supply of supply and installation of ofc & e1 integrated device with ofc ports & stm interlinking interfacesupply and installation of ofc & e1 integrated device with ofc ports & stm interlinking interface,supply and installation of ofc & e1 integrated device with ofc ports & stm interlinking inter face (e1 interface) / 12 interface six (v.21/v.23) supporting 2w/4w & six quad protection ports (2w/4w) fo r individual six e&m interfaces suitable for up to 2u height/19 9 rack mountable for lvcd / digital axle co unter / ufsbi /control phone connectivity on optical fiber & e1(stm) with automatic change over features (e1 to quad /ofc-ofc-quad/ofce1 quad), quad health indications for each e&m interface & potential free contacts as required by railways & four ethernet ports & rs232 ports integrated in the unit / audible failure uplink resettable buzzer & dual power supply support 18vdc to 72 vdc. this includes supply of required op tical patch cords for connecting to fdms unit. one dc to ac adaptor to be provided. make: teamlink fabio 2cx or maple 4co or better. all materials required for installation and commissioning to be arranged by co ntractor, (includes power cable and other inter connecting cables.) at 20 stations (copy enclosed) over wa t division. [ warranty period: 30 months after the date of delivery ] ]