CN1319361C

CN1319361C - Impulse dialing system of modem of networked telephone and its method

Info

Publication number: CN1319361C
Application number: CNB021321507A
Authority: CN
Inventors: 黄英杰; 黄志成; 吴忠和
Original assignee: Hon Hai Precision Industry Co Ltd
Current assignee: Hon Hai Precision Industry Co Ltd
Priority date: 2002-09-03
Filing date: 2002-09-03
Publication date: 2007-05-30
Anticipated expiration: 2022-09-03
Also published as: CN1481140A

Abstract

The present invention provides a method for generating a pulse-dialing signal to a public switching telephone network (PSTN) by utilizing a network telephone modem. The network telephone modem comprises a relay, wherein the relay is used for selectively and electrically connecting a telephone to the PSTN or a subscriber loop interface circuit (SLIC) in the network telephone modem. The method comprises that the relay is controlled to alternately and electrically connect the telephone to the PSTN or even the SLIC according to digitals in a telephone number dialed by a user; thus, the switching times between the PSTN and the SLIC are equal to the digitals.

Description

The arteries and veins dial system and the method thereof of modem of network telephone

Technical field

The present invention relates to a kind of modem of network telephone (VoIP modem), relate in particular to a kind of modem of network telephone that single relay just can be finished pulse dialing that only comprises.

Background technology

Gradually general along with high-speed Internet, (Voice over InternetProtocol, use VoIP) is also on the occasion of at that time for the networking telephone.In modem of network telephone, user loop interface circuit (subscriber line interface circuit, SLIC) be intended for the interface of telephone set analog signal and networking telephone digital signal, by modem of network telephone, the user can utilize the telephone set machine to dial network telephone.Use the main benefit of the networking telephone to be, compared with the call rate of PSTN as the telephone set of conversation pipeline, with network as the call rate of the networking telephone of conversation pipeline will be cheaply how.Yet the speech quality of the networking telephone is unstable, and especially when running into emergency, the user of the networking telephone does not wish that more this moment, problem on online appearred in the networking telephone.Therefore, just arisen at the historic moment with the modem of network telephone of traditional PSTN as auxiliary conversation pipeline, in the modem of network telephone of this type, if the user dials an emergency number that is stored in especially in advance in this modem of network telephone, for example similarly be 119,110 etc., then this modem of network telephone can then utilize PSTN to set up comparatively stable conversation pipeline, rather than as situation utilize network as the conversation pipeline.

Please refer to Fig. 1, Fig. 1 is known to the functional block diagram of PSTN as the dial system 10 of the modem of network telephone of auxiliary conversation pipeline, system 10 comprises a modem of network telephone 11 and a telephone set 12, telephone set 12 is communicated to a PSTN 14, thereby can set up conversation with other party in a conventional manner by PSTN, in addition, telephone set is communicated to networking telephone network 13 by modem of network telephone 11 again, thereby telephone set 12 also can be set up conversation by networking telephone network and other party.Modem of network telephone 11 includes the interface that a user loop interface circuit 18 is used as analog signal commentaries on classics and digital signal, one relay 16 is used for optionally telephone set 12 being electrically connected to PSTN 14 or being connected to user loop interface circuit 18, one Digital System Processor (digital signal processor) 20, it is electrically connected on user loop interface circuit 18 and relay 16, being used for control relay 16 is electrically connected to telephone set 12 PSTN 14 or is connected to user loop interface circuit 18, one double-tone multifrequency coupling circuit (Dual Tone Multi-Frequency coupling circuit, DTMF couplingcircuit) 22, when the user utilize modem of network telephone 11 dial one be stored in especially in advance in the modem of network telephone 11 telephone number the time, dual-tone multifrequency coupling circuit 22 redials signal (DTMF redial signal) with a double-tone multifrequency and is coupled to PSTN 14 from user loop interface circuit 18, that is, redial operation in the mode of multifrequency.Modem of network telephone 11 also includes other circuit 21.

Relay 16 is a mechanical relay, and telephone set 12 can be electrically connected to PSTN 14 respectively or be connected to user loop interface circuit 18 in the mode that once only is electrically connected a kind of device, 20 control relays of Digital System Processor 16 switch to and fro according to the controlling signal that is reached relay 16 by Digital System Processor 20.

All built-in multiple frequency type dialing mode of most telephone set (tone-dialing) and pulse dialing pattern (pulse-dialing), but the redialing function of 11 built-in multiple frequency types of unfortunately known modem of network telephone (being the dual-tone multifrequency formula), and can't provide the redialing function of pulsed.

Summary of the invention

Therefore the object of the present invention is to provide a kind of modem of network telephone, it only comprises single relay just can finish pulse dialing, have the simple advantage of circuit configurations, and improvement known network telephone modem can't carry out the shortcoming of pulsed redialing function.

The dial system of modem of network telephone of the present invention comprises: a user loop interface circuit, it is as the interface of analog signal of telephone set and the digital signal of the networking telephone, one relay, it is used for that a telephone set optionally is electrically connected to a PSTN or is connected to user loop interface circuit in the modem of network telephone, an and controller, it is electrically connected to this user loop interface circuit and reaches to this relay, be used for receiving the telephone number that a user dials and be used for controlling this relay this telephone set alternately is electrically connected to this PSTN and is connected to this user loop interface circuit, so that this telephone set switches each numeral that the number of times that is electrically connected equals this telephone number between this PSTN and this user loop interface circuit, use producing the pulse dialing signal to this PSTN.

Description of drawings

Fig. 1 is for knowing the dial system functional block diagram of modem of network telephone.

Fig. 2 is the dial system functional block diagram of modem of network telephone of the present invention.

Fig. 3 is the oscillogram of the pulse dialing signal of the dial system of modem of network telephone of the present invention.

Embodiment

Please refer to Fig. 2, Fig. 2 for the present invention with dial system 100 functional block diagram of a PSTN 140 as the modem of network telephone of auxiliary conversation pipeline, the dial system 100 of modem of network telephone of the present invention can allow the telephone set 120 of a use pulse dialing pattern redial telephone number to a PSTN 140 with the pulse dialing pattern via a modem of network telephone 110.Above-mentioned program can be finished by an interior pulse dialing control module 240 that is built in the Digital System Processor 200, each numeral of the telephone number that pulse dialing control module 240 reception one users dial, and control that a relay 160 alternately is electrically connected to PSTN 140 with telephone set 120 and to user loop interface circuit 180, telephone set 120 switches the number of times that is electrically connected and equals each numeral in this telephone number between PSTN 140 and user loop interface circuit 180, to produce the pulse dialing signal to PSTN 140.

In preferred embodiment of the present invention, the networking telephone pattern that is initially set of modem of network telephone 110 that is to say that relay 160 is that telephone set 120 is electrically connected to user loop interface circuit 180.When modem of network telephone 110 is in closed condition (turn off), Digital System Processor 200 control relays 160 automatically are electrically connected to PSTN 140 with telephone set 120, so that the user can be directly via PSTN 140 and other party communication.Because so, even if modem of network telephone 110 without any power supply, telephone set 120 still can be via PSTN 140 and other party communication.

When modem of network telephone 110 is in networking telephone pattern, if the telephone number of the phone that the user dialed meets in the modem of network telephone 110 institute's telephone number of storage in advance, 110 dialing modes with pulsed of modem of network telephone redial this telephone number automatically to PSTN 140, to set up conversation by more stable PSTN 140.In the present invention, except original relay 160, modem of network telephone 110 does not need to set up ruined outer relay and produces and call required pulse dialing signal.The mode that modem of network telephone 110 produces the pulse dialing signals is a transfer relay 160 so that telephone set 120 alternately is electrically connected between PSTN 140 and the user loop interface circuit 180, and telephone set 120 alternately is electrically connected on each numeral in this telephone number that number of times between PSTN 140 and the user loop interface circuit 180 just equals the user and dialed, and the change action of relay 160 is controlled by the pulse dialing control modules 240 in the Digital System Processor 200.

Please refer to Fig. 3, Fig. 3 is the oscillogram of the pulse dialing signal of dial system 100, transverse axis among Fig. 3 is represented the time, waveform A represents the signal that reaches relay 160 from Digital System Processor 200 interior pulse dialing control modules 240, and waveform B is represented the status of electrically connecting between telephone set 120 and the PSTN 140.In the waveform B, logical one represents telephone set 120 for just being electrically connected on PSTN 140, is also referred to as the state (promptly mentioning receiver) of ' OFF-HOOK '; Logical zero then represents telephone set 120 for just being electrically connected on user loop interface circuit 80, is also referred to as the state (promptly hanging up receiver) of ' ON-HOOK '.

When the program of pulse dialing control module 240 starting impulses dialing, it at first can be electrically connected to PSTN 140 with telephone set 120 by control relay 160, (PrivateBranch exchange PBX) will learn that telephone set 120 is in the state of ' OFF-HOOK ' to switch subsequently.Shown in the waveform A among Fig. 3, pulse dialing control module 240 transmits a logical zero signal to relay 160 when time t0, this logical zero signal causes relay 160 that telephone set 120 is electrically connected to PSTN 140, waveform B then shows this kind status of electrically connecting when time t0, logical one represents telephone set 120 for just being electrically connected on PSTN 140.

In case when telephone set 120 is in the state of ' OFF-HOOK ', just can call by the dial system 100 of modem of network telephone.For instance, Fig. 3 shows the production process of the dial impulse signal of numeral " 3 ", pulse dialing control module 240 transmits a logical one controlling signal to relay 160 when time t1, this logical one controlling signal causes relay 160 that telephone set 120 is electrically connected to user loop interface module 180, just the state of ' ON-HOOK '.Same, when time t 1, what the logical zero of waveform B was represented is that telephone set 120 is not electrically connected to PSTN 140 this moment.Passed through a period of time, pulse dialing control module 240 transmits a logical zero controlling signal to relay 160 when time t2, passed through a period of time again, pulse dialing control module 240 transmits a logical one controlling signal to relay 160 when time t3, so far, first pulse produces, and the time distance between time t1 and time t3 is approximately 50 milliseconds.Above-mentioned program continues carrying out always, till producing three pulses.At last, when time t4, the pulse of three generations is all one after the other sent out, and telephone set 120 also reverts to the state of ' OFF-HOOK ' again, shown in waveform B, telephone set 120 when time t4 for just being electrically connected to PSTN 140.

Compared to the prior art, the dial system 100 of modem of network telephone of the present invention only utilizes single relay just can have the pulse dialing function, this single relay just telephone set alternately is electrically connected to PSTN or to the user loop interface module to produce the pulse dialing signal.Just because of only need single relay, so the manufacturing cost of the dial system of modem of network telephone provided by the present invention is quite cheap.

The above only is preferred embodiment of the present invention, and all equalizations of doing according to claim of the present invention change and modify, and all should belong to the covering scope of patent of the present invention.

Claims

1. method of utilizing a networking telephone to produce pulse dialing signal to a PSTN, this networking telephone includes a relay, be used for that a telephone set optionally is connected to this PSTN or be connected to a client end interface circuit in this networking telephone, this method includes:

This telephone set alternately is connected to this PSTN and is connected to this client end interface circuit according to each digital control this relay in the telephone number so that the number of times that switches between this PSTN and this client end interface circuit equals this numeral.

2. networking telephone pulse dialing system, this system includes:

One client end interface circuit is used for converting the analog signal that a telephone set is sent to digital signal;

One relay is used for this telephone set optionally is connected to a PSTN or is connected to this client end interface circuit; And

One controller is connected between this client end interface circuit and this relay, is used for controlling this relay, equals each numeral in the telephone number so that this telephone set alternately is connected to the number of times of this PSTN and this client end interface circuit.

3. system as claimed in claim 2, wherein this controller is a Digital System Processor.

4. method of utilizing a networking telephone to produce pulse dialing signal to a PSTN, this networking telephone includes a controller and a relay, this relay is used for that a telephone set optionally is connected to this PSTN or is connected to a client end interface circuit in this networking telephone, and this method includes:

Receive a telephone number by this controller; And

Control this relay by this controller this telephone set alternately is connected to this PSTN and this client end interface circuit, its number of times that alternately connects equals each numeral in this telephone number, to produce different pulse dialing signals to this PSTN.