Part Number: 10001971 (Ne) Part Number: 100-01971-AO (Addon calix 100-01971 compatible) Part Number: 10001972 (Ne) Part Number: 100-01972-AO (Addon 100-01972 comp sfp taa xcv) Part Number: 10001973 (Ne) Part Number: 100-01973-AO (Addon 100-01973 comp sfp taa xcv) Part Number: 10001979 (Parts kit,leaf spring assembly) Part Number: 10-00-1980-1214 (No description) Part Number: 10-00-1980-1298 (Chomerics 10-00-1980-1298) Part Number: 10001980800G (No description) Part Number: 10001980E6434 (No description) Part Number: 1000-198-1 (Connector receptacl) Part Number: 10-00-1981-1285 (New and original) Part Number: 10-00-1981-1287 (Connector accessory)