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    Called equipment selection method in ISDN packet switching mode and packet switching system for digital network
    22.
    发明授权
    Called equipment selection method in ISDN packet switching mode and packet switching system for digital network 失效
    ISDN分组交换模式下的被叫设备选择方法和数字网络的分组交换系统

    公开(公告)号：US5459721A

    公开(公告)日：1995-10-17

    申请号：US261383

    申请日：1994-06-15

    Applicant: Atsumasa Yoshida

    Inventor： Atsumasa Yoshida

    IPC: H04M3/00 ,  H04L29/06 ,  H04Q11/04 ,  H04L12/56

    CPC classification number: H04Q11/0457 ,  H04L29/06 ,  H04Q2213/102 ,  H04Q2213/216 ,  H04Q2213/296

    Abstract: A packet switching method in a digital network includes a calling equipment and called equipment connected to the digital network for communication by packet switching, and further includes a destination end system to be connected to the called equipment for communication. Upon occurrence of a call demand by the calling equipment, a sub-address of the called equipment and a network address of the destination end system are inserted in a call demand packet and the call demand packet is transmitted to the digital network. Upon reception of a call setup message by the called equipment from the digital network which receives the call demand packet, the sub-address from the call setup message is extracted and a judgement is made as to whether the incoming call is designated to own equipment by checking matching of the extracted sub-address and a given sub-address assigned to own equipment. A response message to the digital network is transmitted when the incoming call is judged to designate own equipment. Upon the called equipment's reception of an incoming call packet which was transmitted by the digital network after receiving the response message, the network address from the incoming call packet is extracted and incoming call processing is performed based on the extracted network address for establishing the call.

    Abstract translation: 数字网络中的分组交换方法包括通过分组交换连接到数字网络的呼叫设备和被叫设备，并且还包括要连接到被叫设备进行通信的目的地端系统。 在呼叫设备发出呼叫请求时，被叫设备的子地址和目的地端系统的网络地址被插入到呼叫需求分组中，并且呼叫需求分组被发送到数字网络。 在被叫设备从接收到呼叫请求分组的数字网络接收到呼叫建立消息时，提取来自呼叫建立消息的子地址，并且通过以下方式判断来电是否被指定给自己的设备： 检查提取的子地址和分配给自己的设备的给定子地址的匹配。 当来电呼叫被判断为指定自己的设备时，发送到数字网络的响应消息。 在被叫设备接收到数字网络在接收到响应消息后发送的呼入分组之后，提取来自呼入分组的网络地址，并根据所提取的建立呼叫的网络地址进行呼入处理。

    Network terminating terminal apparatus for integrated services digital network
    24.
    发明授权
    Network terminating terminal apparatus for integrated services digital network 失效
    用于综合业务数字网络的网络终端设备

    公开(公告)号：US5204860A

    公开(公告)日：1993-04-20

    申请号：US622631

    申请日：1990-12-05

    Applicant: Thomas C. Sparks

    Inventor： Thomas C. Sparks

    IPC: H04J3/12 ,  H04Q11/04

    CPC classification number: H04J3/12 ,  H04Q11/0471 ,  H04Q2213/176 ,  H04Q2213/214 ,  H04Q2213/216 ,  H04Q2213/36

    Abstract: Network terminating terminal apparatus, for use in an Integrated Services Digital Network, comprises a U-interface and a S/T interface. The U-interface allows the integrated terminal apparatus to communicate with a central office directly, without a separate network terminator. Remote terminals may be connected to the network terminating terminal apparatus, via its S/T interface. The network terminating terminal apparatus then serves as a conventional network terminator. The network terminating terminal apparatus includes circuitry for controlling D-channel access by the integrated terminal apparatus. The circuitry detects the framing of the signal received at the U-interface and the D-channel information from the remote terminals and ensures that the D-channel data from the integrated terminal apparatus is supplied to the S/T interface at the appropriate time for insertion into the D-echo channel of the signal returned to the remote terminals. In addition, the D-channel data from the integrated terminal apparatus is supplied to the U interface, with the D-channel from remote terminals, for transmission in D-channel of the signal to the central office.

