ETSI ETS 300 450-商业电信（BTC）；普通和特殊质量语音带宽双线模拟租用线路（A2O和A2S）；终端设备接口-国家数字标准馆

现行 ETSI ETS 300 450

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Business TeleCommunications (BTC); Ordinary and Special quality voice bandwidth 2-wire analogue leased lines (A2O and A2S); Terminal equipment interface 商业电信（BTC）；普通和特殊质量语音带宽双线模拟租用线路（A2O和A2S）；终端设备接口

发布日期： 1996-02-01

接口终端设备侧的规范和合规性测试程序。

Specification of the terminal equipment side of the interface and test procedures for compliance.

分类信息

发布单位或类别：国际组织-欧洲电信标准协会

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研制信息

相似标准/计划/法规

UNE-ETS 300450-1997

BUSINESS TELECOMMUNICATIONS (BTC). ORDINARY AND SPECIAL QUALITY VOICE BANDWIDTH 2-WIRE ANALOGUE LEASED LINES (A2O AND A2S). TERMINAL EQUIPMENT INTERFACE.
商业电信（BTC）普通和特殊质量语音带宽双线模拟租用线路（A2O和A2S）终端设备接口

ETSI ETS 300 453

Business TeleCommunications (BTC); Ordinary and Special quality voice bandwidth 4-wire analogue leased lines (A4O and A4S); Terminal equipment interface
商业电信（BTC）；普通和特殊质量的语音带宽四线模拟租用线路（A4O和A4S）；终端设备接口

Business TeleCommunications (BTC); Ordinary and Special quality voice bandwidth 4-wire analogue leased lines (A4O and A4S); Attachment requirements for terminal equipment interface
商业电信（BTC）；普通和特殊质量的语音带宽四线模拟租用线路（A4O和A4S）；终端设备接口附件要求

UNE-TBR 17-1997

BUSINESS TELECOMMUNICATIONS (BTC). ORDINARY AND SPECIAL QUALITY VOICE bandwidth 4-wire analogue leased lines (A4O and A4S). Attachment requirements for terminal equipment interface.
商业电信（BTC）普通和特殊质量的语音带宽四线模拟租用线路（A4O和A4S）终端设备接口的附件要求

Business TeleCommunications (BTC); Ordinary and Special quality voice bandwidth 2-wire analogue leased lines (A2O and A2S); Attachment requirements for terminal equipment interface
商业电信（BTC）；普通和特殊质量语音带宽双线模拟租用线路（A2O和A2S）；终端设备接口附件要求

UNE-TBR 15-1997

BUSINESS TELECOMMUNICATIONS (BTC). ORDINARY AND SPECIAL QUALITY VOICE BANDWIDTH 2-WIRE ANALOGUE LEASED LINES (A2O AND A2S). ATTACHMENT REQUIrements for terminal equipment interface.
商业电信（BTC）普通和特殊质量语音带宽双线模拟租用线路（A2O和A2S）终端设备接口的附件要求

UNE-ETS 300453-1997

BUSINESS TELECOMMUNCATIONS (BTC). ORDINARY AND SPECIAL QUALITY VOICE BANDWIDTH 4-WIRE ANALOGUE LEASED LINES (A4O AND A4S). TERMINAL EQUIPMENT INTERFACE.
商业电信（BTC）普通和特殊质量的语音带宽四线模拟租用线路（A4O和A4S）终端设备接口

UNE-ETS 300451-1997

BUSINESS TELECOMMUNICATIONS (BTC). ORDINARY QUALITY VOICE BANDWIDTH 4-wire analogue leased line (A40). Connection characteristics and network interface presentation.
商业电信（BTC）普通质量语音带宽4线模拟租用线路（A40）连接特征和网络接口演示

ETSI ETS 300 448

Business TeleCommunications (BTC); Ordinary quality voice bandwidth 2-wire analogue leased line (A2O); Connection characteristics and network interface presentation
商业电信（BTC）；普通质量语音带宽双线模拟租用线（A2O）；连接特性和网络接口演示

ETSI ETS 300 451

Business TeleCommunications (BTC); Ordinary quality voice bandwidth 4-wire analogue leased line (A4O); Connection characteristics and network interface presentation
商业电信（BTC）；普通质量语音带宽四线模拟租用线（A4O）；连接特性和网络接口演示

UNE-ETS 300448-1997

BUSINESS TELECOMMUNICATIONS (BTC). ORDINARY QUALITY VOICE BANDWIDTH 2-wire analogue leased line (A20). Connection characteristics and network interface presentation.
商业电信（BTC）普通质量语音带宽双线模拟租用线路（A20）连接特征和网络接口演示

ETSI ETS 300 452

Business TeleCommunications (BTC); Special quality voice bandwidth 4-wire analogue leased line (A4S); Connection characteristics and network interface presentation
商业电信（BTC）；特殊质量语音带宽四线模拟租用线路（A4S）；连接特性和网络接口演示

ETSI ETS 300 449

Business TeleCommunications (BTC); Special quality voice bandwidth 2-wire analogue leased line (A2S); Connection characteristics and network interface presentation
商业电信（BTC）；特殊质量语音带宽双线模拟租用线路（A2S）；连接特性和网络接口演示

UNE-ETS 300452-1997

BUSINESS TELECOMMUNICATIONS (BTC). SPECIAL QUALITY VOICE BANDWITH 4-WIre analogue leased line (A4S). Connection characteristics and network interface presentation.
商业电信（BTC）带有4线模拟租用线路（A4S）的特殊质量语音带连接特征和网络接口演示

UNE-ETS 300449-1997

BUSINESS TELECOMMUNICATIONS (BTC). SPECIAL QUALITY VOICE BANDWIDTH 2-Wire analogue leased line (A2S). Connection characteristics and network interface presentation.
商业电信（BTC）特殊质量语音带宽双线模拟租用线路（A2S）连接特征和网络接口演示

《国家标准化发展纲要》提出建设国家数字标准馆，推动标准化工作向数字化、网络化、智能化转型。中国标准化研究院正在全力推进国家数字标准馆建设，力争在2026年底建成“一个中心”和“一个平台”，即全球领先的标准数据资源中心，涵盖标准全生命周期的数字化、网络化、智能化研究与服务平台。

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