CN1774081B

CN1774081B - Method for inter-calling connection among multi-external line special communication terminal

Info

Publication number: CN1774081B
Application number: CN 200510021992
Authority: CN
Inventors: 耿直
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-11-03
Filing date: 2005-11-03
Publication date: 2010-04-28
Anticipated expiration: 2025-11-03
Also published as: CN1774081A

Abstract

`A method for connecting call between multiple terminals of outside-line special communication includes using special communication terminal to automatically check dialing number of its belonging user switch-board, automatically dividing it to its belonging dispatch area and enabling to conveniently seek called object when calling is operated.

Description

Call out the method that connects between a plurality of external line special communication terminals mutually

Technical field

The present invention relates to a kind ofly, communicate to connect with formation by only having that point-to-point communication connects and the PSTN of nonpreemption processing capacity is linked between a plurality of communication terminal specials of subscriber exchange and calls out the method that connects mutually.

Background technology

Using in the Public Switched Telephony Network described in actual conditions and the present invention at present, insert and switching network as public telephone switching network, GSM and CDMA public wireless phone, its communication mode all is point-to-point communication mode, the priority of communication terminal all is a same levels, and switching network and communication terminal do not have priority setting and disposal ability; The major function that employed subscriber exchange is realized in such Public Switched Telephony Network is:

1, the outside line user inserts the interior lines extension set that certain is set in advance automatically by Public Switched Telephony Network incoming call subscriber exchange.

2, the outside line user who inserts this subscriber exchange inserts certain the interior lines extension set that requires by human relay working or two-stage dialing.

3, the interior lines extension set dialing of access subscriber exchange enters Public Switched Telephony Network, and dialing is called out other outside lines of connection user by Public Switched Telephony Network.

4, under human relay working, the interior lines extension set that outside line is inserted user and access subscriber exchange constitutes the conference communication mode.

5, the mutual calling between each interior lines extension set of access subscriber exchange connects and formation conference communication mode under human relay working.

In above-mentioned communication network and equipment, in the connection of the calling between the outside line user of Public Switched Telephony Network access, switching network and terminal equipment do not have priority setting and processing capacity, when Called Subscriber is occupied, call out once more after can only waiting for its free time and could insert, can not carry out group calling between the outside line user, just can finish point-to-point individual calling inserts, in addition, time of call established between the outside line user is longer, be generally 3-7 second, can not satisfy the instructions for use of quick access at ask for something turn-on time less than 2 seconds occasion; Be linked into the outside line user of subscriber exchange by the Public Switched Telephony Network system, when using two-stage dialing to call out other users, the object of calling out can only be the interior lines user on the extension line that is connected this subscriber exchange, use the mode of two-stage dialing calling can not realize calling out automatically other other outside lines users of connection, can not realize between the outside line user that quick exchange inserts, priority is judged dispatching communication functions such as access and group calling by the access of Public Switched Telephony Network system.

Though in the prior art, GSM-R wireless communication system and wireless trunking communication system can be realized dispatching communication functions such as quick access, processed and group calling, but corresponding telephone for special use exchanging network system need be set, see economical and practical inadequately from the Technological Economy angle.

Disclose the document of present subscriber exchange technology, ZL01139460.9 is arranged, the document has been introduced " communication means of user switchboard system, subscriber exchange and user switchboard system ".Wherein, this invention has been introduced outside line and has been inserted the technical method that the user carries out group calling to the interior lines telephone subscriber, that is: " calling of incoming call is connected on many predetermined interior lines." but should invent the mutual short calling connectivity problem that solves between a plurality of outside line users of docking the access customer switch, do not have priority setting and processing to the calling connection of other outside line user terminals yet, can not carry out group calling to the outside line user.

Because it is very universal to have the Public Switched Telephony Network of point communications functionality, its use cost is cheap, in order to make full use of its advantage, be necessary on existing basis, to realize connecting fast, dispatching communication functions such as processed and group calling connection are arranged, and make communication terminal easy for operation as far as possible, need have communication terminal search automatically under the dialed number of subscriber exchange, automatically be divided the dispatcher-controlled territory under being included into and when call operation, can search the function of being exhaled object easily, to satisfy instructions for use widely, the range of application of expansion Public Switched Telephony Network.

Summary of the invention

The objective of the invention is to, provide a kind of can be by only having that point-to-point communication connects and the Public Switched Telephony Network of nonpreemption processing capacity be linked between a plurality of external line special communication terminals of subscriber exchange and calls out the method that connects mutually, make it have quick connection, the advantage that specific schedule communication functions such as processed and group calling connection are arranged, simultaneously, also, realize that its communication terminal special searches the dialed number of affiliated subscriber exchange automatically according to the special requirement of dispatching communication and the convenience of using, automatically divide the dispatcher-controlled territory under being included into and when call operation, can search affirmation easily by call object.

