Tender for Supply Of Dtmf Technology-based Telephone In Compliance To Rdso Spec. No. (rdso/spn/191/2005) With Dual Media Option (quad / Dark Optical Fiber Cable). The System Is Interchangeably Workable On Quad Cable (upto 30 Db Channel Loss That Translates Upto 15 Km Typically) Or On Optical Fiber (upto 5 Db Channel Loss That Translates Upto 15 Km Typically). [ Warranty Period: 30 Months After The Date Of Delivery ] ] in Dhanbad - Jharkhand

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