CN2731845Y

CN2731845Y - Dual-mode telephone terminal

Info

Publication number: CN2731845Y
Application number: CN 200420092505
Authority: CN
Inventors: 谢健骊; 薛武
Original assignee: Beijing Gongda Digital Technology Co ltd
Current assignee: Beijing Gongda Digital Technology Co ltd
Priority date: 2004-09-15
Filing date: 2004-09-15
Publication date: 2005-10-05
Anticipated expiration: 2014-09-15

Abstract

The utility model discloses a dual-mode telephone terminal, comprising a traditional telephone part which is to realize the function of a PSTN telephone, an IP telephone part which is to realize the function of an IP telephone and a public processing section. Wherein, the traditional telephone part further comprises a dial-up circuit, a message circuit, a ringing circuit, a switch hook circuit, a polarity protection circuit and a PSTN telephone interface. The IP telephone part further comprises a main treatment module which is to realize a core controlled telephone terminal, a memory module, a codec module and one or more internet accesses. The public processing section further comprises an input-output unit and a check control unit. The input-output unit and the check control unit are respectively connected with the dial-up circuit, the ringing circuit and the switch hook circuit of the traditional telephone part. Meanwhile, the input-output unit and the check control unit are connected with the main treatment module of the IP telephone part. The dual-mode telephone terminal can support the VOIP telephone and the PSTN telephone simultaneously, realizing simple structure, simplifying the configuring operation of the IP telephone, flexibly realizing the IP telephone functions for the telephone terminal.

Description

A kind of dual-mode telephone terminal

Technical field

The utility model relates to a kind of telephone terminal, is meant a kind of dual-mode telephone terminal of supporting VOIP phone and traditional public switched telephone network (PSTN) phone simultaneously especially.

Background technology

Along with the continuous expansion of internet application and reaching its maturity with perfect of IP phone, people are more and more, also more and more higher to the understanding and the user demand of IP phone.The advantage of IP phone just is: bandwidth and telephone expenses, and IP phone can be utilized very high bandwidth, multimedia communications such as voice-bearer communication or video; And the rate of IP phone is very low, can make the user reach the purpose of saving cost.Based on this, the application of IP phone is more and more universal.

At present, the basic composition structure of IP phone terminal mainly comprises as shown in Figure 1: main processing block, memory modules, coding/decoding module, network interface and input/output module.Wherein, main processing block is used to carry out system's control, data and signal processing and protocol processes; Memory modules comprises flash memory (FLASH) and synchrodata random access memory (SDRAM) two parts, and FLASH is used to deposit the start-up code of operating system, image file and system's relevant configured parameter of application program; Coding/decoding module is used for the voice signal of I/O is carried out Code And Decode; Input/output module comprises the LCDs that is used to show, the keyboard that is used to import, microphone, loud speaker and receiver etc.; Main processing block links to each other with memory modules, coding/decoding module, network interface and input/output module respectively.

Though IP phone be applied in rapid popularization, but it is well-known, the PSTN net is general, a most universal present network, because the PSTN network is through the development of many decades, not only mature and reliable, and broad covered area, therefore, in quite long period, will face the situation of pstn telephone and IP phone coexistence.And, for any one user, even adopt IP phone, do not want to abandon existing traditional PSTN phone yet, because will oneself use pstn telephone number for a long time to replace with a brand-new IP phone number, will bring a lot of troubles to relatives and friends on every side, cause get in touch with not smooth.So, how pstn telephone and IP phone are merged, utilizing PSTN network and IP network will be very crucial problem comprehensive high-efficiency.

In addition, application for the IP phone terminal, also exist some problems: the use of IP phone need be disposed corresponding network parameter, and domestic consumer and do not understand what is a gateway, what is the gatekeeper, so domestic consumer is difficult to the IP phone terminal of oneself is configured; If certain user has an IP phone terminal respectively in a plurality of different locations, just need dispose respectively and could normally use, very trouble each telephone terminal.

The utility model content

In view of this, main purpose of the present utility model is to provide a kind of dual-mode telephone terminal, make it can support VOIP phone and pstn telephone simultaneously, and implementation structure is simple.

The further purpose of the utility model is to simplify the configuration operation of IP phone, realizes the IP phone function of telephone terminal flexibly.

For achieving the above object, the technical solution of the utility model is achieved in that

A kind of dual-mode telephone terminal, this telephone terminal comprise the black phone part that realizes the pstn telephone function, IP phone part and the common process part that realizes the IP phone function, wherein,

Described black phone part further comprises: dial-up circuit, speaking circuit, ringing circuit, hook switch circuit, polar protective circuit and pstn telephone interface, speaking circuit, hook switch circuit, polar protective circuit and pstn telephone interface are connected successively, and ringing circuit links to each other with the hook switch circuit;

Described IP phone part further comprises: realize main processing block, memory modules, coding/decoding module and one or more network interfaces of the control of telephone terminal core, memory modules, coding/decoding module and all network interfaces all link to each other with main processing block;

Described common process part further comprises: input-output unit and detection control unit, described input-output unit links to each other with dial-up circuit, ringing circuit and the hook switch circuit of black phone part respectively with the detection control unit, simultaneously, input-output unit links to each other by the main processing block of general input and output pin with the IP phone part with the detection control unit.

In the such scheme, described IP phone part further comprises the plugged SIM card module that is used for storing IP phone relevant configuration information, and described sim module links to each other by the main processing block of general input and output pin with the IP phone part.The described SIM card module that plugs is pluggable common SIM card, or is pluggable encrypted card, or for can plug read-write memory.

The input-output unit of described common process part comprises: keyboard or receiver or microphone or loud speaker or four combination, and wherein, keyboard links to each other with the dial-up circuit of black phone part and the main processing block of IP phone part respectively; Receiver links to each other with the speaking circuit of black phone part and the main processing block of IP phone part respectively via relay, and microphone, loud speaker all link to each other with the coding/decoding module of IP phone part.

The detection control unit of described common process part comprises at least: the control of USE lamp, dialing control, ring detection, off-hook detection; Described USE lamp control links to each other with the speaking circuit of black phone part, described dialing control links to each other with the dial-up circuit of black phone part, described ring detection links to each other with the ringing circuit of black phone part, and described off-hook detection links to each other with the hook switch circuit of black phone part; And the control of USE lamp, dialing control, ring detection, off-hook detection all link to each other by the main processing block of general input and output pin with the IP phone part.Wherein, be provided with isolated location between the dial-up circuit of described keyboard and black phone part; Be provided with isolated location between the main processing block of described keyboard and IP phone part.Described isolated location is an electronic switch or for relay or for buffer or for diode.

In the such scheme, described IP phone part further comprises LCDs, and described LCDs links to each other with the main processing block of IP phone part.

Dual-mode telephone terminal provided by the utility model has following advantage and characteristics:

1) traditional PSTN phone and IP phone are become one, the Core Feature of pstn telephone and IP phone realizes that module is relatively independent, but input is shared, this telephone terminal externally can provide pstn telephone interface and IP network mouth simultaneously, so, make the user both support the PSTN business, support the ip voice business again by a telephone terminal, convenient for users to use, also avoided the user need put the situation of tradition and two phones of VOIP in order to use IP phone simultaneously.

2) for each dual-mode telephone terminal, corresponding two telephone numbers, one of them is the pstn telephone number, another is the IP phone number, can make the user like this when using new IP phone, still keep original pstn telephone number, oneself and other people existing contact method can be continued, and make the contact method variation of oneself.

3) the utility model is shared input, has simplified circuit structure, has saved equipment cost.

4) in practical application of the present utility model, default mode that can telephone terminal is set to IP phone, behind each end of conversation, also automatically pattern is reverted to the IP phone pattern, so, user's habituation picks up the telephone when dialing, and all can make a call by the natural IP network that passes through, and can save cost of the phone call greatly like this.

5) the utility model can provide the network interface of a plurality of RJ45, makes user's use more convenient, more flexible.Such as: usually, has only a network interface in certain user's office area or the family, and network interface is usually taken by PC, if want to increase an IP phone, increase and lay a netting twine, put a HUB on the table, but these two kinds of methods are all very inconvenient, and the utility model externally can provide two or more RJ45 Ethernet interfaces, can be with an outside line network interface that is used for connecing office area, another is used for connecing PC, so, telephone terminal and PC are shared an outside line network interface, and need not to change existing network configuration.

6) the more important thing is, the utility model partly increases in IP phone and is provided with pluggable SIM card, the network parameter that IP phone is required is provided with and all is stored in the SIM card, so, any dual-mode telephone terminal of the present utility model only need be inserted the SIM card that configures and get final product operate as normal, communicate, and the configuration of the network parameter in the SIM card can be finished by operator, just as the SIM card of mobile phone use.

Description of drawings

Fig. 1 is the composition structural representation of IP phone terminal in the prior art;

Fig. 2 is the composition structural representation of the utility model dual-mode telephone terminal;

Fig. 3 is the annexation figure of the utility model IP phone part main processing block and coding/decoding module one embodiment;

Fig. 4 is the circuit diagram of the utility model dialing control circuit;

Fig. 5 is the circuit diagram of the utility model bell flowing detecting circuit;

Fig. 6 is the circuit diagram of the utility model off-hook detection circuit;

Fig. 7 is the circuit diagram of the utility model USE lamp control circuit;

Fig. 8 is the circuit diagram of the utility model receiver commutation circuit.

Embodiment

Core concept of the present utility model is: the function of traditional PSTN phone and IP phone is realized being integrated in the telephone terminal, this telephone terminal can provide a pstn telephone interface and a plurality of network interface simultaneously, makes the user utilize a telephone terminal to dial pstn telephone or IP phone according to the needs of oneself.

As shown in Figure 2, dual-mode telephone terminal of the present utility model comprises black phone part, IP phone part and common process part, wherein, black phone partly comprises the core function circuitry of finishing black phone, mainly contains: polar protective circuit, dial-up circuit, ringing circuit, speaking circuit, hook switch circuit and RJ11 telephony interface; IP phone partly comprises the corn module of finishing IP phone function and the whole telephone terminal of control, mainly contain: main processing block, coding/decoding module (CODEC), memory modules and an above RJ45 network interface, in addition, the IP phone part also comprises the LCD that links to each other with main processing block; Common process partly comprises input-output unit, as keyboard, receiver, microphone, loud speaker or the like, also comprise the detection control unit, as the control of USE lamp, dialing control, ring detection, off-hook detection etc., other also comprises basic power circuit, reset circuit and clock circuit or the like.

Here, the main processing block that is positioned at the IP phone part is the core control treatment module of whole dual-mode telephone terminal, and this main processing block further comprises CPU (CPU), digital signal processor (DSP) and crosspoint (Switch) three parts.Adopting STLC1502 with main processing block is example, CPU is mainly used in the processing of switching between control to whole telephone terminal, two telephony modes and various data, agreement, this CPU is for adopting the ARM7 of industrial standard, has sdram interface, 32 bit address data/address buss, have UART, I2C, SPI, GPIO, wherein SPI can be used for controlling the equipment of coding/decoding module and other support spi bus.DSP is a D950 digital signal processor, mainly comprise the computing of voice, image coding and decoding, the execution of DSP is subjected to the control of ARM7, and G.711 this DSP supports, 723.1A, G729AB, and ARM7 is by double-port RAM (DPRAM) and D950 transmitting control message and speech data.Crosspoint is the switch of one three port, and two MII interfaces of Switch can directly connect two 10/100M self adaptation PHY, and two RJ45 network interfaces externally are provided.