For achieving the above object, the present invention has introduced a kind of by only having that point-to-point communication connects and the Public Switched Telephony Network of nonpreemption processing capacity is linked between a plurality of external line special communication terminals of subscriber exchange and calls out the method that connects mutually, described external line special communication terminal inserts described subscriber exchange by described Public Switched Telephony Network after through the Sending dialled number number, it is characterized in that, described external line special communication terminal has private identity information code separately, includes in this private identity information code and represents the quilt of this external line special communication terminal to exhale short code, the priority level sign indicating number, position code, function code, block code, conditional code; Described external line special communication terminal is by the definite dialed number to described subscriber exchange of the private identity information code of itself; Described external line special communication terminal sends the private identity information code of described external line special communication terminal to described subscriber exchange; Described subscriber exchange receives and stores private identity information code and the corresponding switching conditional code thereof that described external line special communication terminal sends; Described subscriber exchange docks the private identity information code of receiving and keeping storage to carry out validity decision and divides the dispatcher-controlled territory sign indicating number that the affiliated dispatcher-controlled territory of the private identity information code of storing reaches the private identity information code of determining storage, and the communicating to connect of described external line special communication terminal that does not belong to described subscriber exchange service range hung up; The private identity information code of the described external line special communication terminal that described subscriber exchange will be stored sends to and inserts described subscriber exchange and be divided in other described external line special communication terminal of same dispatcher-controlled territory with the private identity information code of storage; Described external line special communication terminal receives and other the private identity information code of described external line special communication terminal of coming is transmitted in storage by described subscriber exchange; Described external line special communication terminal is judged to other the private identity information code of described external line special communication terminal that receives that the back is arranged and is generated the call object table; Described external line special communication terminal sends private calls connection sign indicating number according to call object table and call operation, and the private calls that described external line special communication terminal sends connects the quilt that contains type of call sign indicating number, call class sign indicating number and called external line special communication terminal in the sign indicating number and exhales short code; The master that the private calls that described subscriber exchange sends according to described external line special communication terminal connects sign indicating number and storage exhales and carries out class of call and priority level with the private identity information code of the described external line special communication terminal of being exhaled and switching conditional code thereof and compare to determine the back and carry out the exchange connection of the described external line special communication terminal that this transmissions private calls is connected yard or give etc. pending.Call out the method that connects between a plurality of external line special communication terminal of the present invention mutually, be linked in a plurality of external line special communication terminals of subscriber exchange by the Public Switched Telephony Network that only has point-to-point communication connection and nonpreemption processing capacity, described external line special communication terminal is determined the dialed number of the affiliated subscriber exchange of the correspondence that connect according to the private identity information code of this machine setting, described external line special communication terminal inserts described subscriber exchange by Public Switched Telephony Network after sending dialed number, the present invention is by the mutual transmission of described subscriber exchange with the private identity information code of described external line special communication terminal transmission, stores processor reaches the priority level that the private calls of described external line special communication terminal is connected sign indicating number and private identity information code, after judging, class of call and present located connection swap status exchanged connection processing, realization is arrived by the public switching systems network insertion that only has point-to-point communication connection and nonpreemption processing capacity and is called out purpose of connecting between a plurality of external line special communication terminals of subscriber exchange mutually, and has quick connection, the characteristics of specific schedule communication functions such as processed and group calling connection are arranged, and realized that also communication terminal special searches the dialed number of affiliated subscriber exchange automatically, automatically be divided the dispatcher-controlled territory under being included into and when call operation, can search the function of being exhaled object easily.

The content of the present invention and the course of work are: only have that point-to-point communication connects and the external line special communication terminal of the Public Switched Telephony Network of nonpreemption processing capacity is provided with separately private identity information code to inserting, on behalf of the quilt of this external line special communication terminal, include in this private identity information code exhale short code, the priority level sign indicating number, position code, function code, block code, conditional code, when this quilt exhales short code to be used for described external line special communication terminal to call out mutually to searching by call object, the priority level sign indicating number is used to characterize the connection priority to described external line special communication terminal, calling with described external line special communication terminal of high-grade priority level sign indicating number connects and is better than the low external line special communication terminal of priority level, position code is used to characterize the residing geographical position of this external line special communication terminal, is used for the dialed number of subscriber exchange under external line special communication terminal is searched, call object table that generates and subscriber exchange are divided the foundation of dispatcher-controlled territory to external line special communication terminal; Function code is used to characterize the responsibilities that this external line special communication terminal is born, and its responsibilities classification has subdispatch, fixed station, travelling carriage etc., and block code is used to characterize the residing user's group # of this external line special communication terminal; Conditional code is used to characterize the operating state of this external line special communication terminal, promptly fixingly still moves, traffic direction and power supply supply situation etc.; Described external line special communication terminal is determined the number of the subscriber exchange of needs dial-up connection according to the content of own private identity information code by inquiring about this external line special communication terminal database, after sending this dialed number, insert described subscriber exchange by described Public Switched Telephony Network, this access is through the access after the dialing, its communication port is in opening state, the condition that has possessed described external line special communication terminal and the mutual exchange message of described subscriber exchange, described external line special communication terminal send the private identity information code of this described external line special communication terminal to described subscriber exchange; Described subscriber exchange receives and stores the private identity information code that described external line special communication terminal sends, and the legitimacy of this private identity information code judged, connection to the external line special communication terminal of illegal private identity information code representative is interrupted, insert with the connection of avoiding illegal outside line user, legal private identity information code is carried out affiliated dispatcher-controlled territory judge, determine its corresponding dispatcher-controlled territory sign indicating number; The private identity information code of the described external line special communication terminal that described subscriber exchange will be stored sends to described external line special communication terminal other all accesses and in same dispatcher-controlled territory; All described external line special communication terminals receive and storage is transmitted other the private identity information code of described external line special communication terminal of coming by described subscriber exchange, and are that dispatcher-controlled territory sign indicating number in the private identity information code of external line special communication terminal of subdispatch is as the dispatcher-controlled territory sign indicating number in the private identity information code of this external line special communication terminal with the function code of receiving; The private identity information code of the described external line special communication terminal of other that described external line special communication terminal basis receives is analyzed to arrange and is generated the call object table, promptly according to the private identity information code that receives, according to its position, function, traffic direction etc., arrange out the customer call table that can communicate, so that search when calling out definite, described external line special communication terminal is in needs, type of call and class of call are set, according to call object table selective call object, send private calls again and connect sign indicating number, the private calls that described external line special communication terminal sends connects and contains (the expression ordinary call of call class sign indicating number in the sign indicating number, work is called out and urgent call), the type of call sign indicating number (expression individual calling and group calling) and the quilt of called external line special communication terminal are exhaled short code, and which external line special communication terminal is exhaled short code is in order to what determine to call out; After described subscriber exchange receives that private calls that described external line special communication terminal sends connects sign indicating number, the quilt that the private calls that described subscriber exchange sends according to described external line special communication terminal connects in the sign indicating number exhales short code to inquire about called external line special communication terminal, and exhales with the private identity information code of the external line special communication terminal of being exhaled and the external line special communication terminal of being exhaled according to the master of storage and to analyze judgement in this subscriber exchange present located exchange connection status (conditional code of promptly transferring); Be lower than telephone number figure place in the Public Switched Telephony Network because private calls connects the figure place of being exhaled short code in the sign indicating number, so the determination processing time of subscriber exchange is shorter; If called external line special communication terminal is in the free time, then can be exchanged access immediately, if called external line special communication terminal is in seizure condition (promptly exchanging connection status), then connect priority and the residing class of call of external line special communication terminal of being exhaled in the private identity information code of class of call in the sign indicating number and main external line special communication terminal of exhaling and compare judgement with the height situation of priority level sign indicating number in the private identity information code of the external line special communication terminal of its existing exchange annexation according to the private calls received, to the user of high-level priority and other calling of high call level is inserted or keep its original exchange to connect, and low-level priority level user and low-level calling will not exchange to connect or interrupt its original exchange and connect, and the external line special communication terminal that does not insert or interrupted connecting are given etc. pending; The type of call sign indicating number that private calls is connected in the sign indicating number is the external line special communication terminal of group calling, also after having judged User Priority and class of call, pass through the meeting exchange linkage function of subscriber exchange, waited for or exchange to be linked into accordingly and exhaled external line special communication terminal; So just realized and have quick connection, private communication functions such as processed and group calling connection are arranged, also realized communication terminal special search automatically under subscriber exchange dialed number, be divided the dispatcher-controlled territory under being included into and when operation is called out, can search the function of being exhaled object easily automatically.

