Hi, I have some DEC cables that I peicked up. Does anyone know what they're for? Marked "BC-022D-10" also "82351-000" DB-25F on both ends estimate 10 foot long Marked "BC22D-50" also "71065" DB-25F on both ends, estimate 50 foot long Marked "BC22D-25" also "71065" DB-25F on both ends, estimate 25 foot long,NIB Thanks, Joe