This mixed-media network module has one Ethernet port, one Token Ring and two user-configurable WAN Interface Card WIC expansion slots. The Ethernet connection is via an Ethernet AUI DB-15 connector or 10BaseT RJ-45 connector. The Token Ring connection is via an STP or UTP connector. The supported WICs include the 1-port serial WIC-1T, 1-port ISDN BRI with ST and U interfaces WIC-1B-S/T, WIC-1B-U, 1-port 56 kbps DSU/CSU WIC-1DSU-56K4, and 1-port T1/FT1 DSU/CSU WIC-1DSU-T1.