The project deals with attachment requirements and relevant test methods for modems according to CCITT recommendation V.21, which shall comply with the category II approval criteria. The document is only applicable if the approval according to category II is requested. The request for approval is optional.#,,#
DIN ETS 300115-1999由德国标准化学会 DE-DIN 发布于 1999-06。
DIN ETS 300115-1999 在中国标准分类中归属于: M13 通信网结构,在国际标准分类中归属于: 33.040.35 电话网。
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