
技术领域technical field
本发明涉及一种电话通讯技术,特别涉及一种多端口多频道双向连通式电话通讯装置,其可适用于搭接至一具有语音输出入功能的信息平台,例如为个人计算机、公共信息站、移动电话(俗称手机)、网络可视电话、个人数字助理装置(Personal Digital Assistant,PDA)、等等;且其至少具有一因特网连接端口和一电话网络连接端口,例如为一RJ45连接端口和一RJ11连接端口,可用以让该信息平台选择性地通过其来连接至因特网(Internet)或公用电话交换网(Public SwitchedTelephone Network,PSTN),以此让使用者可选择性地使用网络电话通讯功能(Voice over Internet Protocol,VoIP)或传统的拨接电话通讯功能(dial-up telephony)。The present invention relates to a telephone communication technology, in particular to a multi-port multi-channel two-way communication telephone communication device, which can be adapted to be connected to an information platform with voice input and output functions, such as personal computers, public information stations, Mobile phones (commonly known as mobile phones), Internet video phones, personal digital assistants (Personal Digital Assistant, PDA), etc.; and it has at least one Internet connection port and a telephone network connection port, such as an RJ45 connection port and a The RJ11 connection port can be used to allow the information platform to selectively connect to the Internet (Internet) or the public switched telephone network (Public Switched Telephone Network, PSTN) through it, so that users can selectively use the network telephone communication function ( Voice over Internet Protocol, VoIP) or traditional dial-up telephony.
背景技术Background technique
传统的电话通讯是通过公用电话交换网(Public Switched TelephoneNetwork,PSTN)来将发话端的电话机联机至受话端的电话机,并由模拟通讯设备来传递电话信号。但随着数字技术的发展,目前的公用交换电话网络系统已大部分采用数字通讯设备来传递电话信号。The traditional telephone communication is to connect the telephone at the calling end to the telephone at the receiving end through the Public Switched Telephone Network (PSTN), and transmit the telephone signal through the analog communication equipment. However, with the development of digital technology, most of the current public switched telephone network systems use digital communication equipment to transmit telephone signals.
此外,随着计算机网络技术的发展,目前亦已发展出一种网络电话通讯技术(Voice over Internet Protocol,VoIP),其可让发话端和受话端由计算机平台及通过因特网(Internet)来传递电话信号;亦即使用者的计算机平台只要具备有数字语音输出入功能及因特网联机功能,即可通过因特网来使用此种网络电话通讯功能。In addition, with the development of computer network technology, a VoIP communication technology (Voice over Internet Protocol, VoIP) has also been developed, which allows the calling end and the receiving end to be transmitted by the computer platform and through the Internet (Internet). Telephone signal; that is, as long as the user's computer platform has a digital voice input and output function and an Internet connection function, the Internet telephone communication function can be used through the Internet.
目前常用的因特网联机方式例如包括有非对称数字用户线路(Asymmetric Digital Subscriber Line,ADSL)、缆线调制解调器(CableModem)、电话拨接、等等;其中ADSL联机方式是采用一条相同的电话线路来传递高频的网络电话信号及低频的拨接电话信号。但由于网络电话信号与拨接电话信号共享同一条电话线路,因此其须加装一网关器(gateway)来分离及切换此二种信号,并将分离出来的网络电话信号及拨接电话信号分别传送至计算机平台及电话机。Currently commonly used Internet connection methods include, for example, asymmetric digital subscriber line (Asymmetric Digital Subscriber Line, ADSL), cable modem (CableModem), telephone dial-up, etc.; wherein the ADSL connection method uses the same telephone line to transmit High-frequency VoIP signal and low-frequency dial-in phone signal. However, since the Internet telephone signal and the dial-up telephone signal share the same telephone line, it is necessary to install a gateway to separate and switch the two signals, and separate the separated Internet telephone signal and dial-up telephone signal. Send to computer platform and telephone.
然而现有技术的一项缺点在于其仅能提供单向的切换功能,而无法提供双向的切换功能。这是由于目前的切换功能并无法达成[固定网络地址对动态网络地址]和[动态网络地址对动态网络地址]的网络电话通讯功能。However, a disadvantage of the prior art is that it can only provide a one-way switching function, but cannot provide a two-way switching function. This is because the current switching function cannot achieve the Internet telephony communication functions of [fixed network address to dynamic network address] and [dynamic network address to dynamic network address].
