Ever since Nortel’s Voice Product Line were sold off to Genband ( http://www.genband.com/media-center/press-releases/genband-selected-acquire-nortels-cvas-assets ) and Avaya ( http://www.avaya.com/usa/about-avaya/newsroom/news-releases/2009/pr-091218/ ) in 2010, finding parts to keep your DMS switches working has been hit and miss.
TruePulse has a huge selection of DMS-10, DMS-100, DMS-250 and DMS-500 modules and parts. For example, we just received a J2427A-1 L3, which is a 20 amp Rectifier for a DMS-250. Let us know if you need it.
To get a better idea of what we can supply, please browse our catalogue at http://www.truepulse.com/catalog/browse/
Other DMS links that you may find helpful: