However , the development of SCADA ( supervisory control and data acquisition ) systems allowed remote control and monitoring of electrical plant from centralised control centres .
Prior to the development of electronics and telecommunications networks all co-ordination between control centres was carried out by telephone .
The development of SCADA ( supervisory control and data acquisition ) systems allowed remote control and monitoring of electrical plant from centralised control centres .
Prior to the development of electronics and telecommunications networks all co-ordination between control centres was carried out by telephone .