发明内容Contents of the invention
鉴于以上所述现有技术的缺点,本发明的主要目的在于提供一种多端口多频道双向连通式电话通讯装置,其可提供双向切换的网络电话通讯功能及拨接电话通讯功能。In view of the above-mentioned shortcomings of the prior art, the main purpose of the present invention is to provide a multi-port multi-channel two-way connection type telephone communication device, which can provide two-way switchable Internet phone communication function and dial-in phone communication function.
本发明的另一目的在于提供一种多端口多频道双向连通式电话通讯装置,其可提供[固定网络地址对动态网络地址]和[动态网络地址对动态网络地址]的网络电话通讯功能。Another object of the present invention is to provide a multi-port multi-channel two-way communication telephone communication device, which can provide [fixed network address to dynamic network address] and [dynamic network address to dynamic network address] network telephone communication function.
一种多端口多频道双向连通式电话通讯装置,其可适用于搭接至一具有语音输出入功能的信息平台,用以将让该信息平台选择性连接至因特网或公用电话交换网,以此让使用者可选择性地使用网络电话通讯功能或拨接电话通讯功能;此多端口多频道双向连通式电话通讯装置至少包含:(a)一因特网连接端口,其用以连接至因特网;(b)一电话网络连接端口,其用以连接至公用电话交换网;(c)一信息平台接口模块,其用以连接至该信息平台;(d)一按键模块,其至少具有一网络电话选择键和一拨接电话选择键;(e)一切换模块,其至少具有一第一输出入端、一第二输出入端、和一第三输出入端;其中该第一输出入端连接至该因特网连接端口,该第二输出入端连接至该电话网络连接端口,而该第三输出入端则连接至该信息平台接口模块;该切换模块受控于该按键模块的网络电话选择键而将该第三输出入端切换至该第一输出入端;并受控于该按键模块的网络电话选择键而将该第三输出入端切换至该第一输出入端;(f)一显示模块,其可显示此多端口多频道双向连通式电话通讯装置目前的操作模式系为网络电话通讯模式或拨接电话通讯模式;(g)一因特网网关功能模块,其可经由该切换模块的切换动作而连接至该信息平台接口模块,用以对该信息平台所发出的网络电话信号提供一因特网网关功能;(h)一因特网路由功能模块,其藕接至该因特网网关功能模块,用以对该因特网网关功能模块所输出的信号提供一因特网路由功能;且该因特网路由功能模块具有一设定模块,可用以预设发信的电话号码和网络地址;以及(i)一来电种类判别模块,其同时连接至该因特网连接端口的输入电路和该电话网络连接端口的输入电路,用以判别一来电信号是为一网络电话信号或为一拨接电话信号;若为网络电话信号,则令该显示模块显示出一网络电话来电通知信号;反之,若为拨接电话信号,则令该显示模块显示出一拨接电话来电通知信号。A multi-port, multi-channel, two-way communication telephone communication device, which can be adapted to be connected to an information platform with voice input and output functions, so as to allow the information platform to be selectively connected to the Internet or a public switched telephone network. Allow users to selectively use the Internet phone communication function or dial-in phone communication function; this multi-port multi-channel two-way communication telephone communication device at least includes: (a) an Internet connection port, which is used to connect to the Internet; (b ) a telephone network connection port, which is used to connect to the public switched telephone network; (c) an information platform interface module, which is used to connect to the information platform; (d) a key module, which has at least one network phone selection key and a telephone selection key; (e) a switching module, which has at least a first input-output terminal, a second input-output terminal, and a third input-output terminal; wherein the first input-output terminal is connected to the The Internet connection port, the second I/O end is connected to the telephone network connection port, and the third I/O end is connected to the information platform interface module; the switch module is controlled by the Internet phone selection key of the button module to The third input-output terminal is switched to the first input-output terminal; and the third input-output terminal is switched to the first input-output terminal under the control of the network phone selection key of the button module; (f) a display module , which can display that the current operation mode of the multi-port multi-channel two-way communication telephone communication device is the Internet telephone communication mode or the dial-up telephone communication mode; (g) an Internet gateway function module, which can be switched through the switching module And be connected to this information platform interface module, in order to provide an Internet gateway function for the VoIP signal that this information platform sends; (h) an Internet routing function module, it is coupled to this Internet gateway function module, in order to The signal output by the Internet gateway function module provides an Internet routing function; and the Internet routing function module has a setting module, which can be used to preset the phone number and network address for sending a letter; and (i) an incoming call type discrimination module, which Simultaneously connected to the input circuit of the Internet connection port and the input circuit of the telephone network connection port, it is used to distinguish whether an incoming call signal is a network telephone signal or a dial-and-receive signal; if it is a network telephone signal, the display The module displays a notification signal of an incoming network phone call; on the contrary, if it is a call signal, the display module displays a notification signal of an incoming call.
