supply of 1u height tdm multiplexer1u height tdm multiplexer,1u height tdm multiplexer v.21/v.23 to e1, standard 19 inch rack mountable device consisting of one e1 port and two v.21 interface with auto changeover quad ports; unit to support potential free contacts four numbers can be linked with data logger/rtu for e1 status, quad status& power supply sta tus; unit supports dc power supply 18vdc to 72vdc range & ac vide dc to ac adaptor one number provided. the item/ equipment being supplied should be compatible with the existing ufsbi/ bpac installed and working in the bhavnagar division. [ warranty period: 30 months after the date of delivery ] ] => limited