    Abstract translation: 用于综合业务数字网络的网络终端终端装置包括U接口和S / T接口。 U接口允许集成终端设备直接与中心局进行通信，而无需单独的网络终端。 远程终端可以通过其S / T接口连接到网络终端终端设备。 网络终端终端装置然后用作传统的网络终端。 网络终端终端装置包括用于控制集成终端装置的D信道接入的电路。 该电路检测在U接口接收的信号的成帧和来自远程终端的D信道信息，并确保来自集成终端设备的D信道数据在适当的时间被提供给S / T接口 插入D-echo信道的信号返回到远程终端。 此外，来自集成终端装置的D信道数据被提供给U接口，其中来自远程终端的D信道用于在信号的D信道中传输到中心局。

    Apparatus and method for efficiently coupling digital signals to a communications medium in information packets
    25.
    发明授权
    Apparatus and method for efficiently coupling digital signals to a communications medium in information packets 失效
    将数字信号有效耦合到信息包中的通信介质的装置和方法

    公开(公告)号：US5056088A

    公开(公告)日：1991-10-08

    申请号：US345912

    申请日：1989-05-01

    Applicant: John D. Price ,  Ralph E. Richardson

    Inventor： John D. Price ,  Ralph E. Richardson

    IPC: H04L29/06 ,  H04L29/08 ,  H04Q11/04

    CPC classification number: H04L29/06 ,  H04Q11/0471 ,  H04L69/28 ,  H04L69/324 ,  H04Q2213/214 ,  H04Q2213/216 ,  H04Q2213/296

    Abstract: An improved Packet Assembler/Disassembler (PAD) optimizes the assembling of characters into packets for transmission over a packet network. The PAD is arranged to operably connect to and receive character asynchronous data from one or more terminal instruments operating in either a block transfer mode or an echoplexing mode. Characters received by the PAD from a terminal instrument operating in an echoplexing mode are forwarded with no PAD delay. Characters received by the PAD from a terminal instrument operating in a block transfer mode are similarly forwarded with no PAD delay and in full packets with the exception of the last few characters of each block of characters which only partially fill their respective packets. And these partially filled packets are quickly forwarded in a time period which just exceeds the period required for the reception of a single character at the rate of data reception from the terminal instrument.

    ISDN, basic rate interface arranged for quad voice
    26.
    发明授权
    ISDN, basic rate interface arranged for quad voice 失效
    ISDN，基本速率接口排列为四声道

    公开(公告)号：US4970723A

    公开(公告)日：1990-11-13

    申请号：US251483

    申请日：1988-09-30

    Applicant: T. P. Lin

    Inventor： T. P. Lin

    IPC: H04Q3/58 ,  H04Q11/04

    CPC classification number: H04Q11/0442 ,  H04Q11/0471 ,  H04Q2213/034 ,  H04Q2213/216 ,  H04Q2213/299 ,  H04Q2213/363

    Abstract: A single international standard integrated services digital network (ISDN), basic rate interface (BRI) is arranged so that either a data terminal and two voice terminals, three voice terminals, or four voice terminals can be operated simultaneously through the interface. Code converters, associated with the voice terminals and with a central office switch, convert eight-bit voice sample code from either the voice terminals or the central office switch to four-bit voice sample code in the interface to enable the bit streams of two voice terminals to be merged for transmission through a single B-channel at the interface. When two voice terminals are operated simultaneously through one B-channel, each of those terminals positions four-bit coded voice samples in a different sub B-channel of the B-channel and stuffs four bits in the other sub B-channel. Four-bit coded voice samples from the sub B-channels are converted to voice samples in the voice terminals and to eight-bit codes voice samples in the central office switch.