Description of drawings

Fig. 1-1, Fig. 1-2 are the grid figure of one embodiment of the invention.

Fig. 2 is that the train dispatching section of one embodiment of the invention is divided schematic diagram.

Fig. 3 is the outward appearance block diagram of the external line special communication terminal of one embodiment of the invention.

Fig. 4 is the electric theory diagram of the external line special communication terminal of one embodiment of the invention.

Fig. 5 is the electric theory diagram of the subscriber exchange of one embodiment of the invention.

Fig. 6 is the pie graph of private identity information code of the external line special communication terminal of one embodiment of the invention.

Fig. 7-1, Fig. 7-the 2nd, the pie graph of the call object table of the external line special communication terminal of one embodiment of the invention.

Fig. 8 is that the private calls of one embodiment of the invention connects the sign indicating number pie graph.

Fig. 9-1 and Fig. 9 the-the 2nd, the structure chart of the private identity information code that the subscriber exchange of one embodiment of the invention receives, the external line special communication terminal of storage sends and the switching conditional code of external line special communication terminal.

Figure 10 is the flow chart that the external line special communication terminal of one embodiment of the invention sends the private identity information code.

Figure 11 is that the subscriber exchange of one embodiment of the invention receives, stores and send the private identity information code of external line special communication terminal and stores the flow chart of the switching conditional code of external line special communication terminal.

Figure 12-1 and Figure 12 the-the 2nd, the external line special communication terminal of one embodiment of the invention receive other external line special communication terminal the private identity information code and generate the flow chart of call object table.

Figure 13 is that the external line special communication terminal of one embodiment of the invention sends the flow chart that private calls connects sign indicating number.

Figure 14 is the flow chart of the private calls connection sign indicating number that the subscriber exchange of one embodiment of the invention receives and the processing external line special communication terminal sends.

Embodiment

Below be the example explanation embodiment of the invention with the accompanying drawing.

Fig. 1-1, Fig. 1-2 express an example and use grid figure formation of the present invention and overall summary thereof, wherein:

Among Fig. 1-1:

101～103 are fixing external line special communication terminal, and it adopts subscribers feeder to insert wired Public Switched Telephony Network 301; 201,202 for GSM moves external line special communication terminal, and it inserts the gsm wireless phone by wireless channel and inserts and switching network 302; Wired Public Switched Telephony Network 301 inserts with the gsm wireless phone and switching network 302 uses the interoffice junction circuit to be connected, 401-40n is a subscriber exchange, and all has the function that meeting exchanges and many outside lines user inserts simultaneously and adopt subscribers feeder to be connected with wired Public Switched Telephony Network 301; Because using the interoffice junction circuits to be connected with access of gsm wireless phone and switching network 302, wired Public Switched Telephony Network 301 is the present widely used state of the art, its user terminal that inserts separately can be called out connection mutually, therefore wired Public Switched Telephony Network 301 and the access of gsm wireless phone and switching network 302 these two parts can be commonly referred to as Public Switched Telephony Network 001; For all external line special communication terminals, no matter be fixedly or mobile, can regard the user who is linked into Public Switched Telephony Network 001 as, therefore can be commonly referred to as external line special communication terminal; External line special communication terminal sends the exchange by Public Switched Telephony Network 001 behind the dialed number of subscriber exchange is inserted, and is connected open-mindedly with subscriber exchange (one of 401～40n) communication port, possesses and communicates by letter and the condition of transfer of data.

Fig. 1-2 is that the service range of subscriber exchange in the grid is divided, wherein:

1. distinguish by subscriber exchange 401 administration and for external line special communication terminals such as 101,201 in distinguishing service is provided;

2. distinguish by subscriber exchange 402 administration and for external line special communication terminals such as 102,202 in distinguishing service is provided;

3. distinguish by subscriber exchange 403 administration and for external line special communication terminals such as 103,203 in distinguishing service is provided;

4. distinguish by subscriber exchange 404 administration and for external line special communication terminals such as 104,204 in distinguishing service is provided;

Subscriber exchange 401,402,403 and 404 has the different separately numbers of dialling in Public Switched Telephony Network, and all has meeting exchange and many outside lines user while access function.

Fig. 2 expresses an example and uses train dispatching section division figure of the present invention, is the dispatcher-controlled territory scope division of the subscriber exchange 401 described in Fig. 1 and Fig. 2 shown in the figure, wherein:

The compass of competency of subscriber exchange 401 is 400 kilometers road segment segment of east-west direction, be divided into 4 dispatcher-controlled territories, each dispatcher-controlled territory administration 100Km highway section, its dispatcher-controlled territory sign indicating number (binary coding) is respectively 00 (representing the 0-100Km section), 01 (representing the 100-200Km section), 10 (representing the 200-300Km section), 11 (representing the 300-400Km section); External line special communication terminal in different dispatcher-controlled territories is given different dispatcher-controlled territory sign indicating numbers, external line special communication terminal in identical dispatcher-controlled territory is given identical dispatcher-controlled territory sign indicating number, and the dispatcher-controlled territory in the administrative area of other subscriber exchanges is divided similarly.

Below, present embodiment is that example is narrated an implementation process of the present invention and method with the compass of competency of subscriber exchange 401.

Fig. 3 expresses the outward appearance block diagram that an example is used external line special communication terminal of the present invention, wherein:

Button 1001 is a login button, and when pressing 1001 login button, external line special communication terminal sends calling dial coding to the subscriber exchange (401 among Fig. 1 and Fig. 2) of administering to Public Switched Telephony Network under it, insert described subscriber exchange; Button 1.～10., * and # be general dialing button, and is identical with the ordinary telephone set button, is used for dialing, the user is provided with and the data input; Button 1002 is the class of call options button, presses this key and can select ordinary call or urgent call; Button 1003 is the type of call options button, presses this key and can select individual calling or group calling; Button 1004,1005 is the call object options button, according to the call object table that shows on the display, press this two key and in the call object table, move up and down the called object of selection, this object is once selected, and the private calls of sending when it makes a call connects and contains this quilt in the sign indicating number and exhale the quilt of external line special communication terminal to exhale short code; Button 1006 is an assignment key, press this key can to the subscriber exchange described in the Fig. 1 that connects by Public Switched Telephony Network send chosen by type of call sign indicating number, class of call sign indicating number and exhaled the private calls of being exhaled short code to constitute of external line special communication terminal to connect sign indicating number; Display M1 is used to show call object table that the private identity information code according to other external line special communication terminals that receive, sent here by described subscriber exchange is generated and the work state information of this external line special communication terminal.

