By William F Rush; James E Huebler; Jared R W Smith; Institute of Gas Technology
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Extra resources for Integrating microelectronics into gas distribution
Upon receiving a request and a proper log-in sequence from the utility’s remote terminal, the modem breaks the connection and dials a pre-programmed telephone number for a specified user’s terminal. Once the SLAC is reconnected to the utility’s terminal, the Communications Control Unit (CCU) communicates with the SLAC and proceeds with dialing up the individual customer telephone lines. The telephone company controls the SLAC programming of telephone numbers and log-on passwords. The SLAC provides for connection to the central office alarm system.
It uses a two wire (tip and ring) connection to the telephone network by attachment to the telephone protector block. It is not polarity sensitive, is powered by the telephone line (48 volts), and operates in the standard voice frequency range. FUNCTIONAL OVERVIEW CMR is a computerized data collection system developed by NEPTUNE INFORMATION SYSTEMS and is designed for efficient cost-effective central meter reading using two-way cable TV networks. The heart of the system is a Communications Control Unit (CCU) which collects and stores meter reading data from remote terminals (utility customers) throughout the network.
Alarm capabilities which will notify the gas company immediately for such non-standard conditions as: energy diversion, intrusion, tampering, regulator failure, compressor failure, leak detection, and low pressure, to name a few, also help justify this new technology. The following paper introduces a system which allows a utility to incorporate the above benefits and maintain control of its destiny. The system is solely owned and controlled by the distribution company without third party interface.