WO2011150646A1 - 生成电话振铃信号的方法、装置及系统 - Google Patents

生成电话振铃信号的方法、装置及系统 Download PDF

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Publication number
WO2011150646A1
WO2011150646A1 PCT/CN2010/080004 CN2010080004W WO2011150646A1 WO 2011150646 A1 WO2011150646 A1 WO 2011150646A1 CN 2010080004 W CN2010080004 W CN 2010080004W WO 2011150646 A1 WO2011150646 A1 WO 2011150646A1
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Prior art keywords
ringing
transformer
signal
telephone
generating
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PCT/CN2010/080004
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English (en)
French (fr)
Inventor
高兴国
赵治磊
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华为技术有限公司
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Priority to PCT/CN2010/080004 priority Critical patent/WO2011150646A1/zh
Priority to CN2010800130541A priority patent/CN102301690A/zh
Publication of WO2011150646A1 publication Critical patent/WO2011150646A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M19/00Current supply arrangements for telephone systems
    • H04M19/02Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone

Definitions

  • the present invention relates to the field of communications, and in particular, to a method, apparatus and system for generating a telephone ringing signal.
  • the ringing signals provided by the traditional Public Switched Telephone Network (PSTN) are basically unbalanced ringing, and the AC signal of the unbalanced ringing ring is transmitted on only one subscriber line. As shown in Fig. 1, it is a common unbalanced ringing mode in which the ringing current is on the ring line, and the DC offset of the ringing current (generally -48V) is also on the ring line.
  • PSTN Public Switched Telephone Network
  • Balanced ringing means that the ringing current exists on two subscriber lines, which are a pair of differential signals of opposite amplitude and opposite phase, as shown in Figure 2:
  • the ringing current is on two lines, and the DC offset for the ringing current is available through software.
  • Programmatically set in general, the value set is the DC offset between the tip-ring is 20V.
  • the traditional PSTN uses the unbalanced ringing mode
  • some terminals are also designed for unbalanced ringing, and can only be adapted to the unbalanced ringing.
  • Balanced ringing does not work on some traditional unbalanced ringing terminals.
  • operators usually need to set up separate unbalanced ringing generation devices.
  • the ringing generation device serves a small number of traditional terminals, and the maintenance cost of the device is high, resulting in waste of resources.
  • a method of generating a telephone ringing signal includes the following steps:
  • the subscriber line interface circuit SLIC generates a ringing ringing bell
  • the ringing signal of the unbalanced ringing is transmitted to the user terminal through the ringing Ring line.
  • a device for generating a telephone ringing signal comprising: a subscriber line interface circuit SLIC for generating a ringing stream of balanced ringing;
  • a transformer connected to the subscriber line interface circuit SLIC, for converting the balanced ringing current into a ringing signal of unbalanced ringing;
  • An off-hook detection circuit is connected to the transformer, and includes a sampling resistor R and a comparator connected in series with the Ring line for detecting an output off-hook signal.
  • a telephone communication system comprising:
  • the central office device is located between the upper communication network and the user terminal, and is used to implement voice communication of the user terminal;
  • a user terminal connected to the upper layer communication network by the central office device, for receiving a voice signal of the user
  • the central office device further includes generating a telephone ringing signal unit, the generating a telephone ringing signal unit comprising:
  • a subscriber line interface circuit SLIC which is used to generate a ringing stream of balanced ringing
  • a transformer connected to the subscriber line interface circuit SLIC, for converting the balanced ringing current into a ringing signal of unbalanced ringing;
  • An off-hook detection circuit is connected to the transformer, and includes a sampling resistor R and a comparator connected in series with the Ring line for detecting an output off-hook signal.
  • the embodiment of the present invention converts a telephone ringing signal generated by a subscriber line interface circuit SLIC by setting a transformer, so that one central office equipment can provide a plurality of telephone ringing signals, and the method can be Maximize the types of user terminals that can be supported by a single central office device, fully exploit the potential of the outgoing device, and significantly reduce the cost of network construction for operators.
  • Figure 1 is a schematic diagram of a conventional unbalanced ringing mode
  • FIG. 2 is a schematic diagram of a conventional balanced ringing mode
  • FIG. 3 is a schematic diagram of a system architecture of the present invention.
