While cleaning up the office today we ran across two odd looking cables still in bags. On one end is a female DB 9 connector and the other end is a 3.5mm plug with 4 contact points. The types of equipment we have are: Dell workstations and servers, HP SANs, Equallogic SANs, Cisco network gear, and symmetricom time servers.
The only thing I found on the net is a speakercraft adapter cable but we've never had anything to do with speakercraft.
UPDATE: We don't have any cameras or video/audio equipment in the area. It can't possibly be for a camera, cell phone, or some other home consumer item since we just can't have that stuff in the area.