Fig. 4 expresses the electric theory diagram that an example is used external line special communication terminal of the present invention, wherein:

CPU1 is a microprocessor, implements control and detection to each unit of external line special communication terminal; I/O is the networking interface unit; When this external line special communication terminal is portable terminal and inserts that radio telephone such as GSM inserts and during switching network, the I/O unit is made up of radio receiving-transmitting unit; When this external line special communication terminal is a fixed terminal and when inserting public telephone switching network, the I/O unit is connected by the wire user interface and with public telephone switching network; M-Km is a mileometer, and being used for provides positional information to this external line special communication terminal; The R1 unit is a memory, storage operation program and operational order, other the private identity information code of external line special communication terminal of also storing the private identity information code of this external line special communication terminal and receiving; The M2 unit is a display, shows the operating state of this external line special communication terminal, and the private identity information code, type of call, the class of call that contain this external line special communication terminal are set and the call object table; The K unit is a keyboard portion, this keyboard is used to operate the work of this external line special communication terminal, also be used for data modification and setting to this external line special communication terminal, as private identity information code, type of call, the class of call of this external line special communication terminal being set and being selected, to the selection of the call object in the call object table; This external line special communication terminal user is by the operation to keyboard K, under the identification and control of microprocessor CPU 1, by the dialing signal of I/O networking interface unit transmission to affiliated subscriber exchange, this external line special communication terminal is connected with the described subscriber exchange 401 of Fig. 1 by Public Switched Telephony Network, its communication port is switched on, the private identity information code that will be stored in this external line special communication terminal among the memory R1 then automatically sends to the described subscriber exchange 401 of Fig. 1 by the Public Switched Telephony Network that I/O goes into network interface and access, and, the private identity information code of the external line special communication terminal of other that the Public Switched Telephony Network of going into network interface and access by I/O receives that the described subscriber exchange 401 of Fig. 1 sends, CPU1 is according to the setting of operation sequence, with other the private identity information code of external line special communication terminal that receives, press its positional information, function code, deposit call object table data field after the judgement of priority code and conditional code in, and this call object table shown on display M2, be convenient to when carrying out call operation select for the user.

Fig. 5 express an example use subscriber exchange of the present invention electric theory diagram, wherein:

CH1, CH2-CHn are the outside line interface unit, are used for being connected with Public Switched Telephony Network, and are connected with external line special communication terminal by Public Switched Telephony Network; A/D is encoding and decoding-modem module, and the data-signal that is used for sending here by Public Switched Telephony Network receives and demodulating and decoding, also is used for sending to external line special communication terminal with the digital signal encoding modulation and by Public Switched Telephony Network; CPU2 is a microprocessor, is responsible for the work of each unit of control and reaches to detect receiving numeric data code; EXC is a switching matrix, and the exchange that is used for finishing under the control of microprocessor CPU 2 to line interface CH1, CH2-CHn unit outside each connects, and the exchange that promptly achieves a butt joint into each external line special communication terminal of this subscriber exchange connects; R2 is a memory, is used for the storage operation program and the validated user function code section and the position code section of the private identity information code of the operating state data of the private identity information code of the external line special communication terminal that receives, each unit and legal communication terminal special; External line special communication terminal is by sending the dialing coding and connecting this subscriber exchange of access by the Public Switched Telephony Network exchange to Public Switched Telephony Network, external line special communication terminal is just set up with the communication port of this subscriber exchange by the outer line interface (one of CH1～CHn) of this subscriber exchange, when this subscriber exchange receives the private identity information code of this external line special communication terminal that external line special communication terminal sends by outer line interface, receive and convert to 2 system digital codings by A/D encoding and decoding-modem module and send into the CPU2 microprocessor and judge and deposit the R2 memory in; When certain external line special communication terminal initiates other other external line special communication terminals of inserting by public telephone network of having dialled are called out and send here private calls and connect sign indicating number, outer line interface (one of CH1～CHn) receives this private calls and connects sign indicating number, by A/D is that encoding and decoding-modem module receive and convert to 2 system digital codings to send into CPU2 be microprocessor, CPU2 is that microprocessor gives determination processing according to content and the called external line special communication terminal that this private calls connects sign indicating number in the operating state of the exchange connection of this subscriber exchange, and the control switching matrix exchanges connection processing accordingly.

Fig. 6 expresses the formation that an example is used the private identity information code of external line special communication terminal of the present invention, wherein:

Constituting of the private identity information code of external line special communication terminal: exhaled short code, dispatcher-controlled territory sign indicating number, priority level sign indicating number, position code, function code, block code, conditional code; Code signal when this quilt exhales short code to be used for this external line special communication terminal by other external line special communication terminals callings, be that subscriber exchange is according to this code signal, can search and confirm called external line special communication terminal, the consideration permission can insert subscriber exchange simultaneously in a dispatcher-controlled territory external line special communication terminal is 256, then uses 82 ary codes to represent; The dispatcher-controlled territory sign indicating number is used to characterize the affiliated dispatcher-controlled territory of this external line special communication terminal, and present embodiment is 4 to the scheduling area dividing, then adopts 22 ary codes to represent, is provided with to divide by subscriber exchange and distributes; The priority level sign indicating number is used to characterize the priority level when this external line special communication terminal of usefulness main called out and called out, calling with external line special communication terminal of higher precedence power connects and is better than the low-level external line special communication terminal of priority level, if 4 grades are set, then adopt 22 ary codes to represent; Position code is used to characterize the residing geographical position of this external line special communication terminal, the positional information that adopts the M-Km mileometer to provide, be used for the foundation of when the call object table that external line special communication terminal generates, arranging as sequence number, also be used for this external line special communication terminal according to the dialed number that the subscriber exchange under determining is set and under subscriber exchange judge dispatcher-controlled territory under this external line special communication terminal; Present embodiment adopts mileage to be accurate to 10 meters modes and characterizes, and maximum 10 system numbers are 40000 (expression 400Km), then use 16 2 ary codes to be represented; Function code is used to characterize the responsibilities content that this external line special communication terminal is born, specifically be categorized as subdispatch, fixed station and travelling carriage, adopt 10 2 ary codes to represent, can express 1024 responsibilities contents, present embodiment is 4 to the scheduling area dividing, function code to subdispatch is defined as 0000000000-0000000011, and all the other are the function code of fixed station and travelling carriage; Block code is used to characterize the residing user's group # of this external line special communication terminal, to distribute 4 groups fixed, adopts 22 ary codes to represent; Conditional code is used to characterize the operating state of this external line special communication terminal, adopt 32 ary codes to represent, wherein: motion state is mobile or fixing, adopts 12 ary codes to represent, traffic direction, press 2 directions of thing and divide, then use 12 ary codes to represent the power supply supply situation, represent that normally whether it, use 12 ary codes to represent.

