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一九八四年四川省优质产品奖评比揭晓,我省邮电工业两项产品——ZZD47型高三路载波电话终端机、JT902型纵横制电力线载波电话交换机榜上有名,省府为他们颁发了优质产品证书。由省邮电器材厂生产的ZZD47型高三路载波机属国内首创,现已畅销全国。该设备特别适合在广大农村的铁线明线上作高频复用,从而使铁线线路充分发挥潜力,其技术指标符合CCITT建议;省邮电交换设备厂生产的JT902型纵横制电力载波机,是一种适用于电力系统枢纽站及中小型变电站之间通信的长市合一的交换机,它的使用打破了原电力线系统通信中载波通道一对一或一对二的连接方式,为电力系统通信的全网自动化打下了基础,填补了我国
1984 Sichuan Province Quality Product Award was announced, the two post and telecommunications industry in our province - ZZD47-type high three-way carrier phone terminals, JT902 vertical and horizontal power line carrier telephone exchange list, the provincial government awarded them high quality Product Certificate. By the provincial post and telecommunications equipment factory production ZZD47 carrier type three high carrier is a domestic initiative, is now selling the country. The device is particularly suitable for rural areas in the high-frequency wire clever reuse, so that the full potential of wire lines, the technical indicators in line with CCITT recommendations; Provincial Posts and Telecommunications Exchange Equipment Factory production of JT902 crossbar power carrier, is A suitable for power system hubs and small and medium-sized substations Changshi exchange between the exchange, its use to break the original power line system communication carrier channel one-on-one or one-to-two connection for the power system communications The whole network automation laid the foundation to fill our country