本发明的多端口多频道双向连通式电话通讯装置的特点在于可用以让该信息平台选择性地通过其来连接至因特网或公用电话交换网,以此让使用者可选择性地使用网络电话通讯功能或传统的拨接电话通讯功能。The feature of the multi-port multi-channel two-way communication telephone communication device of the present invention is that it can be used to allow the information platform to selectively connect to the Internet or the public switched telephone network through it, so that users can selectively use Internet telephony communication function or traditional dial-up telephone communication function.
本发明的多端口多频道双向连通式电话通讯装置的优点在于可提供多频道的双向连通式的网络电话通讯功能和拨接电话通讯功能,并可提供[固定网络地址对动态网络地址]和[动态网络地址对动态网络地址]的网络电话通讯功能,因此较现有技术具有更佳的创造性及实用性。The advantage of the multi-port multi-channel two-way connected telephone communication device of the present invention is that it can provide multi-channel two-way connected network telephone communication function and dial-in telephone communication function, and can provide [fixed network address to dynamic network address] and [ Dynamic network address to dynamic network address] network telephony communication function, therefore have better creativity and practicality than prior art.
附图说明Description of drawings
本发明的实质技术内容及其实施例已用图解方式详细绘制于本说明书的附图之中。此些附图的内容简述如下:The essential technical content of the present invention and its embodiments have been drawn in detail in the accompanying drawings of this specification in a diagrammatic manner. The contents of these drawings are briefly described as follows:
图1为一应用结构示意图,其中显示本发明的多端口多频道双向连通式电话通讯装置的应用结构;Fig. 1 is a schematic diagram of an application structure, which shows the application structure of the multi-port multi-channel two-way communication device of the present invention;
图2为一系统结构示意图,其中显示本发明的多端口多频道双向连通式电话通讯装置的内部系统结构。FIG. 2 is a schematic diagram of a system structure, which shows the internal system structure of the multi-port, multi-channel, two-way communication device of the present invention.
图中符号说明:Explanation of symbols in the figure:
10 具有语音输出入功能的信息平台10 Information platform with voice input and output functions
20 因特网20 Internet
20A 因特网连接接口(ATU-R)20A Internet connection interface (ATU-R)
20B 因特网调制解调器房(ATU-C)20B Internet Modem Room (ATU-C)
21 个人计算机21 personal computer
22 个人数字助理装置22 Personal digital assistant device
23 移动电话23 mobile phone
24 网络电话机24 Internet phone
25 网络可视电话25 Internet Videophone
26 公共信息站26 Public information station
30 公用电话交换网30 Public switched telephone network
31 拨接式电话机31 dial-up telephone
32 移动电话32 mobile phone
100 本发明的多端口多频道双向连通式电话通讯装置100 The multi-port multi-channel two-way communication telephone communication device of the present invention
101 因特网连接端口(RJ45)101 Internet connection port (RJ45)
102 电话网络连接端口(RJ11)102 Telephone network connection port (RJ11)
103 信息平台接口模块103 Information platform interface module
110 按键模块110 key module
111 网络电话选择键111 Internet phone selection key
112 拨接电话选择键112 Dialing and answering selection key
120 切换模块120 switching modules
120a 第一输出入端120a first input and output terminal
120b 第二输出入端120b second input and output terminal
120c 第三输出入端120c The third input and output terminal
130 显示模块130 display module
131 网络电话显示器131 VoIP display
132 拨接电话显示器132 Dial and receive phone display
140 因特网网关功能模块140 Internet gateway function module
150 因特网路由功能模块150 Internet routing function module
151 网络地址及电话号码设定模块151 Network address and telephone number setting module
160 来电种类判别模块160 Incoming call type discrimination module
具体实施方式Detailed ways
以下即配合附图,详细说明本发明的多端口多频道双向连通式电话通讯装置发明的实施例。The embodiment of the invention of the multi-port multi-channel two-way communication device of the present invention will be described in detail below with reference to the accompanying drawings.