IP phone partial C ODEC is used for the voice signal that inputs or outputs is encoded or decoded, CODEC is connected with main processing block by the spi bus interface, CODEC and main processing block are by the pulse code modulation (pcm) interactive interfacing data of four lines, and CODEC can adopt the STw5093 chip.Adopt STw5093 with CODEC, it is example that main processing block adopts STLC1502, signal annexation between CODEC and the main processing block as shown in Figure 3, corresponding one by one the linking to each other of GPI012 of the SCK of the CI of the DX of the FS of the MCLK of STw5093 and the PDC of STLC1502, STw5093 and the DR of PFS, the STw5093 of STLC1502 and PDR, the STw5093 of STLC1502 and the CO of PDX, the STw5093 of STLC1502 and SMI, the STw5093 of STLC1502 and the CCLK of SMO, the STw5093 of STLC1502 and STLC1502 and the CS of STw5093 and STLC1502.

The memory modules of IP phone part comprises FLASH and SDRAM two parts, this memory modules directly links to each other with main processing block, FLASH inside is used for the start-up code of deposit operation system, image file and system's relevant configured parameter of application program, FLASH can adopt the 29LV160D chip, and SDRAM can adopt the HY57V653220 chip.

The user uses for convenience, save the operation that the user is configured network of relation parameter in the IP phone, IP phone part can also increase pluggable SIM card module is set, the SIM card module directly links to each other with main processing block by general purpose I/O (GPIO) pin, stores all required configuration informations of IP phone operate as normal in the SIM card module.The SIM card module can directly adopt existing SIM card; Or encrypted card; Or can plug and read-write memory.When the SIM card module was inserted in the IP phone, the main processing block of IP phone part partly carried out initialization according to the configuration information in the SIM card module to IP phone, and IP phone just can proper communication afterwards.

Annexation in the utility model between the operation principle of the composition structure of black phone part, the annexation between each circuit, each circuit and each circuit and each unit of common process part, identical with existing pstn telephone, such as: speaking circuit, hook switch circuit, polar protective circuit and the pstn telephone interface of black phone part are connected successively, and ringing circuit links to each other with the hook switch circuit; Keyboard links to each other with the dial-up circuit of black phone part; Receiver links to each other with the speaking circuit of black phone part respectively via relay; The control of USE lamp links to each other with the speaking circuit of black phone part; Dialing control links to each other with the dial-up circuit of black phone part; The ring detection links to each other with the ringing circuit of black phone part; Off-hook detection links to each other or the like with the hook switch circuit of black phone part, does not repeat them here.

Each part links to each other by the GPIO pin in main processing block and the common process part, main processing block and common process partly in annexation between each part be such: GPIO[0:3] be used to be connected the row (ROW) [1:4] of keyboard; GPIO[5:11] be used to connect the row COL[1:7 of keyboard]; GPIO4 links to each other with dialing control signal DIAL_CTRL; GPIO12 links to each other with the chip selection signal CODEC_CS CODEC of coding module; GPIO13 is used to connect receiver transfer relay control signal RELAY_EAR; GPIO14 is connected with the shared USE lamp control signal LED_CONTROL's of simulation; GPIO15 connects ringing-current detection signal input RING_DET; GPIO[16:17] link to each other with the SIM card module, such as the SIM_RSTN, the SIM_IO signal that connect SIM card; GPIO18 connects off-hook detection signal input HOOK_DET; GPIO19 connects house dog enable/disable signal WD_EN; GPIO4 (OUT) state usually is a low level, in the time will forbidding BL1101, and the output high level; During GPIO12 (OUT) low level, the input and output of CODEC control signal are effective; GPIO13 (OUT) exports high level in the time will switching to the IP phone side to receiver; GPIO14 (OUT) exports high level usually, when detecting off-hook, and output low level; GPIO15 (IN) state usually is to draw high, and when the black phone incoming call, the high-low level square wave occurs; GPIO18 (IN) state usually is to be high level, when the phone off-hook, low level occurs; GPIO19 (OUT) is the high disable house dog, and low level enables house dog.