Fig. 7-1, Fig. 7-2 express the formation that an example is used the call object table of external line special communication terminal of the present invention, wherein:

The call object table of external line special communication terminal is two storages and expression mode, and one is the call object table data in the memory, as Fig. 7-1, be show Calls Object table on display, as Fig. 7-2; The two is corresponding, but among Fig. 7-2 on the display items displayed content and mode be different from storage data content in the memory; The call object table that shows on the display contains sequence number, call object title, function number, is exhaled short code, and adopts 10 system numeral or textual representation; Contain corresponding to the call object table that shows on the display and the storage data that are stored in the call object table in the memory and to be exhaled short code, dispatcher-controlled territory sign indicating number, priority level sign indicating number, position code, function code, block code, conditional code; Wherein:

Sequence number, the ordering of each external line special communication terminal in the expression call object table, considering to allow to insert subscriber exchange simultaneously and being in the interior external line special communication terminal of same dispatcher-controlled territory is 256, then uses 82 ary codes to represent, sequence number arranges from 1 to 256; The call object title: be fixing literal in the call object table, expression can be exhaled the title of object; Other are exhaled short code, dispatcher-controlled territory sign indicating number, priority level sign indicating number, position code, function code, block code, conditional code identical with the private identity information code of aforesaid external line special communication terminal; The sortord of call object table is for to determine by program shown in Figure 12-1 and Figure 12-2 according to the situation of function code, conditional code and position code.

Fig. 8 expresses an example and uses the formation that private calls of the present invention connects sign indicating number, wherein:

Private calls connection sign indicating number contains is exhaled short code, type of call sign indicating number and class of call sign indicating number; Being exhaled short code is the calling sign indicating number that needs to call out connecting object, adopts 82 ary codes to represent (setting can be held 256 communication terminal specials in the same dispatcher-controlled territory); The type of call representation is called out to group calling or individual calling, adopts 12 ary codes to represent; The class of call representation is called out to ordinary call, work and is called out and urgent call, adopts 22 ary codes to represent; Above-mentionedly amount to 11 2 ary codes; Because of the modulation demodulation system of transfer of data employing in the present embodiment sends and receives, so the transmitting-receiving time is less than adopt the dual-tone multifrequency mode in existing Public Switched Telephony Network.

Fig. 9-1 and Fig. 9-2 expresses that an example uses that subscriber exchange of the present invention receives, the pie graph of the switching conditional code of the external line special communication terminal of the private identity information code of the external line special communication terminal of storage and storage, wherein:

Memory sequence number: for the storage address of the switching conditional code in this subscriber exchange of the storage private identity information code of external line special communication terminal and this external line special communication terminal (adopts 482 ary codes to represent, to be used for 4 dispatcher-controlled territories, each dispatcher-controlled territory allows to insert simultaneously 256 external line special communication terminals); Exhaled short code, dispatcher-controlled territory sign indicating number, priority level sign indicating number, position code, function code, block code, conditional code described the same with preceding Fig. 6; The switching conditional code: the expression subscriber exchange to the access of this external line special communication terminal and with other external line special communication terminal be connected swap status; Wherein contain: the access channel sign indicating number: represent the busy channel numbering when this external line special communication terminal inserts subscriber exchange, adopt 482 ary codes to represent; The memory sequence number that other the private identity information code of external line special communication terminal that is in the exchange connection status with this external line special communication terminal is stored in this subscriber exchange (as previously mentioned, adopt 482 ary codes to represent) and the type of call sign indicating number when call out connecting is (as shown in Figure 8, adopt 12 ary codes to represent) and class of call sign indicating number (as shown in Figure 8, adopting 22 ary codes to represent).

Figure 10 expresses an example and uses the flow chart that external line special communication terminal of the present invention sends the private identity information code, wherein:

Behind this external line special communication terminal starting up, this machine private identity information code is provided with, the wherein artificial content that is provided with has function code, and according to function code the quilt that generates correspondence is set by program and exhales short code, in the present embodiment, to be exhaled short code=function code; By program the priority level sign indicating number that generates correspondence is set according to function code, the rule that is provided with of priority level sign indicating number is: subdispatch is 4 grades of (superlative degrees, 22 ary codes represent 11), fixed station is 3 grades (2 2 ary codes represent 10), to travelling carriage, function number＜100 (10 system numbers) be 2 grades (2 2 ary codes represent 01), function number 〉=100 (10 system numbers) be 1 grade (minimum, 22 ary codes represent 00); Follow procedure is by in this machine private identity information code, subscriber exchange under the position code that the M-Km mileometer provides generates is dialled the number, promptly, judgement according to location information, at the external line special communication terminal of 1. distinguishing, subscriber exchange dialed number under it is the dialed number of subscriber exchange 401, at the external line special communication terminal of 2. distinguishing, subscriber exchange dialed number under it is the dialed number of subscriber exchange 402, at the external line special communication terminal of 3. distinguishing, subscriber exchange dialed number under it is the dialed number of subscriber exchange 403, at the external line special communication terminal of 4. distinguishing, the subscriber exchange dialed number under it is the dialed number of subscriber exchange 404; The dispatcher-controlled territory sign indicating number is pressed up-to-date used dispatcher-controlled territory sign indicating number earlier as the acquiescence sign indicating number; After carrying out register, to the dialed number of the Public Switched Telephony Network transmission that is connected to affiliated subscriber exchange, and connection status monitored affirmation, if connection failure or with the interruption that is connected of subscriber exchange, then hang up to return and confirm that the back continues dialing; After the dial-up connection success to subscriber exchange, send the private identity information code of this external line special communication terminal to subscriber exchange; If this external line special communication terminal is a travelling carriage, then enter the program A1 work of Figure 12-1; If this external line special communication terminal is a fixed station, then enter the program A2 work of Figure 12-2.

