Abstract:
Adjunct apparatus for increasing network transmission capacity provides a low-cost, efficient solution for increasing the network transmission capacity of the existing telephone circuit switched network, while keeping the current network equipment unchanged. A Local Switch Network (LSN) Adjunct (LSNA) and a Tandem/Toll Switch Network (TSN) Adjunct (TSNA) interface with standard network elements, such as switches and cross connect equipment. These network adjuncts, comprising a set of low-bit rate speech coders, a dynamic timeslot manager and other supporting functions, advantageously transmit to and receive from a T1/T3/OC3/E1 trunk. More than one channel of voice is carried on one 64 Kbps DS0 timeslot, while still maintaining the voice at toll quality. A sub-timeslot and sub-timeslot bundling are introduced in the standard T1 or E1 frame where each sub-timeslot is analogous to a single bit of the typical eight bit word to provide more than 24 or 30 voice channels respectively. Inband control information is generated for carrying over a T1 or E1 trunk, for example, for mapping sub-timeslot bundles to channels. Conventional out-of-band signaling is provided via SS-7 or other out-of-band signaling system.
Abstract translation:用于增加网络传输容量的辅助设备为保持现有网络设备不变而提供现有电话交换网络的网络传输容量的低成本,高效解决方案。 具有标准网元(如交换机和交叉连接设备)的本地交换机网络(LSN)辅助(LSNA)和串联/收费交换网络(TSN)辅助(TSNA)接口。 这些网络附件,包括一组低比特率语音编码器,动态时隙管理器和其他支持功能,有利地发送到T1 / T3 / OC3 / E1中继线并从T1 / T3 / OC3 / E1中继线接收。 一个64Kbps的DS0时隙上携带多个语音通道,同时仍然保持语音通话质量。 在标准T1或E1帧中引入子时隙和子时隙捆绑,其中每个子时隙类似于典型8位字的单个比特,以分别提供超过24或30个语音信道。 生成用于携带T1或E1中继线的带内控制信息,例如用于将子时隙束映射到信道。 通过SS-7或其他带外信令系统提供传统的带外信令。
Abstract:
According to this invention, a digital key telephone system connected to an analog public network NW having a function of transmitting a ringing signal including identification information of a calling line through a subscriber line (CO line), accommodating a plurality of extension lines each connected to a digital key telephone (DKT) 2 or a standard telephone (STT) 4 as an extension terminal, and having a function of switching and connecting the subscriber line to the plurality of extension lines or the extension lines to each other includes a called party storage means storing, in advance, information representing the correlation between the calling line and the extension terminals 2 and 4 as a called terminal. When a ringing signal arrives from the analog communication network NW, calling line identification information (caller ID) contained in the ringing signal is detected by a calling line identification information interface unit (RCIU) 12. A control unit (RCTU) 16 determines the called extension terminal on the basis of the detected caller ID and the information stored in the storage means, so the extension terminal receives the call from the digital key telephone interface unit (RDKU) 13 or a standard telephone interface unit (RSTU) 15.
Abstract:
The call reestablishment system functions to provide the user with the ability to replace an existing communication connection with another equivalent communication connection in an automated manner that does not disrupt the existing call and to also provide the user with the ability to create a replacement communication connection using a different common carrier as the billing source. The call reestablishment system is activated when a party on an existing communication connection generates feature activation control signals indicative of the desire to access the call reestablishment system. The serving communication system, in response to receipt of the feature activation control signals, enables the requesting party to input data indicative of the nature of the call reestablishment that is required. The call reestablishment system is responsive to this data for creating a replacement communication connection for the existing communication connection and, once the facilities are in place to enable the calling and called parties to communicate, the call reestablishment system automatically transfers the calling and called parties from the original communication connection to this newly established communication connection in a manner that is transparent to the parties and without loss of any communications.
Abstract:
A long distance service bureau assists subscribers in selecting a long distance carrier for a long distance, or tariff, call. The long distance service bureau includes a rate table memory and a service logic element. The rate table memory stores rate data, representing tolls charged by various long distance carriers, and subscriber preference data, representing a subscriber's preferences for certain ones of the various long distance carriers. The service logic element controls the rate table memory. The service logic element periodically communicates with the various long distance carriers to retrieve rate data changes, stores the rate data changes in the rate table memory, and downloads only the rate data changes to local equipment of the subscriber during idle periods of the subscriber's local equipment.
Abstract:
Providing capability for increasing, decreasing, or changing types of bandwidth associated with a telecommunication call during the call and through out the call path. New messages can allocate or deallocate bandwidth associated with the call at each intervening switching node through out the call path. All switching nodes of a switching system involved with the resulting call consider the call as a single call. The new messages allow adding video capability to a voice call and, at a still later point in time, removing the video capability from the call. The result is convenience to telecommunication users in that the user is able to utilize any type or amount of bandwidth during a multimedia call. Yet, at any given point in time, the user pays only for the bandwidth that is being utilized.
Abstract:
A data communication method in which a transmitting station divides data into a plurality of data blocks and transmits the data blocks in parallel through a plurality of communication lines, and a receiving station receives the data blocks transmitted from the transmitting station through the plurality of communication lines and composes the data blocks into original data. In the data communication method, it is detected that a new transmission request is present during a parallel data transmission through a plurality of communication lines, one or more of the communication lines are released to continuously use the remaining communication lines for the parallel data transmission in response to the detected new transmission request, and a new data transmission is performed through the released communication line or lines.
Abstract:
For use with a telephone switching system serving a plurality of stations and having a central processor for generating data messages and a ringing circuit for generating ringing signals to a selected station, method and apparatus are disclosed for sending a data message to a selected station during a silent interval between ringing signals. The apparatus includes a detector and a sender. Responsive to a first ringing signal, the detector generates a status signal representative of the silent interval between ringing signals. During the silent interval, the sender sends to the selected station a frequency shift keyed signal representative of the data message.
Abstract:
A method includes receiving a query from an external entity for information about a call between a first user and a second user, determining a call identifier associated with the call and providing the call identifier to the external entity. Subsequently, when a request to alter the call and comprising the call identifier is received from the external entity, the call is altered the call in accordance with the request.
Abstract:
A method and computer program product which allows both phone-based and IP-based clients to participate in a single audio conference. The method enables at least two multi-point control units (MCUs) (i.e., conferencing servers) to connect via a standard data linkage (i.e., full-duplex dial-up or IP link). The method and computer program product enables the phone-based MCU to handle the phone clients and the IP-based MCU to handle the IP-based clients, while connecting the two to allow each participating client to hear all other participating clients.
Abstract:
A method and computer program product which allows both phone-based and IP-based clients to participate in a single audio conference. The method enables at least two multi-point control units (MCUs) (i.e., conferencing servers) to connect via a standard data linkage (i.e., full-duplex dial-up or IP link). The method and computer program product enables the phone-based MCU to handle the phone clients and the IP-based MCU to handle the IP-based clients, while connecting the two to allow each participating client to hear all other participating clients.