In the utility model, keyboard can adopt 4 row, 7 row, and wherein preceding 4 row, 4 row are shared by black phone and IP phone, are mainly used in dialing; Back 3 row also can be provided with a PSTN mode selecting key separately by the IP phone special use on the keyboard.Keyboard circuit cooperatively interacts with the dialing control circuit and realizes sharing of keyboard, the dialing control circuit as shown in Figure 4, during the IP phone dialing, GPIO4 exports high level, and the DIAL_CTRL control signal is a high level, triode V10 conducting, the collector electrode of V10 (the C utmost point) is a low level, the C that makes triode V32 is high level very, and the HSKN signal of dialing chip is a high level, and expression dialing chip is in disabled status.Like this, during IP phone dialing, dial message just can not send, and that is to say the pstn telephone exhalation of can not dialling.Equally, during the traditional PSTN dialing, the GPIO4 output low level, make the dialing chip be in dialing status, so, the ranks of STLC1502 all are set to input, then CPU stops keyboard scan, the faint drop-down dialing that can not influence black phone on the ranks line, at this moment, IP phone can not be breathed out.

Do not having under the situation of power supplied locally, only meeting RJ11 and can normally use black phone; When only connecing power supplied locally, keyboard is capable of output, and row are as input, and the CPU of main processing block can just use the output high level always and come keyboard scan, and IP phone can normally be used; RJ11 and power supplied locally connect simultaneously, DIAL_CTRL output high disable dialing chip, keyboard is capable of output, and row are as input, and the CPU of main processing block can just use the output high level always and come keyboard scan, IP phone can normally be used, in this case, if use black phone, then the DIAL_CTRL output low level is enabled the dialing chip, row and column with IP phone is changed to input simultaneously, and black phone also can normally use.

For the keyboard input under the current pattern of living in of dual-mode telephone terminal is not influenced another mode producing, can between main processing block, isolated location be set increase between the dial-up circuit of keyboard and black phone part, in keyboard and IP phone part, this isolated location is controlled its break-make by main processing block, can adopt electronic switch, it as model 4066 electronic switch, also can adopt relay or for buffer such as 74LVC244A or be diode, in a word, can as long as can play the device of switch, buffer action.

Bell flowing detecting circuit when not having bell signal, is high level on the RING_DET line as shown in Figure 5; When the phone incoming call, the square wave of 25Hz appears in RING_DET.In fact, it is special in pstn telephone that ringing-current detects, therefore, if there is ringing-current just to represent to have the pstn telephone incoming call.Optocoupler C93 among Fig. 5 and a last diode 1N4004 are in order to prevent that optocoupler is subjected to back-pressure.

The off-hook detection circuit as shown in Figure 6,3,5 pin closures during hook state are low level on the HOOK_DET line; 1,5 closures high level occurs on the HOOK_DET line during off hook state, the CPU of notice main processing block, and telephone terminal is in off hook state.

The USE lamp control circuit as shown in Figure 7, the pstn telephone in the utility model telephone terminal is by phone-line-powered, and IP phone is powered by local power supply.If when only inserting PSTN, in case the phone off-hook, high level appears in the VCC pin of BL1062A1, occurs high level on the USER_LED, the USE lamp is lighted; If do not insert PSTN, when having only power supplied locally, in case detect off hook signal, the last output low level of LED_CONTROL, high level appears in triode V7 conducting on the USER_LED, light the USE lamp.When if the two is powered simultaneously, high level appears on the USER_LED, light the USE lamp.Diode D17 among Fig. 7 is used to prevent that numerical portion from giving simulation power supply; Current-limiting resistance R181, electric current is excessive when being used to prevent power simultaneously.

