the signaling type of FXS interface. fxsLoopStart - loop start. fxsGroundStart - ground start. fxsLoopStartFd fxsGroundStartAutomatic - Used with equipment requiring fast response time to the Central Office. fxsGroundStartImmediate - Used with equipment requiring fast response time to the station or PBX. fxsdnLoopStart- loop start in fxsdn mode fxsdnLoopStartFd fxsdnGroundStart- Ground start in fxsdn mode fxsdnGroundStartImmediate - Ground start immediate in fxsdn mode fxsdnwinkLoopStart - loop start in fxsdnwink (foreign exchange subscriber - defined wink start operation) this option proved the same type of signalling as FXSDN and provides 150 millisecond delay then 200 ms wink ack to the central office when fxs port sees an off hook condition from central office . The system requires a ringing generator for this option. fxsdnwinkLoopStartFd fxsdnwinkGroundStart- Ground start in FXSDNWINK mode fxsdnwinkGroundStartImmediate - Ground start immediate in FXSDNWINK mode. fxstr08SingleParty - TR08 is Frame format signalling and data link as defined in TR-TSY-00008 Mode 1 for circuits using AT & T SLC-96 facilities. this option is for single party service , this option connects the port to one way out going trunks from a PBX , CENTEREX, key system , ot telephone set to an SLC channel. The SLC96 mode also must be active on the associated WAN interface. fxstr08UniversalVoiceGrade - Toll quality voice for SLC-96 fxstr08UniversalVoiceGradeAutomatic- Used with some non - Bell switches for SLC-96 The default value of this object is fxsLoopStart(1).