  • FIG. 4 is a schematic structural diagram of a circuit for generating a telephone ringing signal unit according to a first embodiment of the present invention
  • FIG. 5 is a schematic structural diagram of a circuit for generating a telephone ringing signal unit according to a second embodiment of the present invention
  • a flow chart for generating a telephone ringing signal
  • Figure 7 is a flow chart showing the generation of a telephone ringing signal in accordance with a second embodiment of the present invention. detailed description
  • the architecture of the telephone communication system of the present invention is shown in FIG. 3.
  • the telephone communication system includes: a user terminal 12 and a central office device 16.
  • the user terminal 12 is typically a telephone that is linked to the central office device 16 via a telephone line 14 and to the upper layer communication network via the central office device 16 for receiving voice signals from the user.
  • the central office device 16 is located between the upper layer communication network and the user terminal, and is used to implement voice communication of the user terminal.
  • the central office device 16 includes a housing (not shown) and a generated telephone ringing signal unit 18, which generates a telephone ringing signal unit 18 for generating a telephone ringing signal, and generates a telephone ringing signal unit when the user terminal 12 is called. 18 can generate a telephone ringing signal and send the telephone ringing signal to the user terminal 12 via the telephone line 14, and the user terminal 12 rings after receiving the telephone ringing signal to alert the user to answer the incoming call.
  • the circuit structure of the generated telephone ringing signal unit 18 of the first embodiment of the present invention is as shown in FIG. 4, and includes: a subscriber line interface circuit SLIC22, a transformer 24, and an off-hook detection circuit 26.
  • the subscriber line interface circuit 22 is configured to generate a balanced ringing ring; the transformer 24, typically a 1:1 transformer, is coupled to the subscriber line interface circuit 22 for converting the balanced ringing current generated by the subscriber line interface circuit 22.
  • the ringing signal for unbalanced ringing; the off-hook detection circuit 26 is connected to the transformer 24 for detecting the output off-hook signal, and further includes a sampling resistor 27 and a comparator 28 connected in series with the Ring line.
  • the Tip wire is grounded via relay 29, and the DC power source Vdc30 provides a DC bias for the ringing current.
  • the process of generating a telephone ringing signal is as shown in FIG. 6, and specifically includes the following steps: In the first step, the subscriber line interface circuit SLIC22 generates a ringing ringing tone;
  • the balanced ringing current is converted into a ringing signal of the unbalanced ringing through the transformer 24.
  • the ringing signal of the unbalanced ringing is transmitted to the user terminal 12 through the ringing Ring line.
  • the circuit structure of the generated telephone ringing signal unit 18 of the second embodiment of the present invention is as shown in FIG. 5, and includes: a subscriber line interface circuit SLIC32, a transformer 34, and an off-hook detection circuit 36.
  • the subscriber line interface circuit 32 is configured to generate a low amplitude unbalanced ringing ringing current; the transformer 34, typically a 1:2 or 1:3 transformer, is coupled to the subscriber line interface circuit 32 for the subscriber line The low-amplitude unbalanced ringing current generated by the interface circuit 32 is converted into a high-amplitude unbalanced ringing ringing signal; the off-hook detecting circuit 36 is connected to the transformer 34 for detecting the output off-hook signal, and the specific structure and the first implementation The examples are the same and will not be repeated.
  • the prompting Tip line also uses the subscriber line interface circuit 32.
  • the original Tip line, DC power supply Vdc30 provides DC bias for the ringing current.
  • the process of generating a telephone ringing signal is as shown in FIG. 7, and specifically includes the following steps: In the first step, the subscriber line interface circuit SLIC32 generates a ringing flow of low amplitude unbalanced ringing; and second, the balancing The ringing current is converted by the transformer 34 into a ringing signal of high amplitude unbalanced ringing; in the third step, the ringing signal of the high amplitude unbalanced ringing is transmitted to the user terminal 12 through the ringing Ring line.
  • the present invention converts the telephone ringing signal generated by the subscriber line interface circuit SLIC according to actual needs by setting a transformer, so that one central office equipment can provide multiple telephone ringing signals.
  • This method can maximize the types of user terminals that a single central office device can support, fully utilize the potential of the outgoing device, and significantly reduce the network construction cost of the operator.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Telephonic Communication Services (AREA)
  • Devices For Supply Of Signal Current (AREA)