Fig. 8 is the commutation circuit of receiver, and as shown in Figure 8, black phone is connected on the normally closed port of relay, like this, is not having under the situation of power supplied locally, and receiver is connected on the black phone side.Having under the situation of power supplied locally, after IP phone guided successfully, RELAY_EAR exported high level, and relay is switched to the IP phone side, and only after the user pressed the PSTN mode selecting key, main processing block can be controlled receiver is switched passback system phone side.

Because dual-mode telephone terminal of the present utility model provides RJ11 interface and an above RJ45 network interface of pstn telephone, and, pstn telephone is by the power taking from the telephone wire of RJ11 interface, and IP phone is powered by local power supply, therefore, there are three kinds of operating states in dual-mode telephone terminal of the present utility model: 1. when only connecting RJ11, this telephone terminal is a traditional PSTN phone; 2. when only connecting power supplied locally, this telephone terminal is an IP phone; 3. when connecting RJ11 and power supplied locally simultaneously, this telephone terminal both can be used as pstn telephone, also can be used as IP phone, and the default mode behind the off-hook is an IP phone usually, can switch under the PSTN pattern by the PSTN selection key.Under the third state, switching between black phone pattern and the IP phone pattern is totally controlled by main processing block, if current selection is the IP phone pattern, then all component of common process part is all switched to IP phone and partly link to each other, cut off and black phone being connected between partly; If current selection is the pstn telephone pattern, then all component of common process part is all switched to pstn telephone and partly link to each other, cut off and IP phone being connected between partly.

Description based on above-mentioned composition structure and every partial function principle, for the third operating state of dual-mode telephone terminal, further specify the operation principle of the utility model dual-mode telephone terminal below more respectively from the angle of the angle of calling terminal and terminal called.

When dual-mode telephone terminal of the present utility model during, two kinds of situations are arranged: a) use IP phone to breathe out as calling terminal; B) use pstn telephone to breathe out.

Because the default mode of dual-mode telephone terminal of the present utility model is an IP phone, so, in the moment of user's off-hook, common process part in the dual-mode telephone terminal all is connected to IP phone part main processing block, comprising keyboard, receiver, the control of USE lamp, dialing control and off-hook detection.At this moment, described keyboard, receiver disconnected with being connected all of black phone part, can finish each assembly of common process part and black phone being connected or disconnection partly by switch is set; Dialing control makes the dialing chip in the black phone be in disabled status; High level occurs on the USE lamp control USER_LED, light the USE lamp; It is unwanted detecting as the caller ring, and the ring detection disconnects or is connected with main processing block does not influence calling.Mode selecting key is effective if main processing block does not detect PSTN, then continues to finish the calling procedure of IP phone, and the flow process that concrete call flow and existing IP phone terminal are called out is basic identical.If it is effective that main processing block detects the PSTN mode selecting key behind the off-hook, illustrate that the user will select pstn telephone to call out, then main processing block partly switches to the black phone side with common process, that is: keyboard, receiver, the control of USE lamp, dialing control and off-hook detection are linked to each other with speaking circuit, dial-up circuit, ringing circuit, the hook switch circuit of black phone part respectively, same ring detects and does not need; Dialing control output low level is enabled the dialing chip; Afterwards, main processing block control telephone terminal continues to finish the pstn telephone calling procedure, and concrete call flow is identical with the flow process that existing pstn telephone terminal is called out.

When dual-mode telephone terminal of the present utility model during, three kinds of situations are arranged: a) IP phone incoming call as terminal called; B) pstn telephone incoming call; C) IP phone and pstn telephone incoming call simultaneously.When off-hook not, keyboard, receiver, the control of USE lamp, dialing control all link to each other with main processing block with off-hook detection, partly disconnect with black phone, and the ring detection is connected with main processing block simultaneously with ringing circuit.

