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404 条记录 (耗时 0.016 秒)

    A telecommunication system and a linecard
    1.
    发明公开
    A telecommunication system and a linecard 失效
    电信系统和线路卡。

    公开(公告)号：EP0616482A3

    公开(公告)日：1997-12-03

    申请号：EP94200595.0

    申请日：1994-03-09

    申请人： Philips Electronics N.V.

    发明人： Maas, René ,  Hesdahl, Piet Gerard

    IPC分类号： H04Q11/04 ,  H04M11/06 ,  H04M3/00

    CPC分类号： H04Q11/0442

    摘要： Telecommunication systems (1) such as PABXs are known which comprise ISDN digital linecards (4, 5, 6) with a number of ISDN basic access interfaces (20, 21). A telecommunication device (1) is proposed comprising configurable ISDN digital linecards (4, 5, 6). To this end the linecards (4, 5, 6) are provided with configuration means for independently configuring each ISDN basic access interface (20, 21) with respect to the other ISDN basic access interfaces (20, 21) as to mode setting and phantom power feeding to the transmission line (7, 9) to be coupled to the interface (20, 21). The modes to be set are ISDN-NT or ISDN-TE mode. It is achieved that the PABX (1) can be set to customer specifications without customer specific linecards (4, 5, 6) having to be manufactured. Accordingly, no high manufacturing change-over costs are involved and no expensive extra documentation sets have to be drawn up, as would have been the case when many customer specific linecards (4, 5, 6) would have to be manufactured.

    Equalizer - matched filter combination
    7.
    发明公开
    Equalizer - matched filter combination 失效
    Zusammensetzung von Entzerrer und angepasstem过滤器。

    公开(公告)号：EP0644677A1

    公开(公告)日：1995-03-22

    申请号：EP94202629.5

    申请日：1994-09-13

    申请人： PHILIPS ELECTRONICS N.V.

    发明人： Russell, Mark Alan ,  Sluijter, Robert Johannes ,  Bergmans, Johannes Wilhelmus Maria

    IPC分类号： H04L25/03

    CPC分类号： H04L25/03146

    摘要： In a transmission system digital symbols a k are applied to a transmitter (2) which comprises a low-pass filter (50) and an FM modulator (52). The output signal of the transmitter (2) is transmitted to the receiver (6) via the channel (4). After the received signal has been filtered by a bandpass filter (54) and subsequently demodulated by an FM demodulator (56), a demodulated signal is obtained. To suppress noise signals of which the power spectrum increases with frequency, a predetection filter (60) is present between the subtracter circuit (58) and the detector (62). To compensate for the intersymbol interference generated by the predetection filter (60), a second input of the subtracter circuit (58) is supplied with a scaled version of the symbol â k-1 .

    摘要翻译： 在传输系统中，将数字符号ak应用于包括低通滤波器（50）和FM调制器（52）的发射机（2）。 发射机（2）的输出信号通过信道（4）发送到接收机（6）。 在接收到的信号已被带通滤波器（54）滤波并且随后由FM解调器（56）解调后，获得解调信号。 为了抑制功率谱随频率增加的噪声信号，预滤波器（60）存在于减法器电路（58）和检测器（62）之间。 为了补偿由预检测滤波器（60）产生的符号间干扰，减法器电路（58）的第二输入端被提供符号-I-1的缩放版本。

    Telecommunication network
    9.
    发明公开
    Telecommunication network 失效
    Telekommunikationsnetzwerk。

    公开(公告)号：EP0624971A1

    公开(公告)日：1994-11-17

    申请号：EP94201233.7

    申请日：1994-05-03

    申请人： PHILIPS ELECTRONICS N.V.