Description

生成电话振 IHT号的方法、 装置及系统 技术领域
本发明涉及通信领域, 尤其涉及一种生成电话振铃信号的方法、装置及系 统。
背景技术
传统的公众电话交换网络(PSTN )提供的振铃信号基本上都是非平衡振 铃, 非平衡振铃铃流的交流信号只在一条用户线上传输。 如图 1所示, 为一种 应用比较普遍的非平衡振铃模式, 铃流在 ring线上, 且铃流的直流偏置(一般 为- 48V )也在 ring线上。
而随着芯片技术的发展, 目前主流的芯片都提供平衡振铃方案。 平衡振铃 就是铃流存在于两条用户线上, 是幅度相同相位相反的一对差分信号, 如图 2 所示: 铃流处于两条线上, 对于铃流的直流偏置是可以通过软件编程设置的, 一般情况下, 设置的值是 tip - ring间的直流偏置是 20V。
但是, 由于传统的 PSTN—直使用的是非平衡振铃的方式, 一些终端也是 针对非平衡振铃而设计的, 只能够和非平衡振铃适配, 当铃流模式转换为平衡 振铃时候, 平衡振铃无法在一些传统的非平衡振铃终端上工作。 为了兼容传统 的非平衡振铃终端,运营商通常需要设置单独的非平衡振铃生成设备, 随着网 络的升级,传统的非平衡振铃终端逐渐减少,但是运营商仍然需要保留单独的 非平衡振铃生成设备来为少数传统的终端服务,设备的维护成本很高,造成资 源的浪费。
发明内容
本发明的目的在于提供一种能够同时提供多种电话振铃信号的方法、装置 及系统。
本发明的技术方案:
一种生成电话振铃信号的方法, 包括以下步骤:
用户线接口电路 SLIC产生平衡振铃的铃流;
所述平衡铃流通过变压器转换为非平衡振铃的铃流信号;
所述非平衡振铃的铃流信号通过振铃 Ring线传递到用户终端。
一种生成电话振铃信号的装置, 包括: 用户线接口电路 SLIC , 用于产生平衡振铃的铃流;
变压器, 连接到所述用户线接口电路 SLIC, 用于将所述平衡铃流转换为 非平衡振铃的铃流信号;
摘机检测电路, 连接到所述变压器, 包括 Ring线串接的采样电阻 R和比 较器, 用于检测输出摘机信号。
一种电话通信系统, 包括:
局端设备,位于上层通信网络和用户终端之间, 用于实现用户终端的语音 通信;
用户终端, 通过所述局端设备与上层通信网络相连,用于接收用户的语音 信号;
其特征在于:
所述局端设备进一步包括生成电话振铃信号单元,所述生成电话振铃信号 单元包括:
用户线接口电路 SLIC, 用于产生平衡振铃的铃流;
变压器, 连接到所述用户线接口电路 SLIC, 用于将所述平衡铃流转换为 非平衡振铃的铃流信号;
摘机检测电路, 连接到所述变压器, 包括 Ring线串接的采样电阻 R和比 较器, 用于检测输出摘机信号。
本发明的有益效果: 本发明的实施例通过设置变压器,将用户线接口电路 SLIC产生的电话振铃信号进行转换, 从而使得一台局端设备可以提供多种电 话振铃信号,通过本方法可以最大限度扩展单一局端设备所能支持的用户终端 种类, 充分发挥出局端设备的潜能, 显著降低运营商的建网成本。
附图说明
图 1为现有的非平衡振铃模式示意图;
图 2为现有的平衡振铃模式示意图;
图 3为本发明的系统架构示意图;
图 4为本发明第一实施例的生成电话振铃信号单元电路结构示意图; 图 5为本发明第二实施例的生成电话振铃信号单元电路结构示意图; 图 6为本发明第一实施例的生成电话振铃信号的流程图;
图 7为本发明第二实施例的生成电话振铃信号的流程图。 具体实施方式