When the ring test section detects ring, the pstn telephone incoming call has been described, ring detects and just notifies main processing block with bell signal, if this moment, main processing block did not detect the IP ring packet of coming from the RJ45 interface, then main processing block all switches to keyboard, receiver, the control of USE lamp, dialing control and off-hook detection with speaking circuit, dial-up circuit, ringing circuit, the hook switch circuit of black phone part and links to each other, continue to finish off-hook, the communication process of pstn telephone, be changed to the IP phone partial status busy simultaneously.

When main processing block detects the IP ring packet of coming from the RJ45 interface, the IP phone incoming call has been described, if this moment, main processing block did not detect bell signal, then main processing block continues to finish the replying of IP phone, call flow.

When the ring test section detects ring, and when notifying main processing block with bell signal, main processing block detects the IP ring packet of coming from the RJ45 interface again; Or, after main processing block detects the IP ring packet of coming from the RJ45 interface, receive that again ring detects the bell signal notice of sending here, in such cases, because as long as user's off-hook is certain to pstn telephone is inserted, so, main processing block all switched to keyboard, receiver, the control of USE lamp, dialing control and off-hook detection with speaking circuit, dial-up circuit, ringing circuit, the hook switch circuit of black phone part and linked to each other this moment, continue to finish off-hook, the communication process of pstn telephone, and be changed to the IP phone partial status busy simultaneously.

The above is preferred embodiment of the present utility model only, is not to be used to limit protection range of the present utility model.

Claims

1, a kind of dual-mode telephone terminal is characterized in that, this telephone terminal comprises the black phone part that realizes the pstn telephone function, IP phone part and the common process part that realizes the IP phone function, wherein,

2, dual-mode telephone terminal according to claim 1, it is characterized in that, described IP phone part further comprises the plugged SIM card module that is used for storing IP phone relevant configuration information, and described sim module links to each other by the main processing block of general input and output pin with the IP phone part.

3, dual-mode telephone terminal according to claim 2 is characterized in that, the described SIM card module that plugs is pluggable common SIM card, or is pluggable encrypted card, or for can plug read-write memory.

4, according to claim 1,2 or 3 described dual-mode telephone terminals, it is characterized in that, the input-output unit of described common process part comprises: keyboard or receiver or microphone or loud speaker or four combination, wherein, keyboard links to each other with the dial-up circuit of black phone part and the main processing block of IP phone part respectively; Receiver links to each other with the speaking circuit of black phone part and the main processing block of IP phone part respectively via relay, and microphone, loud speaker all link to each other with the coding/decoding module of IP phone part.

According to claim 1,2 or 3 described dual-mode telephone terminals, it is characterized in that 5, the detection control unit of described common process part comprises at least: the control of USE lamp, dialing control, ring detection, off-hook detection; Described USE lamp control links to each other with the speaking circuit of black phone part, described dialing control links to each other with the dial-up circuit of black phone part, described ring detection links to each other with the ringing circuit of black phone part, and described off-hook detection links to each other with the hook switch circuit of black phone part; And the control of USE lamp, dialing control, ring detection, off-hook detection all link to each other by the main processing block of general input and output pin with the IP phone part.

6, dual-mode telephone terminal according to claim 4 is characterized in that, is provided with isolated location between the dial-up circuit of described keyboard and black phone part.

7, dual-mode telephone terminal according to claim 6 is characterized in that, described isolated location is an electronic switch or for relay or for buffer or for diode.

8, dual-mode telephone terminal according to claim 4 is characterized in that, is provided with isolated location between the main processing block of described keyboard and IP phone part.

9, dual-mode telephone terminal according to claim 8 is characterized in that, described isolated location is an electronic switch or for relay or for buffer or for diode.

10, dual-mode telephone terminal according to claim 1 is characterized in that, described IP phone part further comprises LCDs, and described LCDs links to each other with the main processing block of IP phone part.