Re: GEC Reliance Phone
The E-Link phone was developed in-house by RTC engineers. It utilised DC leg signalling and was connected using three wires. By sending positive or negative signals down the wires, all ten digits from 0 to 9 could be selected. It was used on strowger and cross-bar PAX systems (made in Hungary) and was their first PB telephone, modelled on an existing GEC/Telecom phone range.
The three wires mean it needed additional cabling. It was only used on internal (PAX) systems.
Thinking about this again, the E-Link was at least a step forward from the push-button phones on the market and available from Telecom. It did have some sort of electronic signalling. The push-button telephones available on the market were decadic, pressing a button sent a series of pulses in exactly the same way dial phones worked. Using them for long distance calls mean you had a long wait after keying in the numbers while the phone went through the the numbers and sent their pulses.
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