Check your eligibility criteria for tender Supply of Ip Telephone Opem Source Suitable For Existing System Installed At Rjt, Churchgate, Western Railway Ip Server Wit H Minimum Three Years Oem Warranty. Make: - Phone Of Grandstream Or Yealink Or Avaya Or Any Make With Similar Config Uration Have Technical Specification Is Attached At Annexure A. Warranty Period: 36 Months After The Date Of Delivery