DS/I-ETS 300245-4-1995
综合业务数字网（ISDN），电话终端的技术特性．第4部分：附加设备接口（AEI）
Integrated Services Digital Network (ISDN); Technical characteristics of telephony terminals; Part 4: Additional Equipment Interface (AEI)
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- 标准号
- DS/I-ETS 300245-4-1995
- 发布日期
- 1995年05月24日
- 实施日期
- 1995年05月24日
- 废止日期
- 无
- 国际标准分类号
- 33.080
- 发布单位
- DK-DS
- 适用范围
- This I-ETS specifies the technical characteristics (physical, electrical, logical and functional) of a family of interfaces for the connection Additional Equipment to ISDN telephony terminals. These interfaces support the facilities and services applicable mainly to ISDN telephony teleservices appropriated to those functions. Two interfaces allow bidirectional transparent analogue transmission of B-channel information between the telephony terminal and the Additional Equipment with a band width of 3,1 kHz or 7 kHz. Both a ""2 wire"" and a ""4-wire"" interface.