    发明人： Marechal, Guy Noel Léon Joseph

    IPC分类号： H04N1/32

    CPC分类号： H04N1/32112 ,  H04L63/0442 ,  H04L63/126 ,  H04N1/32122 ,  H04N2201/3204 ,  H04N2201/3205 ,  H04N2201/3233 ,  H04N2201/3235 ,  H04N2201/3269 ,  H04N2201/3278

    摘要： In known telecommunication networks users (4-1 ... 4-M) of a facsimile machine (2-1 ... 2-N) are not identified. As a result, no evidential value relating to the identity of the sending user (4-3) or the identity of the receiving user (4-M) and the originality of the contents of the facsimile message can be derived from messages sent by facsimile machines (2-1 ... 2-N). A telecommunication network (1) according to the invention comprises identification means (3) for processing a user identification signal (USID). The identification means (3) are also arranged for producing a message (40) encrypted according to a digital signature method, which message states that a facsimile message has been exchanged between a sending user (4-3) and a receiving user (4-M). The message (40) is produced in a machine-readable code. Since this message (40) can only be generated by the identification means (3) and the contents cannot be modified unnoticed later on, this is proof of an exchange of a facsimile message between the sending user (4-3) and the receiving user (4-M).

    摘要翻译： 在已知的电信网络中，传真机（2-1 ... 2-N）的用户（4-1 ... 4-M）未被识别。 因此，与传真用户（4-3）的身份或接收用户（4-M）的身份有关的证据价值和传真消息的内容的原创性可以从传真发送的消息中导出 机器（2-1 ... 2-N）。 根据本发明的电信网络（1）包括用于处理用户识别信号（USID）的识别装置（3）。 识别装置（3）还被布置为产生根据数字签名方法加密的消息（40），该消息指出在发送用户（4-3）和接收用户（4-3）之间交换了传真消息， M）。 消息（40）以机器可读代码生成。 由于该消息（40）只能由识别装置（3）产生，并且不能随后修改内容，所以这是发送用户（4-3）和接收用户之间的传真消息交换的证明 （4-M）。

    End station for wire telecommunication
    10.
    发明公开
    End station for wire telecommunication 失效
    有线电信终端站

    公开(公告)号：EP0581372A3

    公开(公告)日：1994-08-31

    申请号：EP93202147.0

    申请日：1993-07-22

    申请人： Philips Electronics N.V.

    发明人： Mulder, Jacob, c/o INT. OCTROOIBUREAU B.V.

    IPC分类号： H04M1/00 ,  H04M1/60

    CPC分类号： H04M1/76 ,  H04M1/6025

    摘要： In end stations (1) for wire telecommunication, network managers pose different requirements on the terminating impedance (Z s ) of the end station (1) for terminating the line to which the end station (1) is connected. For satisfying these requirements there is proposed to provide that the terminating impedance (Z s ) of the end station (1) can be matched with a predetermined line impedance (Z₁) by means of a control arrangement (5). The control arrangement (5) thereto comprises an EEPROM (13) in which information for a control signal can be stored for biasing a line coupling arrangement (4) connected to the control arrangement (5), in which line coupling arrangement a variable terminating impedance (Z s ) which can be biased is realised, preferably in the form of a switched capacitor filter (23). As a result, when production is switched over to the production of end stations (1) for a specific network manager, the EEPROM (13) may be simply reprogrammed to have the end station (1) satisfy the network manager's requirements with respect to terminating impedance (Z s ).

    摘要翻译： 在用于有线通信的终端站（1）中，网络管理员对终端站（1）的终端阻抗（Zs）提出了不同的要求，用于端接终端站（1）所连接的线路。 为了满足这些要求，建议规定终端站（1）的终端阻抗（Zs）可以通过控制装置（5）与预定的线路阻抗（Z 1）相匹配。 其控制装置（5）包括EEPROM（13），其中可存储用于控制信号的信息以偏置连接到控制装置（5）的线路耦合装置（4），其中线路耦合装置具有可变的终端阻抗 （Zs），其优选以开关电容滤波器（23）的形式实现。 结果，当生产切换到特定网络管理器的终端站（1）的生产时，可以简单地重新编程EEPROM（13）以使终端站（1）满足网络管理者关于终止 阻抗（Zs）。