《TBT2996-2000-数字式电话集中机技术要求及试验方法》.pdfVIP

TB 中华人 民共和 国rt}失AM行业W:准 TB/12996- 2000 数字式电话集中机 技术要求及试验方法 2000-03-29发布 2000-11-01实施 中华人民共和国铁道部 发布 标准分享网 免费下载 TB理 目 次 ， ， n 口 0 了 ﹃ 曰 、 ︸ 兮 J j 门 ‘ ， 1 范围 ·····························································································…… 1 引用标准 ·······················································································…… 1 定义 ·。······································。·····。··············································…… 1 产品分类·······················································································……z 一般性能·······················································································……z 技术要求···········，·，，、······、、·、····················、，，，·、·，·，·、··················、··，····、··…3 试验方法 ·······················································································……5 检验规则 ··················。····································································……9 标志、包装、运输和贮存·····································································……9 TB/I2996- 2000 前 言 本标准是根据TB1426-83铁《路站场有线电话设备制式系列》、YD344-90 《自动用户 交换机进网要求》,ITU-TQ517(数字本地交换机音频传输性能规范),ITU-TQ507《数