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据英国电信公司称,它的最后一个机电式模拟交换机已为新的数字交换机系统Ⅰ取代,成为世界上第一个实现长途电信网路全数字化的国家,从而拥有世界上最先进的长途网路.
According to BT, its last electromechanical analog switch has been replaced by the new digital switching system I, making it the first country in the world to realize full digitalization of long-distance telecommunication networks and thus have the world’s most advanced long-haul network .