图1的应用结构示意图即显示本发明的多端口多频道双向连通式电话通讯装置100的应用结构。如图所示,本发明的多端口多频道双向连通式电话通讯装置100在实际应用时,搭接至一具有语音输出入功能的信息平台10,例如为个人计算机、公共信息站、移动电话(俗称手机)、网络可视电话、个人数字助理装置(Personal Digital Assistant,PDA)、等等,且其至少具有一因特网连接端口和一电话网络连接端口,例如为一RJ45连接端口101和一RJ11连接端口102,用以让该信息平台可由该RJ45连接端口101而外接至一因特网连接接口20A(例如为宽频上网的ATU-R装置)及一因特网调制解调器房20B(例如为宽频上网的ATU-C设备),以借其而连接至因特网(Internet)20;并同时由该RJ11连接端口102而连接至公用电话交换网(Public Switched TelephoneNetwork,PSTN)30;以此让使用者可选择性地使用网络电话通讯功能(Voice over Internet Protocol,VoIP)或传统的拨接电话通讯功能(dial-uptelephony)。The application structure schematic diagram of FIG. 1 shows the application structure of the multi-port, multi-channel two-
若使用者选择使用网络电话通讯功能,则其即可由信息平台10的语音输出入功能及通过本发明的多端口多频道双向连通式电话通讯装置100来与联机至因特网20的其它全球各地的信息平台,例如为个人计算机21、个人数字助理装置22、移动电话23、网络电话机(IPphone)24、网络可视电话25、公共信息站26、等等,进行网际电话交谈。If the user chooses to use the Internet phone communication function, then he can use the voice input and output functions of the
反之,若使用者选择使用拨接电话通讯功能,则其即可将信息平台10通过本发明的多端口多频道双向连通式电话通讯装置100及公用电话交换网30而联机至全球各地的电话机,包括拨接式电话机31或移动电话32;其中移动电话32可为GSM(Global System for MobileCommunications)式、GPRS(Global Packet Radio Service)或CDMA(Code-Division Multiple Access)等通讯技术;以此来与全球各地的受话端进行拨接电话交谈。Conversely, if the user chooses to use the dial-up telephone communication function, then he can connect the
此外,本发明的多端口多频道双向连通式电话通讯装置100亦可反向地接收因特网20所传送过来的网络电话来电信号、以及公用电话交换网30所传送过来的拨接电话来电信号;亦即本发明的多端口多频道双向连通式电话通讯装置100可让使用者与对方进行双向连通的电话通讯。In addition, the multi-port, multi-channel, two-way communication
图2的系统结构示意图即显示本发明的多端口多频道双向连通式电话通讯装置100的内部系统结构。The schematic diagram of the system structure in FIG. 2 shows the internal system structure of the multi-port multi-channel two-
如图所示,本发明的多端口多频道双向连通式电话通讯装置100的内部系统结构至少包含:(a)一因特网连接端口101;(b)一电话网络连接端口102;(c)一信息平台接口模块103;(d)一按键模块110;(e)一切换模块120;(f)一显示模块130;(g)一因特网网关功能模块(IPgateway)140;(h)一因特网路由功能模块(IP route)150;以及(i)一来电种类判别模块160。As shown in the figure, the internal system structure of the multi-port multi-channel two-way communication type
因特网连接端口101例如为一RJ45连接端口,其可用以将本发明的多端口多频道双向连通式电话通讯装置100外接至一因特网连接接口20A(例如为宽频上网的ATU-R装置)及一调制解调器房20B(例如为宽频上网的ATU-C设备),以以此将本发明的多端口多频道双向连通式电话通讯装置100连接至因特网(Internet)20。The
电话网络连接端口102例如为一RJ11连接端口,其可用以将本发明的多端口多频道双向连通式电话通讯装置100连接至公用电话交换网(PSTN)30。The telephone
信息平台接口模块103用以将本发明的多端口多频道双向连通式电话通讯装置100藕接至一具有语音输出入功能的信息平台10,例如为个人计算机、公共信息站、移动电话、网络可视电话、个人数字助理装置、等等,用以接收该信息平台10所输出的电话语音信号、以及将来电信号转换成该信息平台10的操作系统(例如为Windows或UNIX操作系统)所接受的信号格式。The information
按键模块110包括一网络电话选择键111和一拨接电话选择键112;其中该网络电话选择键111用以让使用者将本发明的多端口多频道双向连通式电话通讯装置100的操作模式切换成网络电话通讯模式,而该拨接电话选择键112则用以让使用者将操作模式切换成拨接电话通讯模式。The
切换模块120至少具有一第一输出入端120a、一第二输出入端120b、和一第三输出入端120c;其中该第三输出入端120c连接至信息平台接口模块103。此切换模块120受控于按键模块110;亦即其可于网络电话选择键111被使用者按下时,将第三输出入端120c切换至第一输出入端120a;并在拨接电话选择键1 12被使用者按下时,将第三输出入端120c切换至第一输出入端120a。The
