supply of supply of ofc & e1 integrated devicesupply of ofc & e1 integrated device,supply of ofc & e1 integrated device with ofc ports & stm interlinking interface (e1 interface) and interface (v.21/v.23) supporting 2w/4w & six quad protection ports (2w/4w) for individual six e&m interfaces suitable for up to 1u height/19 rack mountable for lvcd / digital axle counter / ufsbi /co ntrol 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 for extending alarms & rs232 ports integrated in the unit & dual power supply support 18vdc to 48 vdc. [ warranty period: 30 months after the date of delivery ] ] => limited