Figure 11 expresses the flow chart that an example is used the transit working conditional code of subscriber exchange reception of the present invention, the private identity information code of storing and send external line special communication terminal and storage external line special communication terminal, wherein:

After starting, subscriber exchange carries out initialization, initialization is according to the program setting, 1. the coverage of determining this subscriber exchange for distinguishing, function in the private identity information code of legal external line special communication terminal number (adopts 10 2 ary codes to represent for 0000000000-1111111111, decimal number is 0-1023) number segment, position code is 0000000000000000-1001110001000000 (16 2 systems, an expression 0-400Km mileage; The employing decimal number is 0-40000) number segment; After entering operating state, detect the channel of each access by the A/D encoding and decoding-modem module among Fig. 4, if the external line special communication terminal that certain channel inserts is sent its private identity information code here, subscriber exchange is received, and the legitimacy of this private identity information code judged, if the function code in this private identity information code, validated user function code section that position code is not stored for this subscriber exchange and the numeric data code in the position code section, it is illegal then should inserting the user, and this user's connection interrupted, if be validated user, then this external line special communication terminal is inserted the access channel coding of subscriber exchange, its transit working conditional code and private identity information code thereof are stored by the distribution of memory numeric order, and the code structure of storage as shown in Figure 9; Subscriber exchange is divided under it train dispatching section and the train dispatching section sign indicating number is set according to the position code in this private identity information code then, that is: the external line special communication terminal that is in the 0-100Km section belongs to 00 dispatcher-controlled territory, and the dispatcher-controlled territory sign indicating number is 00; The external line special communication terminal that is in the 100-200Km section belongs to 01 dispatcher-controlled territory, and the dispatcher-controlled territory sign indicating number is 01; The external line special communication terminal that is in the 200-300Km section belongs to 02 dispatcher-controlled territory, and the dispatcher-controlled territory sign indicating number is 10; The external line special communication terminal that is in the 300-400Km section belongs to 03 dispatcher-controlled territory, and the dispatcher-controlled territory sign indicating number is 11; Again the former dispatcher-controlled territory sign indicating number in newly-installed dispatcher-controlled territory sign indicating number and this private identity information code is checked, if equate, then this private identity information code is sent to other external line special communication terminals in same dispatcher-controlled territory, if it is unequal, then the private identity information code with other (the having identical dispatcher-controlled territory sign indicating number) external line special communication terminals in the same dispatcher-controlled territory sends to this external line special communication terminal, and then the private identity information code of this external line special communication terminal is sent to the external line special communication terminal that inserts other (having identical dispatcher-controlled territory sign indicating number) this subscriber exchange and in same dispatcher-controlled territory; Enter program C work shown in Figure 14 then.

Figure 12-1, Figure 12-2 express an example use external line special communication terminal of the present invention receive its external line special communication terminal the private identity information code and generate the flow chart of call object table, wherein:

What Figure 12-1 represented is that this external line special communication terminal is mobile external line special communication terminal; This external line special communication terminal detects the information of being sent by Public Switched Telephony Network by subscriber exchange at any time; When detecting synchronizing information, receive and the private identity information code of storage is sent by Public Switched Telephony Network by subscriber exchange other external line special communication terminal; Judge by analysis, list corresponding call object table in the private identity information code of this external line special communication terminal; At first the function code of this private identity information code is judged, if its sign is subdispatch one of (function code be among the 0000000000-0000000011), then this external line special communication terminal is listed in first row of call object table, and the dispatcher-controlled territory sign indicating number of this private identity information code is deposited in as the dispatcher-controlled territory sign indicating number in the private identity information code of this external line special communication terminal; If its sign is not subdispatch, whether be that mobile external line special communication terminal is judged then to this external line special communication terminal, if the external line special communication terminal that the private identity information code that receives characterizes is fixing external line special communication terminal, then the position code to the private identity information code of the position code of this private identity information code and this machine compares judgement, if the position that the position code of the private identity information code of the external line special communication terminal that receives is represented is in the place ahead of this external line special communication terminal moving direction, then this external line special communication terminal is listed in second row of call object table, if the position that the position code of the private identity information code of the external line special communication terminal that receives is represented is in the rear of this external line special communication terminal moving direction, then this external line special communication terminal is listed in the third line of call object table; If the external line special communication terminal that the private identity information code that receives characterizes is mobile external line special communication terminal, then the position code to the private identity information code of the position code of this private identity information code and this machine compares judgement, if the position that the position code of the private identity information code of the external line special communication terminal that receives is represented is in the place ahead of this external line special communication terminal moving direction, then this external line special communication terminal is listed in the fourth line of call object table, if the position that the position code of the private identity information code of the external line special communication terminal that receives is represented is in the rear of this external line special communication terminal moving direction, then this external line special communication terminal is listed in the fifth line of call object table; Exceed above-mentioned condition, be docile and obedient preface to the further part of call object table and deposit in; After the external line special communication terminal that the private identity information code that receives is characterized was listed the corresponding call Object table in, program changed program F work shown in Figure 13 over to.

Figure 12-2 expression to be this external line special communication terminal be fixing external line special communication terminal; This external line special communication terminal detects the information of being sent by Public Switched Telephony Network by subscriber exchange at any time; When detecting synchronizing information, receive and the private identity information code of storage is sent by Public Switched Telephony Network by subscriber exchange other external line special communication terminal; Judge by analysis, list corresponding call object table in the private identity information code of this external line special communication terminal; At first the function code of this private identity information code is judged, if its sign is subdispatch one of (function code be among the 0000000000-0000000011), then this external line special communication terminal is listed in first row of call object table, and the dispatcher-controlled territory sign indicating number of this private identity information code is deposited in as the dispatcher-controlled territory sign indicating number in the private identity information code of this external line special communication terminal; If its sign is not subdispatch, whether be that mobile external line special communication terminal is judged then to this external line special communication terminal, if the external line special communication terminal that the private identity information code that receives characterizes is fixing external line special communication terminal, then the position code to the private identity information code of the position code of this private identity information code and this external line special communication terminal compares judgement, if the position that the position code of the private identity information code of the external line special communication terminal that receives is represented is in the east of this external line special communication terminal position, then this external line special communication terminal is listed in second row of call object table, if the position that the position code of the private identity information code of the external line special communication terminal that receives is represented is in the west of this external line special communication terminal position, then this external line special communication terminal is listed in the third line of call object table; If the external line special communication terminal that the private identity information code that receives characterizes is mobile external line special communication terminal, then the position code to the private identity information code of the position code of this private identity information code and this external line special communication terminal compares judgement, if the position that the position code of the private identity information code of the external line special communication terminal that receives is represented is in the east of this external line special communication terminal position, then this external line special communication terminal is listed in the fourth line of call object table, if the position that the position code of the private identity information code of the external line special communication terminal that receives is represented is in the west of this external line special communication terminal position, then this external line special communication terminal is listed in the fifth line of call object table; Exceed above-mentioned condition, be docile and obedient preface to the further part of call object table and deposit in; After the external line special communication terminal that the private identity information code that receives is characterized was listed the corresponding call Object table in, program changed program F shown in Figure 13 over to.

