1 x Expansion Slot - Expansion Module.A universal port can carry the equivalent of one DS0 of network traffic. The core hardware components are SPEs, each of which supports six universal ports. There are 54 SPEs per UPC, for a total of 324 ports per UPC. The current AS5800 universal access server can support up to 1344 modems. With the addition of the 324 port UPC card, the AS5800 can be populated with more than 2000 modems.