本发明的电话通信系统的架构如图 3所示, 该电话通信系统包括: 用户终 端 12以及局端设备 16。 用户终端 12通常为电话机, 其通过电话线 14与局端 设备 16链接, 并通过局端设备 16与上层通信网络相连, 用于接收用户的语音 信号。 局端设备 16位于上层通信网络和用户终端之间, 用于实现用户终端的 语音通信。
局端设备 16包括壳体(图未示)以及生成电话振铃信号单元 18, 生成电 话振铃信号单元 18用于生成电话振铃信号, 当用户终端 12被呼叫时,生成电 话振铃信号单元 18可以生成电话振铃信号并且把电话振铃信号通过电话线 14 发送给用户终端 12, 用户终端 12在接收到电话振铃信号后响铃, 提醒用户接 听来电。
本发明第一实施例的生成电话振铃信号单元 18的电路结构如图 4所示, 包括: 用户线接口电路 SLIC22、 变压器 24 以及摘机检测电路 26。 其中, 用 户线接口电路 22用于产生平衡振铃的铃流; 变压器 24, 通常为 1 :1变压器, 其连接到用户线接口电路 22, 用于将用户线接口电路 22产生的平衡铃流转换 为非平衡振铃的铃流信号; 摘机检测电路 26连接到变压器 24, 用于检测输出 摘机信号, 进一步包括与 Ring线串接的采样电阻 27和比较器 28。 当需要提 供振铃信号时, 提示 Tip线通过继电器 29接地, 直流电源 Vdc30则为铃流提 供直流偏置。
在本实施例中,生成电话振铃信号的过程如图 6所示,具体包括以下步骤: 第一步, 用户线接口电路 SLIC22产生平衡振铃的铃流;
第二步, 该平衡铃流通过变压器 24转换为非平衡振铃的铃流信号; 第三步, 该非平衡振铃的铃流信号通过振铃 Ring线传递到用户终端 12。 本发明第二实施例的生成电话振铃信号单元 18的电路结构如图 5所示, 包括: 用户线接口电路 SLIC32、 变压器 34 以及摘机检测电路 36。 其中, 用 户线接口电路 32, 用于产生低幅度的非平衡振铃的铃流; 变压器 34, 通常为 1:2或 1 :3 变压器, 其连接到用户线接口电路 32, 用于将用户线接口电路 32 产生的低幅度的非平衡铃流转换为高幅度的非平衡振铃的铃流信号;摘机检测 电路 36连接到变压器 34, 用于检测输出摘机信号, 具体结构与第一实施例相 同, 不再重述。 当需要提供振铃信号时, 提示 Tip线还使用用户线接口电路 32 原有的 Tip线, 直流电源 Vdc30则为铃流提供直流偏置。
在本实施例中,生成电话振铃信号的过程如图 7所示,具体包括以下步骤: 第一步, 用户线接口电路 SLIC32产生低幅度非平衡振铃的铃流; 第二步,该平衡铃流通过变压器 34转换为高幅度非平衡振铃的铃流信号; 第三步, 该高幅度非平衡振铃的铃流信号通过振铃 Ring线传递到用户终 端 12。
通过以上实施例可以看出, 本发明通过设置变压器, 将用户线接口电路 SLIC产生的电话振铃信号根据实际需要进行转换, 从而使得一台局端设备可 以提供多种电话振铃信号。通过本方法可以最大限度扩展单一局端设备所能支 持的用户终端种类,充分发挥出局端设备的潜能,显著降低运营商的建网成本。
以上是对本发明具体实施例的说明,在具体的实施过程中本领域的普通技 术人员可以对本发明的方案进行适当的改进和变更, 以适应具体情况的需要。 因此,本发明的具体实施例只是起示范作用,并不用以限制本发明的保护范围。

