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ＪＳＹ２０００－２６（ＤＥＳ－３Ｙ）数字程控用户交换机取得入网许可证１９９５年１１月，由邮电第六实验工厂自行研制开发生产的ＪＳＹ２０００－２６（ＤＥＳ－３Ｙ）数字程控交换机通过了邮电部生产定型鉴定并取得了入网许可证。受邮电部科技司委托，邮电部教育司学...
JSY2000-26 (DES-3Y) digital program-controlled user switch to obtain network license November 1995, the sixth experimental plant by the post-development and production of JSY2000-26 (DES-3Y) digital program-controlled switches passed the Ministry of Posts and Telecommunications production stereotypes identification And made a network license. Commissioned by the Ministry of Posts and Telecommunications Technology, Ministry of Posts and Telecommunications Education Division ...