Figure 13 expresses an example and uses the flow chart that external line special communication terminal of the present invention sends private calls connection sign indicating number, wherein:

When some external line special communication terminals that has been linked into subscriber exchange when waiting for communication, the Flushing status of cycle detection class of call, type of call, call object table, call send button state and this external line special communication terminal private identity information code; When a certain external line special communication terminal (main exhaling) need be to other external line special communication terminals (by exhaling) that are linked into this subscriber exchange when communicating, should (main exhaling) external line special communication terminal user select to be provided with class of call (ordinary call, operation calling or urgent call), behind the called external line special communication terminal on type of call (individual calling or group calling) and the call object table, the operation call button sends private calls and connects sign indicating number, this private calls connects sign indicating number and includes (the ordinary call of class of call sign indicating number, operation calling or urgent call), type of call sign indicating number (individual calling or group calling) reaches the quilt of the called external line special communication terminal of selecting and exhales short code on the call object table, after transmission finishes, connection is handled in exchange according to subscriber exchange, communicate with called external line special communication terminal, on-hook sent the on-hook sign indicating number after communication finished, finish to communicate to connect with called external line special communication terminal but continue to keep communicating to connect with subscriber exchange, program turns back to K point work among Figure 10 by H; If do not call out attended operation, the private identity information code that then detects this external line special communication terminal has to refresh to change, because in real work, the responsibilities of external line special communication terminal and position etc. all might change, make the private identity information code of external line special communication terminal that the change of refreshing be arranged, if refresh change, then program turns back to K point work among Figure 10 by H, if do not refresh change, program turns back to B point work among Figure 10 by E.

Figure 14 expresses the flow chart that an example is used the private calls connection sign indicating number that subscriber exchange of the present invention receives and the processing external line special communication terminal sends, wherein:

The priority decision principle that exchange in the present embodiment connects is: class of call＞high priority＞ordinary call/high medium priority/low priority, that is: be provided with 3 grades of judgements, the class of call comparative result is for the highest, guarantee fully, secondly for the priority code in the private identity information code of external line special communication terminal for having the high priority sign indicating number, other type of call is that the priority code in ordinary call, the private identity information code is the same level that is set to of high medium priority and low priority; If the situation of same level in calling, occurs, then determine to handle with the time order and function of calling out, exchanged connection to exhale earlier to fetch earlier.

After subscriber exchange enters program C, access channel to the external line special communication terminal of each access detects, if receive the on-hook sign indicating number that external line special communication terminal is sent here, it (is to finish by this subscriber exchange the exchange that is constituted between the external line special communication terminal to be connected that the exchange that then finishes its correspondence connects, but this external line special communication terminal continues to keep by communicating to connect of Public Switched Telephony Network and this subscriber exchange), if do not receive the on-hook sign indicating number of sending here by the external line special communication terminal of correspondence exchange connection, then continue to keep its exchange connection status; After this subscriber exchange receives that private calls that certain (main exhale) external line special communication terminal sends connects sign indicating number, the quilt that the private calls that this subscriber exchange sends according to this external line special communication terminal connects in the sign indicating number exhales short code to search (by exhaling) external line special communication terminal that needs connect, detect the external line special communication terminal that needs to connect and analyze judgement in the switching conditional code of this subscriber exchange, if called external line special communication terminal is in the free time, then exchanged connection immediately; If being in exchange at this subscriber exchange, called external line special communication terminal connects seizure condition, then class of call and the called external line special communication terminal that connects in the sign indicating number according to the private calls received compares at the class of call that the exchange of this subscriber exchange is connected under the seizure condition, if the class of call under the former seizure condition of called external line special communication terminal is lower than the class of call of present calling, then interrupting original exchange connects, carrying out present exchange connects, if the class of call under the former seizure condition of called external line special communication terminal is higher than the class of call of present calling, then keep original exchange to connect, will not exchange connection to present calling, and being treated to etc. to be connectedly, program is got back to the I point; Equal the class of call that original exchange connects for new class of call, then compare judgement to the priority level sign indicating number in the private identity information code of main external line special communication terminal of exhaling and the external line special communication terminal of being exhaled and with height situation that called external line special communication terminal has a priority level sign indicating number in the private identity information code of external line special communication terminal of annexation, user and other calling of high call level to high-level priority are inserted, and the calling of the user of low level priority and low class of call will not insert or interrupt its original connection; Because subscriber exchange itself has the meeting linkage function, can realize that promptly exchange simultaneously connects between the multi-user, therefore can realize the connection of group calling, the type of call sign indicating number that private calls is connected in the sign indicating number is the external line special communication terminal of group calling, after having judged User Priority and class of call, pass through the meeting exchange linkage function of subscriber exchange, promptly to multi-user's exchange linkage function, waited for or exchange to be linked into and exhaled external line special communication terminal accordingly, program turns back to the I point of this program then; Connect sign indicating number if subscriber exchange receives private calls, then detect have do not wait for switching external line special communication terminal not, if having, then enter this program J point and carry out determination processing; If do not wait for the external line special communication terminal of switching, then detect the synchronizing signal of the private identity information code of whether receiving the external line special communication terminal that sends, if receive, then enter the D point of Figure 11 program, if do not receive then the I point of this program of turning back to by G.

Embodiment as described above, owing to utilized mutual transmission and the processing of subscriber exchange to the private identity information code of each external line special communication terminal of having inserted, private calls is connected sign indicating number, subscriber exchange is to the switching conditional code of external line special communication terminal and comparing to determine of each private identity information code, realized that point-to-point communication connects and the mutual purpose of connecting of calling out between a plurality of external line special communication terminals of subscriber exchange is arrived in the public switching systems network insertion of nonpreemption processing capacity by only having, therefore has quick connection, the advantage of specific schedule communication functions such as processed and group calling connection is arranged, and realized that also communication terminal special searches the dialed number of affiliated subscriber exchange automatically, automatically be divided the dispatcher-controlled territory under being included into and when operation is called out, can easily search the function of being exhaled object.

