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爱立信公司AXE—10公网交换机的最新应用系统版本CN49于1996年11月6日在南京470局结束了测试.CN49版爱立信公司最新的产品线P.L.12.3在中国市场上的第一个应用系统,它的最显著功能是引入了窄带ISDN(N—ISDN)功能.南京470局是中国市场上第一个采用CN49版的AXE—10交换机,因此,电总软件中心指定在此对CN49进行功能测试.1996年9月2日到10月29日,由江苏省邮电管理局电话交换技术维护支援中心、南京电信局和爱立信公司专家组成的联合测试组对CN49版进行了全面测试.在此基础上,电总软件中心又会同省、市局测试人员对CN49的N—ISDN业务以及增强的PSTN业务进行了复测.由于邮电部关于ISDN的技术规范未正式公布,因此,测试基本上是按照厂家提供的测试方法进行的;而且测试通过后也未对CN49版本作正式的验收签字.这次测试的N—ISDN业务包括承载业务、用户综合(电信)业务、补充业务.承载业务包括电路模式的话音、3.1kHZ音频和64kb/s不受限数字信号的承载业务,以及用户到用户的半永久连接;用户综合(电信)业务包括电话呼叫、数据呼叫和多媒体视听会议等;ISDN补充业务中除了现在已开放的各种业务以外,还测试了主叫线识别(CLIP)和限制(CLIR)、连接线
The latest application system version CN49 of Ericsson’s AX-10 public network switch ended its test at 470 in Nanjing on November 6, 1996. The first application system for PL12.3 in the Chinese market is the latest version of the 49-line Ericsson Ericsson, Its most notable feature is the introduction of Narrowband ISDN (N-ISDN) functionality.The Nanjing 470th is the first AXE-10 switch in the Chinese market to use the CN49 version, so the General Electric Software Center specifies the CN49 for functional testing here From September 2, 1996 to October 29, 1996, the CN49 version was thoroughly tested by a joint test group consisting of the Telephone Exchange Technical Maintenance Support Center of Jiangsu Province Post and Telecommunications Administration, Nanjing Telecommunication Bureau and Ericsson Company. On this basis , The total software center with the provincial and municipal bureau testers on the CN49 N-ISDN business and enhanced PSTN business retest.Because the Ministry of Posts and Telecommunications on the ISDN technical specifications are not officially announced, so the test is basically in accordance with the manufacturers Provided by the test method; and after passing the test has not made a formal acceptance of CN49 version signature. The test of N-ISDN services include bearer services, user integrated (telecommunications) business, make up Services, bearer services including circuit mode voice, 3.1kHZ audio and 64kb / s unlimited digital signal bearer services, as well as user to user semi-permanent connections; user integrated services including telephone calls, data calls and multimedia audio-visual conference Etc .; ISDN supplementary business in addition to the now open a variety of businesses, also tested the calling line identification (CLIP) and restrictions (CLIR), cable