell / Pulsecom model DSU-DPL4 Dataport units. These modules have bar code stickers marked "D4D4BBBB". According to the instruction sheets these are "D4 Carrier System - DSU-DPL4 All Rate Data Service Dataports". The instructions are dated 1999.
There are three of these included on this lot, but one of them missed being included in the photos.
These are from the estate of an industrial telecommunications engineer and ham radio enthusiast. We don't know much about them, but we don't think that they've ever been used as two of them have protective plastic covers over the connections on the ends of the boards. We have not tested these and the boxes do have wear and soil from storage.