显示模块130包括一网络电话显示器131和一拨接电话显示器132;其中该网络电话显示器131用以显示目前的操作模式为网络电话通讯模式,而该拨接电话显示器132则是用以显示目前的操作模式为拨接电话通讯模式。The
在实际应用时,若使用者欲使用网络电话通讯功能来发电给一连接至因特网20的受话者,则首先须按下按键模块110的网络电话选择键111;此即可致使切换模块120将其第三输出入端120c切换至其第一输出入端120a,并同时点亮显示模块130的网络电话显示器131。当切换模块120将其第三输出入端120c切换至其第一输出入端120a时,其即将信息平台接口模块103连接至因特网网关功能模块140、因特网路由功能模块150、和因特网连接端口101,使得信息平台10所发出的电话语音信号可首先经由因特网网关功能模块140将其转换成因特网信号格式;再接着经由因特网路由功能模块150来执行信号路由程序,以此将电话语音信号传送至指定的受话端。In actual application, if the user wants to use the Internet phone communication function to generate electricity to a receiver connected to the Internet 20, he must first press the Internet
在此网络电话通讯模式下,本发明的多端口多频道双向连通式电话通讯装置100可由一设定模块151来将各个受话端的电话号码及网络地址(IP address)预先设定至因特网路由功能模块150之中,即可使得本发明的多端口多频道双向连通式电话通讯装置100可联机至任何一个连接至信息平台10的受话端,以此达成[固定网络地址对动态网络地址]和[动态网络地址对动态网络地址]的网络电话通讯功能。In this network telephone communication mode, the multi-port multi-channel two-way communication
此外,若使用者欲使用拨接电话通讯功能来发电给一连接至公用电话交换网(PSTN)30的受话者,则首先须按下按键模块110的拨接电话选择键112;此即可致使切换模块120将其第三输出入端120c切换至其第二输出入端120b,并同时点亮显示模块130的拨接电话显示器132。当切换模块120将其第三输出入端120c切换至其第二输出入端120b时,即将信息平台接口模块103连接至电话网络连接端口102,使得信息平台10所发出的电话语音信号可经由电话网络连接端口102而连接至公用电话交换网(PSTN)30,以此将电话语音信号传送至连接至公用电话交换网(PSTN)30的指定受话端。In addition, if the user wants to use the dial-up telephone communication function to generate electricity to a receiver connected to the public switched telephone network (PSTN) 30, he must first press the dial-up
除了上述的向外联机的网络电话通讯功能和拨接电话通讯功能之外,本发明的多端口多频道双向连通式电话通讯装置100亦可提供向内联机的网络电话通讯功能和拨接电话通讯功能;亦即本发明的多端口多频道双向连通式电话通讯装置100亦可接收任何一台连接至因特网20的信息平台,例如为图1所示的个人计算机21、个人数字助理装置22、移动电话23、网络电话机24、网络可视电话25、或公共信息站26、等等,所发出的网络电话信号;并亦可接收任何一台连接至公用电话交换网(PSTN)30的电话机,例如为图1所示的拨接式电话机31或移动电话32,所发出的拨接电话信号。In addition to the above-mentioned outgoing Internet phone communication function and dial-in phone communication function, the multi-port multi-channel two-way communication
当本发明的多端口多频道双向连通式电话通讯装置100接收到一来电信号时,其即可由其中的来电种类判别模块160来判别出该来电信号为一网络电话信号或为一拨接电话信号。When the multi-port multi-channel two-way connection type
若来电信号为一网络电话信号,则来电种类判别模块160即令显示模块130点亮网络电话显示器131,以此告知使用者按下按键模块110中的网络电话选择键111,即可致使切换模块120将其第三输出入端120c切换至其第一输出入端120a,以此将因特网连接端口101所接收到的来电信号切换至信息平台接口模块103并进而传送至信息平台10。If the incoming call signal is an Internet phone signal, then the incoming call
反之,若来电信号为一拨接电话信号,则来电种类判别模块160即令显示模块130点亮拨接电话显示器132,以此告知使用者按下按键模块110中的拨接电话选择键112,即可致使切换模块120将其第三输出入端120c切换至其第二输出入端120b,以此将电话网络连接端口102所接收到的来电信号切换至信息平台接口模块103并进而至传送至信息平台10。Conversely, if the incoming call signal is a dialing and receiving call signal, the incoming call
其中,该网络电话显示器131可与网络电话选择键111邻近设置,而该拨接电话显示器132可与拨接电话选择键112邻近设置,因此,当任一显示器131、132点亮时,即可让使用者迅速以及立即选择出与该点亮显示器较近的一选择键。Wherein, the
