This DSCM module is designed to compensate 20km NDSF fiber (standard SMF) dispersion and dispersion slope in Nortel metro and long haul transmission systems. Dispersion is about -290ps/nm/km at 1550nm. It may also compensate few other types of fibers. See manufacture test data at last 3 pdf links below. See model number info at the 1st pdf link below (full pdf file available upon request). See general dispersion compensation rule at page 44-48 and max insertion loss specification at the page 101 at the 3rd pdf link below (It works with Tx prechirp together for wider compensation range). See hardware including rackmount and drawer info at last pdf link below. Dispersion slope compensation modules (DSCM) compensate for the chromatic dispersion slope and dispersion accumulated after an optical fiber span of a given length. By deploying dispersion DSCMs and applying a new set of engineering rules, it is possible to extend the reach of Optical Metro 5200 systems beyond typical metro application distances. For more information on the Extended Metro DWDM solution, refer to the Network Planning and Link Engineering, 323-1701-110. With two SC/PC connectors.