    Local communication system among ISDN terminal equipments
    27.
    发明授权
    Local communication system among ISDN terminal equipments 失效
    ISDN终端设备之间的本地通信系统

    公开(公告)号：US4792800A

    公开(公告)日：1988-12-20

    申请号：US883402

    申请日：1986-07-08

    Applicant: Masanobu Fujioka ,  Yoshikazu Ikeda ,  Nobuo Furuya

    Inventor： Masanobu Fujioka ,  Yoshikazu Ikeda ,  Nobuo Furuya

    IPC: H04Q11/04

    CPC classification number: H04Q11/0471 ,  H04Q2213/216 ,  H04Q2213/22 ,  H04Q2213/299

    Abstract: A local communication system among ISDN terminal equipment in a user's premises are connected to a local passive bus of the LSDN basic-access interface. The present system can establish the local communication through a network termination unit among ISDN termination equipment. In order to establish such a local communication, a multiframing scheme is taken on a passive bus forming multiframes by combining together the predetermined number of frames which are as defined in the I.400 series of CCITT recommendations. The network termination unit has a switching device for coupling two circuit-switched type communication channels (B1, B2) on the passive bus in one direction of transmission with the two other channels (B2, B1) in the other direction to establish local communication. Alternatively, the switching device couples the two channels on the passive bus with those on the subscribed line to establish external communication. Each of the terminal equipments has a device for requesting the local communication when required.

    Abstract translation: 用户场所的ISDN终端设备之间的本地通信系统连接到LSDN基本接入接口的本地无源总线。 本系统可以通过ISDN终端设备之间的网络终端单元建立本地通信。 为了建立这样的本地通信，通过将在I.400系列CCITT建议中定义的预定数量的帧组合在一起，在形成多帧的无源总线上采取多层次方案。 网络终端单元具有切换装置，用于在另一方向上与一个方向的两个通道（B2，B1）在一个无源总线上耦合两个电路交换型通信信道（B1，B2），以建立本地通信。 或者，开关装置将被动总线上的两个通道与订阅的线路上的两个通道耦合，以建立外部通信。 每个终端设备具有当需要时请求本地通信的设备。

    ISDN subscriber terminal control system
    28.
    发明授权
    ISDN subscriber terminal control system 失效
    ISDN用户终端控制系统

    公开(公告)号：US4722082A

    公开(公告)日：1988-01-26

    申请号：US835716

    申请日：1986-03-03

    Applicant: Nobuo Furuya ,  Yoshikazu Ikeda ,  Masanobu Fujioka

    Inventor： Nobuo Furuya ,  Yoshikazu Ikeda ,  Masanobu Fujioka

    IPC: H04Q5/20 ,  H04M9/00 ,  H04Q11/04

    CPC classification number: H04Q11/0471 ,  H04Q2213/179 ,  H04Q2213/204 ,  H04Q2213/216 ,  H04Q2213/22 ,  H04Q2213/299

    Abstract: The ISDN user-network interface is defined in the CCITT D-channel protocol recommendation (I-400 series recommendations), in which many kinds of communication terminals (e.g. faximile, telephone, teletex, etc.) can communicate through a subscriber line. The user-network interface is improved from the view point of effectiveness of terminal usage, provision of communication service, and, flexibility of system configuration, by providing a control terminal in the subscriber. The control terminal doubles as ordinary terminal equipment, and has a global control function for controlling other subscriber terminal equipment. The control terminal establishes and/or releases a local control phase in which a control terminal controls ordinary terminal equipment in the same subscriber to have them correspond to the communication with another subscriber using the means which belong to the ordinary terminal equipment inherently. The control terminal operates as an ordinary terminal apparatus when it is not in local control phase.

    Abstract translation: ISDN用户网络接口在CCITT D信道协议推荐（I-400系列建议）中定义，其中许多种类的通信终端（例如传真，电话，电信等）可以通过用户线进行通信。 通过在用户中提供控制终端，从终端使用的有效性，提供通信服务以及系统配置的灵活性的角度改进了用户网络接口。 控制终端兼作普通终端设备，具有控制其他用户终端设备的全局控制功能。 控制终端建立和/或释放本地控制阶段，其中控制终端控制同一用户中的普通终端设备使其与其他用户的通信对应，使用属于普通终端设备的装置。 当不在本地控制阶段时，控制终端作为普通终端设备工作。

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