Card with 4 UPN system ports for system phones (OpenPhone 6x, 7x, Aastra 677x) and DECT RFPs (RFP 21 … 24); for slot 1 – 2 of the ExtensionSet 130, slots 1 – 3 of OpenCom 150(plus)/150rack, slots 1 – 2 of OC X320