再者,使用者除按压该选择键111、112以令该切换模块120将其第一输出入端120a或第二输出入端120b端所接收到的来电信号切换至信息平台接口模块103并进而至传送至信息平台10之外,亦可由该来电判别模块160根据来电信号的优先级来令该切换模块120将其第三输出入端120c切换至其第一输出入端120a或第二输出入端120b,以此提供使用者自动切换的处理功能。Furthermore, the user presses the
综而言之,本发明提供了一种新颖的多端口多频道双向连通式电话通讯装置,其可适用于搭接至一具有语音输出入功能的信息平台;且其特点在于可用以让该信息平台选择性地通过其来连接至因特网或公用电话交换网,以此让使用者可选择性地使用网络电话通讯功能或传统的拨接电话通讯功能。本发明的优点在于可提供多频道的双向连通式的网络电话通讯功能和拨接电话通讯功能,并可提供[固定网络地址对动态网络地址]和[动态网络地址对动态网络地址]的网络电话通讯功能,因此较现有技术具有更佳的创造性及实用性。To sum up, the present invention provides a novel multi-port multi-channel two-way communication telephone communication device, which can be adapted to be connected to an information platform with voice input and output functions; and its feature is that it can be used to make the information The platform selectively connects to the Internet or the public switched telephone network through it, so that users can selectively use the Internet telephone communication function or the traditional dial-up telephone communication function. The advantage of the present invention is that it can provide multi-channel two-way connected network telephone communication function and dial-in telephone communication function, and can provide network telephone of [fixed network address to dynamic network address] and [dynamic network address to dynamic network address] Communication function, so it has better creativity and practicality than the prior art.
以上所述仅为本发明的较佳实施例而已,并非用以限定本发明的实质技术内容的范围。本发明的实质技术内容广义地定义于权利要求书中。任何他人所完成的技术实体或方法,若是与权利要求书所定义者为完全相同、或是为一种等效的变更,均将被视为涵盖于此专利范围之中。The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the scope of the substantive technical content of the present invention. The substantive technical content of the present invention is broadly defined in the claims. Any technical entity or method completed by others, if it is exactly the same as that defined in the claims, or if it is an equivalent change, will be deemed to be covered by the scope of this patent.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02107169CN1444370A (en) | 2002-03-13 | 2002-03-13 | Multi-port multi-channel two-way communication telephone communication device |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02107169CN1444370A (en) | 2002-03-13 | 2002-03-13 | Multi-port multi-channel two-way communication telephone communication device |
| Publication Number | Publication Date |
|---|---|
| CN1444370Atrue CN1444370A (en) | 2003-09-24 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02107169PendingCN1444370A (en) | 2002-03-13 | 2002-03-13 | Multi-port multi-channel two-way communication telephone communication device |
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