supply of (1) optical modem model no. teamlink 4 port rstp duplex single fibre 1310 for scada connectivity with metal box and ear mounting kit. (2) optical modem model no. teamlink 4 port rstp duplex single fibre 1550 for scada connectivity with metal box and ear mounting kit.(1) optical modem model no. teamlink 4 port rstp duplex single fibre 1310 for scada connectivity with metal box and ear mounting kit. (2) optical modem model no. teamlink 4 port rstp duplex single fibre 1550 for scada connectivity with metal box and ear mounting kit.,optical modem model no. teamlink 4 port rstp duplex single fibre 1550 for scada connectiv ity with metal box and ear mounting kit. [ warranty period: 30 months after the date of delivery ] ] , optical modem model no. teamlink 4 port rstp duplex single fibre 1310 for scada connectiv ity with metal box and ear mounting kit. [ warranty period: 30 months after the date of delivery ] ]