This ETS aims to meet the requirements of network operators and equipment manufacturers who are designing equipment to operate with an increased speed on Videotex services over the Public Switched Telephone Network (PSTN).. This ETS har a close relationship to the set of ETSs 300 072 (1) to 300 075 (4) describing the Videotext data syntax. This ETs specifies how to use the end-to-end protocols defined by draft prETS 300 223 (6) in the case of syntax-based.
DS/ETS 300221-1994由丹麦标准化协会 DK-DS 发布于 1994-04-18,并于 1994-04-18 实施。
DS/ETS 300221-1994在国际标准分类中归属于: 33.050.30 用户电报、可视图文、用户传真设备。
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