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民航中南局航管中心电话站于1993年7月引进了加拿大北方电讯公司的Meridian Mail 话音邮递设备。这是一种功能众多的话音处理系统。它通过增强型的串行数据接口与现有的北方电讯公司的数字集中式用户交换机 Option 81一同使用。
Civil Aviation Central and South Bureau Navigational Center telephone station in July 1993 introduced the North Canadian telecommunications company Meridian Mail voice mail equipment. This is a versatile voice processing system. It is used with the existing Nortel Digital Centralized User Switch Option 81 through an enhanced serial data interface.