(1) Cellular communication may be used for data acquisition system, where feasibility of access to wideband network is not possible.
(2) Cellular communication shall be adopted after ensuring the available signal level up to the required strength and dual or more Subscriber Identification Module (SIM) with different service provider with automatic changeover to ensure 99.5 per cent. link availability for interruption free operation of the communication system.
(3) Design shall be for satisfactory and continuous operation in open environment with operating temperature range of -10 deg. C to 55 deg. C and humidity up to 95 per cent. noncondensing.
(4) Field interface shall be optical port / RS232 / RS485 / RJ45 IP or any other suitable port.
(5) Receiving device shall support International Electro-Technical Commission (IEC) - 60870 -5- 101 and International Electro-Technical Commission (IEC) 60870 -5- 104 protocol and Device Language Message Specification (DLMS) (IS15959/IEC 62056), Modbus for interfacing.
(6) Receiving end shall have Multi Wide Area Network Virtual Private Network (WAN VPN) concentrator with built-in facility to manage at least 250 remote nodes for a fixed IP provided for control center.
(7) Receiving end shall have redundant Multi Wide Area Network Virtual Private Network (WAN VPN) Concentrator with a fail over fall back feature for uninterrupted data communication.
(8) Router shall be capable of handling Virtual Private Network (VPN) based security by assuming a fixed IP issued by the Multi Wide Area Network Virtual Private Network (WAN VPN) concentrator at the supervisory control and data acquisition (SCADA) end.
(9) Device shall have the capability of data encryption with Triple Data Encryption Standard (3-DES) or Advanced Encryption Standard (AES) 128 or latest to ensure secured communication network over broadband, 2G or 2.5G or 3G or 4G or 5G or latest.
26 THE GAZETTE OF INDIA : EXTRAORDINARY [PART III SEC. 4]
(10) Device shall have capability to decide and act according to the best available link in redundant mode configuration with automatic switch over.
(11) Quality of service (QoS) and bandwidth management shall be planned to get optimal bandwidth usage.
(12) Centralised monitoring at control centre shall be available.
(13) Receiving device shall have Internet Protocol Security (IPsec), Point-to-Point Tunneling Protocol (PPTP), and Layer 2 Tunneling Protocol Virtual Private Network (L2TP VPN) support up to eight concurrent tunnels with max 70 Mbps throughput.
(14) Communication equipment or modem shall comply with Ingress Protection (IP) rating suitable for the installation condition as agreed between the user and provider.
(15) The relevant standards and code of practice of cellular communication as specified in the Bureau of Indian Standards (BIS), the International Electro-Technical Commission (IEC), the European Standards (EN), the European Telecommunications Standards Institute (ETSI) and the International Special Committee on Radio Interference (CISPER) shall be followed.
CHAPTER VII VERY SMALL APERTURE TERMINAL COMMUNICATION