Claims

权 利 要 求
1、 一种生成电话振铃信号的方法, 包括以下步骤:
用户线接口电路 SLIC产生平衡振铃的铃流;
所述平衡铃流通过变压器转换为非平衡振铃的铃流信号;
所述非平衡振铃的铃流信号通过振铃 Ring线传递到用户终端。
2、 根据权利要求 1所述的方法, 其特征在于, 所述的变压器为 1 : 1变压 器。
3、 根据权利要求 1所述的方法, 其特征在于, 进一步包括: 提示 Tip线 通过继电器接地, 由直流电源 Vdc提供铃流的直流偏置。
4、 根据权利要求 3所述的方法, 其特征在于, 进一步包括: 与 Ring线串 接的采样电阻 R和比较器组成的摘机检测电路检测输出摘机信号。
5、 一种生成电话振铃信号的装置, 包括:
用户线接口电路 SLIC, 用于产生平衡振铃的铃流;
变压器, 连接到所述用户线接口电路 SLIC, 用于将所述平衡铃流转换为 非平衡振铃的铃流信号;
摘机检测电路, 连接到所述变压器, 包括 Ring线串接的采样电阻 R和比 较器, 用于检测输出摘机信号。
6、 根据权利要求 5所述的生成电话振铃信号的装置, 其特征在于所述的 变压器为 1 :1变压器。
7、 根据权利要求 5所述的生成电话振铃信号的装置, 其特征在于进一步 包括:
提示 Tip线, 所述 Tip线通过继电器接地;
直流电源 Vdc, 为铃流提供直流偏置。
8、 一种生成电话振铃信号的装置, 包括:
用户线接口电路 SLIC, 用于产生低幅度非平衡振铃的铃流;
变压器, 连接到所述用户线接口电路 SLIC, 用于将所述低幅度非平衡铃 流转换为高幅度非平衡振铃的铃流信号;
摘机检测电路, 连接到所述变压器, 包括 Ring线串接的采样电阻 R和比 较器, 用于检测输出摘机信号。
9、 根据权利要求 8所述的生成电话振铃信号的装置, 其特征在于所述的 变压器为 1 :2或 1 :3变压器, 提示 Tip线还使用用户线接口电路 32原有的 Tip 线, 直流电源 Vdc为铃流提供直流偏置。
10、 一种电话通信系统, 包括:
局端设备,位于上层通信网络和用户终端之间, 用于实现用户终端的语音 通信
用户终端, 通过所述局端设备与上层通信网络相连,用于接收用户的语音 信号;
其特征在于:
所述局端设备进一步包括生成电话振铃信号单元,所述生成电话振铃信号 单元包括:
用户线接口电路 SLIC, 用于产生平衡振铃的铃流;
变压器, 连接到所述用户线接口电路 SLIC, 用于将所述平衡铃流转换为 非平衡振铃的铃流信号;
摘机检测电路, 连接到所述变压器, 包括 Ring线串接的采样电阻 R和比 较器, 用于检测输出摘机信号。
11、 根据权利要求 8 所述的电话通信系统, 其特征在于所述的变压器为 1 : 1变压器; 所述的局端设备进一步包括: 提示 Tip线, 所述 Tip线通过继电 器接地; 直流电源 Vdc, 为铃流提供直流偏置。
PCT/CN2010/080004 2010-12-20 2010-12-20 生成电话振铃信号的方法、装置及系统 WO2011150646A1 (zh)

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