supply and installation of ofc & e1 integrated device with ofc ports & stm interlinking interface ( e1 interface ) / 12 interface six ( v.21 / v.23 ) supporting 2w / 4w & six quad protection ports ( 2w / 4w ) for individua l six e&m interfaces suitable for up to 2u height / 19 rack mountable for lvcd / digital axle counter / ufsbi / cont rol phone connectivity on optical fiber & e1 ( stm ) with automatic change over features ( e1 to quad / ofc-of c-quad / ofc e1-quad ) , quad health indications for each e&m interface & potential free contacts as required b y railways & four ethernet ports & rs232 ports integrated in the unit / audible failure uplink resettable buzzer & dual power supply support18vdc to 72 vdc. this includes supply of required optical patch cords for connecting to fdms unit. one dc to ac adaptor to be provided. make: teamlink fabio 2cx or similar. [ warranty perio d: 30 months after the date of delivery ]