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目前,在自动拨号系统和多信道共用系统中,移动电台和固定电台有的还处于手动慢速发码状态,入网信令码占用时间长,容易引起碰撞,不仅增加了系统呼损,也易被其他具有全频段手机的网外用户盗用上线码。为此根据各种系统的技术要求,我们研制了适用于各种无线电台的分站控制器。该控制器采用单片机,应用专用DTMF编解码技术,通过程序控制完成DTMF信令的快速自动编/解码、完成无线用户自动入网,并完成无线电台频率合成器的分频比控制,响应基站的指令,进行无线电台信道的自动转换。
Currently, in the automatic dialing system and the multi-channel sharing system, some of the mobile stations and the fixed stations are still in the state of slow sending manually. The access signaling takes a long time and easily causes collision, which not only increases the call loss of the system but also is easy Be stolen by other Internet users with full-band handsets. To this end, according to the technical requirements of various systems, we have developed sub-station controllers for various radio stations. The controller uses a single-chip microcomputer, application-specific DTMF codec technology, through the program control DTMF signaling to complete fast automatic encoding / decoding to complete wireless users automatically network, and to complete the radio frequency synthesizer frequency division ratio control in response to base station instructions , The radio channel automatically converted.