Iwatsu IX-EXPME1 ECS Expansion Module 1 (Refurbished)Key Features: Provides 6 16 channel card slots for TDM Resource Expansion Adds expansion shelves 1, 2, 4, and 5 (Use Part #040024 IX EXPME2 to add expansion shelf 3 to the ECS system) Requires an IX EXPWS Power Supply (Part #040327), an IX EXPIFE1 Highway Interface Card (Part #040044) and an IX EXPMECBL Highway Interface Cable (Part #107579) Provides dedicated slots for IX DCDCM DC Power Supply and IX RNGUM Ring Generator ***NOTE: A Port License is