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电信,即可以传递信息的电信号。这里指所有以电信号传递、传播信息的通信方式,如电报、电传、电话、无线寻呼机、卫星通信网和多媒体信息系统等。 电报主要是通过专用信息密码传递信息;电传则可通过有线或无线电信号,将信息内容如文字、图片、照片等直接传递给信息接收者。 电话,可以通过有线或无线光、电信号转换装置,使信息发布和接
Telecom, an electrical signal that can convey information. This refers to all means of communication, such as telegraph, telex, telephone, radio pagers, satellite communication networks and multimedia information systems, that use electrical signals to transmit and distribute information. Telegraphs mainly use special information and password to transmit information; while telex can transmit information contents such as words, pictures and photos directly to information recipients through wired or wireless signals. Telephone, through the wired or wireless light, electrical signal conversion device, the information released and then