SpartaCom MPWS (for WinFrame Server) - Version 1.0 SpartaCom Modem Pooling for WinFrame® Server (MPWS) is an add-on software product for the Citrix® WinFrame product line. SpartaCom MPWS gives WinFrame Clients access to modem pools defined on the WinFrame Server, saving both time and money by eliminating the need to reconfigure the communication application before each session.