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第1297章 小灵通的技术(1 / 2)

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与此同时,李舜也接到了徐新的电话。PHS嫁接固定电话网的技术已经全部吃透,下一步就可以进入到商用阶段。听到这个消息后,李舜没有耽搁,立即带着娜塔莎赶往了余航。

到了余航,李舜也顾不上一路的舟车劳顿,直接就去了余航电信公司。可能是两人,好久没有碰过面了。李舜走进徐新办公室后,徐新居然没有认出来到人是谁。

一番介绍后,徐新这才恍然大悟,伸出手热情的和李舜握了起来:“不好意思,李老板见谅。我的眼神不好,一下子没认出你来。”

李舜自然没必要,为了这点小事和他置气。于是,也就提出了想看看实验的效果。徐新也没有迟疑,直接领着李舜就进了实验室。

一进实验室,徐新就开始热情的给李舜介绍起来:“PHS采用微蜂窝技术,将电话以数字无线的方式,接入固定电话网,作为固定电话延伸的业务。

由中心控制模块(CCM)、移动管理中心(MMC)、操作维护中心 (OMC)、接入网络单元(ANU)、基站控制器(CSC)、基站(CS)和手机(PS)组成。

PHS采用多载波TDMA/TDD技术,工作频带900-1915MHz,载波间隔300KHz,语音编码采用32kb/sADPCM方式。PHS主要提供2类时隙,即控制时隙(C)和通话时隙(T)。

控制时隙主要用于建立通信链路,而通信时隙分别分配给每一个CS和PS对,其识别码大于108种组合。在PHS系统中,时隙在使用上采用了1C+3T方式。

1C表示一对控制时隙,3T表示3对通话时隙。为了提高控制时隙的可靠性和有效性,控制时隙使用独立载波,并留有保护载波带宽。通话时隙则根据通话时隙则根据系统设定,自动选择干扰最小的时隙来使用。”

果然,前世徐新功成名就后,选择去大学当讲授是有原因的。他的理论造诣还是很高的,也喜欢好为人师。可他,偏偏碰到了李舜这个朽木。此刻的李舜,已经被那些数字搞得昏头转向。

见李舜这个神情,徐新也只能摇摇头。从文件柜里拿出一个,形状有点像大号遥控器的玩意。见到这个玩意,李舜居然一时都没反应过来。

毕竟前世,自己好歹也见识过各种的小灵通。哪怕是第一代的,外形也没有这么巨大。大也就算了,关键形状还是巨丑的。

见李舜露出嫌弃的眼神,徐新哈哈的笑了起来:“李老板,这个只是工程测试用机。仅仅是为了测试使用效果,外形方面也就没有考虑。别的不说,你先试试效果再说。”

说着,徐新也就打开了这台工程测试机。李舜接过后,也就直接拨打了自己的手机。现在的工程机接通速度和手机相比,还是略微显得慢了一点。

但幸好,还是在可以忍受的范围内。李舜也就把手机递给了徐新,自己跑到另一个房间开始测试通话效果。等接通电话后,李舜也就开始仔细聆听起来。

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