In addition, the present invention can also be the private identity information code of the described external line special communication terminal that will store of subscriber exchange, comprise receive and this subscriber exchange is provided with, send to other external line special communication terminal; Because external line special communication terminal its private identity information code in practice that has no longer changes, therefore can in subscriber exchange, be provided with, and needn't repeatedly transmit, the workload of the subscriber exchange of transmission system is reduced, help system works.

In addition, the present invention can also be that subscriber exchange also has the private identity information code, its code structure is identical with the private identity information code structure of external line special communication terminal, and also send to the external line special communication terminal of access, can make external line special communication terminal understand the operating state of subscriber exchange like this, handled easily uses.

In addition, the present invention can also be that the call object options button of external line special communication terminal can increase, use the 1000-1 dedicated array of keys corresponding to first other external line special communication terminal in the call object table, use the 1000-2 dedicated array of keys corresponding to second other external line special communication terminal in the call object table, use the 1000-3 dedicated array of keys corresponding to the 3rd other external line special communication terminals in the call object table, analogize in proper order, and this generic key is defaulted as individual calling, when pressing this generic key, sending out method of calling is individual calling, the private calls that class of call exhales short code to form for the artificial quilt that reaches corresponding call object that is provided with connects sign indicating number, promptly can realize the function that a key is breathed out, use with handled easily.

In addition, the present invention can also be the operating state that the conditional code in the private identity information code of external line special communication terminal comprises some equipment working states, ambient condition and other relevant devices, so that external line special communication terminal is understood its operating state mutually, the convenient use.

In addition, the present invention can also be external line special communication terminal according to the environment for use situation, be standard by North and South direction; Position code information adopts GPS navigation system mode to obtain, and determines the ordering of the call object in the call object table with this, uses with convenient.

In addition, the present invention can also be that external line special communication terminal is according to the setting of function code situation to affiliated subscriber exchange dialed number, to satisfy, use with convenient to having particular job function and the demand that enters specific user's switch of the user in same geographic area not.

In addition, the present invention is provided with to group busy sign indicating number in the type of call of external line special communication terminal, realizes grouping busy function, promptly calls out to the expansion calling of group calling or to the external line special communication terminal of whole accesses to connect, to satisfy the special requirement in the real work.

In addition, the present invention can also be when the exchange switching state of subscriber exchange record storage external line special communication terminal, login sequence number, the channel number of access, the quilt that can be this external line special communication terminal of record storage are exhaled short code etc., can select as required, so that programming enforcement is convenient.

In addition, the present invention can also be when the private identity information code of subscriber exchange record storage external line special communication terminal, memory is pressed dispatcher-controlled territory, position code and function code feature to be divided and the memory allocated address area, so that searching called external line special communication terminal fast, and be convenient to programming enforcement.

In addition, the present invention receives and dispatches in the transfer of data employing dual-tone multifrequency mode of subscriber exchange and communication terminal special, and by codec conversion is to receive and dispatch behind 10 systems, connect sign indicating number for private calls, its figure place is also in 4 bit codes, be less than the phone number yardage in the existing Public Switched Telephony Network, its transmission and identification processing time are less than existing Public Switched Telephony Network processing speed, and adopt dual-tone multifrequency mode transmitting-receiving mode to be ready-made current techique, easy to implement.

In addition, the present invention can also be when subscriber exchange is judged the legitimacy of the external line special communication terminal that inserts, can be to adopt the number of external line special communication terminal in Public Switched Telephony Network that inserts judged, this number is sent here by Public Switched Telephony Network when external line special communication terminal Sending dialled number number inserts this subscriber exchange, access external line special communication terminal in the number segment that the permission that meets the setting of this subscriber exchange is inserted is judged to be validated user and is kept, the access outside line terminal in the number segment that allow to insert is not judged to be the disabled user and is interrupted so that programming and implement convenient.

The method of mutual call connection between a plurality of external line special communication terminal of the present invention, a kind of method that can arrive by the public switching systems network insertion that only has point-to-point communication connection and nonpreemption processing capacity mutual call connection between a plurality of external line special communication terminals of subscriber exchange is provided, has quick connection, the advantage that the specific schedule communication functions such as priority processing and group calling connection are arranged, and realized that communication terminal special searches the dialed number of affiliated subscriber exchange automatically, automatically be divided the dispatcher-controlled territory under being included into and when operation is called out, can search easily the function of being exhaled object, made things convenient for operation to use.

Claims

1. one kind by only having that point-to-point communication connects and the Public Switched Telephony Network of nonpreemption processing capacity is linked between a plurality of external line special communication terminals of subscriber exchange and calls out the method that connects mutually, described external line special communication terminal inserts described subscriber exchange by described Public Switched Telephony Network after through the Sending dialled number number, it is characterized in that, described external line special communication terminal has private identity information code separately, includes in this private identity information code and represents the quilt of this external line special communication terminal to exhale short code, the priority level sign indicating number, position code, function code, block code, conditional code; Described external line special communication terminal is by the definite dialed number to described subscriber exchange of the private identity information code of itself; Described external line special communication terminal sends the private identity information code of described external line special communication terminal to described subscriber exchange; Described subscriber exchange receives and stores private identity information code and the corresponding switching conditional code thereof that described external line special communication terminal sends; Described subscriber exchange docks the private identity information code of receiving and keeping storage to carry out validity decision and divides the dispatcher-controlled territory sign indicating number that the affiliated dispatcher-controlled territory of the private identity information code of storing reaches the private identity information code of determining storage, and the communicating to connect of described external line special communication terminal that does not belong to described subscriber exchange service range hung up; The private identity information code of the described external line special communication terminal that described subscriber exchange will be stored sends to and inserts described subscriber exchange and be divided in other described external line special communication terminal of same dispatcher-controlled territory with the private identity information code of storage; Described external line special communication terminal receives and other the private identity information code of described external line special communication terminal of coming is transmitted in storage by described subscriber exchange; Described external line special communication terminal is judged to other the private identity information code of described external line special communication terminal that receives that the back is arranged and is generated the call object table; Described external line special communication terminal sends private calls connection sign indicating number according to call object table and call operation, and the private calls that described external line special communication terminal sends connects the quilt that contains type of call sign indicating number, call class sign indicating number and called external line special communication terminal in the sign indicating number and exhales short code; The master that the private calls that described subscriber exchange sends according to described external line special communication terminal connects sign indicating number and storage exhales and carries out class of call and priority level with the private identity information code of the described external line special communication terminal of being exhaled and switching conditional code thereof and compare to determine the back and carry out the exchange connection of the described external line special communication terminal that this transmissions private calls is connected yard or give etc. pending.