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据《Journal of Electronic Defense》1992年7刊报道:由美国马萨诸塞州技术通信公司推出的CSD 3324E型电话机是为保密的办公室中心设计的,这种电话机能通过标准的电话线为计算机、话音和传真通信提供长期的战略安全。该装置能自动确定呼入的是传真还是话
According to “Journal of Electronic Defense”, 1992, 7th issue: The CSD 3324E telephone set by the Massachusetts Technology and Communication Company was designed for a confidential office center that can be used for computers, voice over standard telephone lines And fax communications provide long-term strategic security. The device automatically determines whether incoming fax or incoming calls