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    Telecommunication plant in which a wide-band channel if wanted is connected by the side of a telephone connection
    1.
    发明授权
    Telecommunication plant in which a wide-band channel if wanted is connected by the side of a telephone connection 失效
    如果想要的话，宽带频道的通信工厂通过电话连接侧连接

    公开(公告)号：US3922491A

    公开(公告)日：1975-11-25

    申请号：US42445973

    申请日：1973-12-13

    Applicant: ERICSSON TELEFON AB L M

    Inventor： BJORK HAROLD JOHN CARL ,  CAROC TORBEN ERIK

    IPC: H04Q3/00 ,  H04M11/00

    CPC classification number: H04Q3/00

    Abstract: In a telecommunication system, a wide-band channel when desired is connected next to a telephone connection by a system which comprises a first line system intended for telephone traffic and a second line system with wide-band communication channels intended for data transmission, picture transmission, etc. At least some subscribers have a special apparatus for wide-band connections and an apparatus attachment by the side of a subscriber''s telephone. The high operating costs for a wide-band connection requires that the connection not be established before it is actually to be used and that it be released after use without the telephone connection being disconnected and restored. Thus, a picture transmission can be connected and disconnected several times during a telephone call but it is inconvenient to send a subscriber''s telephone number each time, and no changes in the telephone exchange can be accepted. According to the invention each of such subscribers has at least one change-over switch in his apparatus attachment under control of the subscriber. When a wide-band connection is required between the two parties in an arranged telephone connection, each of the parties operates his change-over switch which causes a call to a control center and the setting of a signal connection. There is also initiated a signal interchange between the subscriber''s equipments via the arranged telephone connection utilized by the control center for connecting the special apparatus of the subscribers via a wide-band connection.

    Abstract translation: 在电信系统中，当需要时，宽带信道通过包括用于电话业务的第一线路系统和具有用于数据传输的宽带通信信道的第二线路系统的系统连接在电话连接旁边，图像传输 等等。至少一些用户具有用于宽带连接的专用设备和用户电话侧的装置附件。 宽带连接的高运行成本要求在实际使用之前不建立连接，并且在使用之后释放连接，而不会断开和恢复电话连接。 因此，在电话呼叫期间，可以连接和断开图像传输多次，但是每次发送用户的电话号码都是不方便的，并且不能接受电话交换机的改变。 根据本发明，在用户的控制下，每个这样的用户在他的装置附件中具有至少一个转换开关。 当在安排的电话连接中双方之间需要宽带连接时，每个方操作他的转换开关，该切换开关导致对控制中心的呼叫和信号连接的设置。 还通过由控制中心利用的布置的电话连接，在用户设备之间发起信号交换，用于经由宽带连接连接用户的专用设备。

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