The Foreign Exchange Office (FXO) module is used in the Total Access 1500 multiservice platform, to provide analog voice extension. The FXO interfaces to the central office switch and to an FXS or RPOTS card over a T1 facility. Four analog voice ports on the FXO access module provide four individual connections to the switch. The FXO supports standard loop start and ground start options. The FXO also supports Dial Pulse Originate (DPO) functionality.