does anyone know what sfp module to use with the ie 2000 switch? i have tried Proline GLC-SX-MMD-CDW and Cisco GLC-SX-MMD= and they both dont seem to get me any connectivity. gbic-invalid is enabled as well. 

im hoping i can get some direction with my issue. i have installed 4 ie 2000 switches two 4 port, one 8 port and one 16 port. my four port switches are working fine with the fiber uplink but my 8 and 16 port swithces dont seam to get any uplink activ...