3Com Router 5000 and Router 6000 v2.41Module Guide Chapter 4 Flexible Interface Cards (Router 6000)4-58The 2-/4-port voice AT0 analog trunk interface card, processes and transmits overdata communications networks voice signals for 2/4 loops of telephone exchanges.Caution:When connecting the Router 2-Port FXS/2-Port FXO FIC or the Router 4-Port FXS/4-Port FXO FIC,make sure your router has access to an IP network or some other WAN.4.19.2 Interface AttributesThe following table describes the interface attributes of the Router 2-Port FXS/2-PortFXO FIC and the Router 4-Port FXS/4-Port FXO FIC.Table 4-39 Interface attributes of the Router 2-Port FXS/2-Port FXO FIC and the Router 4-PortFXS/4-Port FXO FICAttribute DescriptionConnector RJ-45Number ofconnectors2 (Router 2-Port FXS/2-Port FXO FIC)4 (Router 4-Port FXS/4-Port FXO FIC)Cable Telephone cable with ferrite coreInterface standardITU Q.512-compliant subscriber circuit interfaceITU Q.552-compliant loop trunk interfaceITU K.20-compliant overcurrent protectionDial-up mode Dual-tone multifrequency (DTMF), compliant with GB3378(Pulse dial is not available.)Bandwidth 300 to 3400Hz4.19.3 Panel and Interface LEDsThe following figure illustrates the 2-Port FXS panel:
