TW578421B - Pulse dialing system for VoIP modem - Google Patents

Description

578421 V. Description of the invention (1) Field of the invention The present invention provides an Internet telephone modem (VOIP modem), especially an Internet telephone modem that can perform pulse dialing with only a single relay. BACKGROUND OF THE INVENTION With the Internet Protocol of the high-speed Internet, in a telephone modem, a user returns to an interface circuit, and a digital telephone can be used by a telephone to dial. Compared with a public call fee, it is better to use the Internet. too much. However, when the network encounters an emergency, there is a problem in the connection of the Internet call. As the type of Internet call data of the auxiliary call channel, if the Internet call data 11 19, 110, etc. exist, the Internet call network is established From now on, the more stable VoIP (road VoIP) road interface (SLIC) interface is used, and the telephone call through the Internet is the access phone of the call management telephone. Therefore, in Internet telephones, the number of calls in a fixed number of telephones in a telephone is often used. Online

(Subscr i ber 1 i ne is used as a telephone analog signal through the Internet phone modem, use home. The main use of Internet phone two, the telephone line of the telephone line 1 is not stable, especially for I π does not even want the network number at this time 摅 μ = 乂 Change the telephone network modem to emerge as the times require.

If the user 搽 cooking = Γ dials a special advance = electric bluff code in | Ϊ, for example, according to the opportunity II% taxi 疋 instead use public exchange instead of ordinary circumstances

578421

Use the network as the channel for the call. Use the reference picture—the same network as the channel ^: ί i: use the public 5 for the telephone network as the auxiliary communication system 1 〇 Include a network / mine # f machine dial The functional block diagram of the system 10 is connected to a prostitute ▲ machine two modem 1 1 and a telephone 12 2 'telephone 12 2 built with other parties; ΐ 电话 telephone network I4' can therefore be traditionally used PSTN Party 11 is connected to the Internet. In addition, the telephone set is connected to the Internet 5 via the Internet telephone modem, and the network 5 is I3 '. Therefore, the telephone set 12 can also use the network loop interface circuit. ㈣Telephone data 1 * -user plane, successively Ϊ 18 is used as a relay between analog signal conversion and digital signal. ^ _ Dili 16 is used to selectively connect the telephone 12 to the public switch 6 · 、 ·· 1 4 or to the user circuit interface circuit 1 8 ′ — Digital signal processing (into the Slgnal processor) 20, which is electrically connected to the user return, 1; & Road 18 and relay 16, used to control the relay 16 Connect the telephone 12 I. Public switched telephone network 14 or to the user loop interface circuit 18, Dual Tone Multi-Frequency coupling circuit (DTMF coupling circuit) 22, when used 2 Zhoulu telephone modem 1 1 When dialing a phone number that is stored in the IP phone 11 in advance, the dual-tone multi-frequency light-combination circuit 2 2 will send a pair of dual-frequency redial signals (DTMF redial signal ) From the user loop interface, connect 18 to the public switched telephone network 14, that is, perform a redial operation in a multi-frequency manner. The VoIP modem 1 1 contains other circuits 2 丄. Relay 16 is a mechanical relay, and can switch the phone 2

578421 V. Description of the invention (3) Ϊ Ϊ: Ϊ The device is electrically connected to the public switched telephone network 14 or 1 μ ^ ^ interface circuit 18, and the digital signal processor 20 controls the Leiden cut " ί The control signal transmitted from the bit signal processor 20 to the relay 16 back and forth ^ Most telephones have built-in multi-frequency dialing mode, pulse dialing mode (pulse, dialing), but ^ e ^ ialmg) and Internet telephone modem 11 The purpose and summary of the invention of the redial function of the multi-frequency type (ie, double phase full phase, which is known, but cannot provide the pulse redial function. S, type) Therefore, the object of the present invention is to provide a network including A single relay can complete the pulse dialing, which has a modem, which only includes the advantages, and improves the lack of the ability of the conventional internet telephone modem to have a simple road structure. Line pulse type redial function The dialing system of the Internet telephone modem of the present invention includes a one-sided circuit, which is used as a telephone analog signal 1: an interface for a subscriber loop signal, and a relay, which is used to transfer The electric = digital telephone is digitally connected to a public switched telephone network or to a network, optionally a user circuit interface circuit, and a controller, which is a circuit interface circuit in the electric modem and to the relay, Used to receive a call back number connected to the user and used to control the relay to temporarily connect the phone dialed by the user X to the public telephone

578421

Description of the invention (4) The number of the co-switched telephone network and the number of connections to the public switched telephone is equal to the numbers of the signal to the public switched to the subscriber circuit interface network and the subscriber circuit interface telephone numbers. Circuit to switch the circuit between the telephone's circuit to generate pulse dialing. Detailed description of the invention Please refer to FIG. 2. FIG. 2 shows a public switched telephone network of the present invention.

1 40 Dial-up system of Internet telephone modem as an auxiliary communication channel 1 00 $ Function block diagram 'The dial-up system of Internet telephone modem of the present invention 1 00 can enable a telephone using pulse dialing mode 1 2 0 Redial a telephone number to a public switched telephone network 1 40 via an IP telephone modem 110 in a pulse dialing mode. The above procedure can be completed by a pulse dialing control module 24 built in a digital signal processor 2000. The pulse dialing control group 240 receives each digit of a telephone number dialed by a user and controls a relay 160 The telephone 120 is alternately electrically connected to the public switched telephone circuit 140 and the user circuit interface circuit 180, and the telephone 12 is switched between the public switching circuit 2 i 3 and the user interface circuit 180. Decode each digit in the code to generate a pulse dial signal to the public parent telephone network 14 0.

In the initial setting: At the beginning of the Internet telephone modem u 0 Μ 1 ^ ^ ^ σ type, that is to say, the relay 160 is a telephone user circuit interface circuit 180. When Internet phone modem

Page 8 578421 V. Description of the invention (5) In the closed state (tUrn ff), the digital signal processor 200 controls the circuit ^ Γ Γ automatically connects the telephone set 1 2 0 to the public switched telephone network and 11, 2 to The user can directly access the public switched telephone network 140 Hedian 3. Because of this, even if the IP phone modem 110 is not connected, the phone 120 can still be used by other parties via the public switched telephone network 140. When the IP phone modem Π 〇 is in the IP phone mode, The phone number is a phone number that conforms to the type of Internet phone modem 110. The Internet phone modem 110 will redial the phone number to the public switched telephone network book I with a pulse of 140 and dial the core. A more stable public switched telephone network 140 establishes a call. In addition to the original relay 16 0, the IP phone modem 110 will send the following information: a. Set up an additional relay to generate the pulse dialing drag required to make a call, and the way telephone modem 110 will generate a pulse dialing signal. In order to cut the fault, the device 1 60 is alternately electrically connected to the public switched telephone mine, check 0 and the user circuit interface circuit 1 800, and the telephone 1 2 0 is alternated to the public switched telephone. The f number of the network 140 and the user circuit interface circuit 18-i is equal to the number of the telephone number dialed by the user = 2 and the switching action of the relay 16 is performed by the digital signal processor 2 00. Controlled by the pulse dial control module 24o. Figure 3 is the pulse dialing signal of the dialing system 100. Please refer to the figure. Wave 7 Figure ′ The horizontal axis in Figure 2 represents time, and waveform A represents the digital signal.

578421 V. Description of the invention (6), the signal 'waveform B' transmitted by the pulse dialing control module 240 in the controller 200 to the relay 160 represents the electrical connection between the telephone i 2〇 and the public switched telephone network 1 4 0 status. In waveform B, the logic "1" represents the state that the telephone 120 is electrically connected to the public switched telephone network 140, also known as "OFF-HOOK" (that is, lifting the handset); and the logic "0" represents the telephone 1 2 0 is connected to the user circuit interface circuit 80, also known as ON-HOOK (ie, the bass drum is hung). " When the pulse dialing control module 2 40 starts the pulse dialing procedure, it will first control the relay 160 to electrically connect the telephone 120 to the public switched telephone network 140, and then the private branch exchange (PBX) You will know that the phone 120 is in the OFF-HOOK state. As shown by the waveform A in Figure 3, the pulse dial control module 2 40 sends a logic `` 0 π signal to the relay 16 0 at time t 0, and the logic '' 0 π signal will cause the relay 1 6 0 to Telephone 1 2 0 is electrically connected to the public switched telephone network 1 4 0. Waveform B displays this electrical connection status at 10 o'clock. The logic "; [" represents that telephone 1 2 0 is positively connected to the public switched telephone network. Road 1 4 0. Once the telephone set 120 is in the OFF-HOOK state, the call can be made through the dialing system 100 of the Internet telephone modem. For example, Figure 3 shows the process of generating the dial pulse signal of the number "3". The pulse dial control module 2 4 0 transmits a logic π 1 "control signal to the relay 1 6 0 at time 11. The logic " The 1π control signal causes the relay 16 to electrically connect the telephone 120 to the subscriber loop interface module 180, that is, on-HOOK, the

Page 10 578421 V. Description of the invention (7) Status. Similarly, at time 11:00, the logic “0” of the waveform B represents that the telephone 120 is not electrically connected to the public switched telephone network 14 at this time. After a period of time, the pulse dial control module 2 4 0 transmits a logic 0π control signal to the relay 1 6 0 at 12 o'clock, and after a period of time, the pulse dial control module 240 transmits a logic " at time 13 The Γ control signal reaches the relay 160. At this point, the first pulse has been generated, and the time interval between the time u and the time u is about 5032 seconds. The above procedure continues until three pulses are generated. Finally, at time t4, the three generated pulses have been phased out and transmitted to the ground, and the telephone set 120 has also been restored to 〇FF-Η〇〇κ. As shown in waveform B, the telephone set 1 2 〇 At 14:00, it was connected to the public switched telephone network 140. Compared with the known technology, the dialing system of the network telephone modem of the present invention, ', 0 ^ can have the function of pulse dialing by using only a single relay | §; Connects to a public switched telephone network 2-sided module to generate a pulse dial signal. ^ Because only the manufacturing system is required, the manufacturing cost of the dialing system of the Internet telephone modem provided by the present invention is relatively low. In the embodiment, any application according to the present invention shall fall within the scope of the patent of the present invention. The above description is only an equivalent range of the modified disk modification cover made by the preferred patent scope of the present invention. ≫ 578421 Simple illustration of the diagram Simple illustration of the diagram Figure 1 is a functional block diagram of the dial-up system of the conventional internet telephone modem. Figure 2 is a functional block diagram of the dialing system of the internet telephone modem of the present invention. FIG. 3 is a waveform diagram of a pulse dialing signal of a dialing system of a network telephone modem of the present invention. Explanation of Symbols in the Drawings 1 0, 1 0 0 Internet Phone Modem Dialing System 1 1, 1 1 0 Internet Phone Modem 12, 120 Phone 13, 130 Internet Phone Network 1 4, 1 4 0 Public Switched Telephone Network 1 6 1 6 0 Relay 18 180 User circuit interface circuit 2 0 2 0 0 Digital signal processor 210 Other circuits 240 Pulse dial control module

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Claims (1)

578421 6. Scope of patent application 1. A method for generating a pulse dialing signal to a public switched telephone network (PSTN) by using a voice over Internet protocol modem (VoIP modem) Method, the Internet telephone includes a relay, which is used to selectively connect a telephone to the public switched telephone network or to a subscriber line interface circuit (SLIC) in the Internet telephone The method includes: controlling the relay to alternately connect the telephone to the public switched telephone network and to the user interface circuit to enable the public switched telephone network and the user terminal according to each number in a telephone number. The number of switching between interface circuits is equal to this number. 2. An Internet telephone pulse dialing system, the system includes: a user interface circuit, which is used to convert analog signals sent by a telephone into digital signals; a relay, which is used to selectively select the telephone Ground is connected to a public switched telephone network or to the user interface circuit; and a controller is connected between the user interface circuit and the relay to control the relay so that the telephone is alternately connected to The number of times of the public switched telephone network and the client interface circuit is equal to each number in a telephone number. 3 · If the system of item 2 of the patent application scope, wherein the controller is a number Page 13 578421 6. Scope of patent application Digital signal processor. 4. A method for generating a pulse dial signal to a public switched telephone network using an Internet telephone, the Internet telephone includes a controller and a relay, the relay is used to selectively connect a telephone to the public Switching a telephone network or connecting to a user interface circuit in the Internet telephone, the method includes: receiving a telephone number by the controller; and The controller controls the relay to alternately connect the telephone to the public switched telephone network and the user interface circuit, and the number of alternate connections is equal to each digit in the telephone number to generate different pulse dial signals to the Public switched telephone network. Page 14