CN102487410B - Method and system for transferring internet protocol private branch exchange (IPPBX) internal number to external internet telephony service provider (ITSP) public numbers - Google Patents
Method and system for transferring internet protocol private branch exchange (IPPBX) internal number to external internet telephony service provider (ITSP) public numbers Download PDFInfo
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- CN102487410B CN102487410B CN201010568359.0A CN201010568359A CN102487410B CN 102487410 B CN102487410 B CN 102487410B CN 201010568359 A CN201010568359 A CN 201010568359A CN 102487410 B CN102487410 B CN 102487410B
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Abstract
The invention provides a method for transferring an internet protocol private branch exchange (IPPBX) internal number to external internet telephony service provider (ITSP) public numbers, and a system for realizing the method. The method comprises the following steps that: the IPPBX internal number successfully establishes calling with two ITSP public numbers through an IPPBX respectively, and the IPPBX records the calling information of the two routes of calls; and a corresponding telephone of the IPPBX internal number as a transferring part initiates calling transferring, the IPPBX finishes calling transferring according to the calling information of the two recorded routes of calls.
Description
Technical field
The present invention relates to the calling control technology in SIP (initial session protocol) field.
Background technology
IPPBX is based on IP (Internet Protocol, the Internet) PBX (Private Branch eXchange, stored-program control exchange), it can be linked into ITSP (Internet Telephony Service Provider in the mode of IP, internet telephone service provider) core network, complete the function of IP relaying; ITSP can distribute one group of public telephone number to IPPBX.For the IPPBX of enterprise, generally be connected with a large amount of extension sets, between each extension set, by IPPBX, use intercom number to communicate by letter mutually, because each extension and ITSP public telephone number are not according to the configuration of 1: 1, so when enterprise's extension set is dialed outside number, need to convert public telephone number to and ITSP communicates.When external call is dialed enterprise phone, first dial the public telephone number of distributing to IPPBX, then be transferred to inner extension set.
To complete basic call be completely no problem in existing realization above, but realize call diversion, has problems.For ease of analyzing, suppose that A, B are the public telephone numbers that ITSP distributes to IPPBX, D, E are the public telephone numbers of external user, and C is IPPBX intercom number, for ITSP, it does not also know the existence of this number of C.At external user D, by dialing the public telephone number A of IPPBX, complete after completely restricted extension C initiation first via calling success, need to be by call diversion during to the public telephone number E (E can be ITSP user's public telephone number or other provider customer's number) of external user as intercom number A in communication process, can have problems.Because in D and C communication process, IPPBX is conversing with D with public telephone number A, and the call record of ITSP is that A is in call.When C call diversion, initiate after the second road access success, transfer-request is sent in on-hook, and the call information that C sends is only relevant for intercom number, if now simply request is forwarded to ITSP, is certain to cause transferring unsuccessfully.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of and can successfully realize the method for IPPBX intercom number relayed call to the public number of exterior I TSP, and realize the system of the method.
The present invention for solving the problems of the technologies described above adopted technical scheme is, the relayed call of IPPBX intercom number is to the method for external common number:
An IPPBX intercom number is successfully set up calling with two public numbers of exterior I TSP respectively by IPPBX, and IPPBX records the call information that this two-way is called out;
In phone on-hook corresponding to the IPPBX intercom number as mediator and while initiating call diversion, IPPBX according to before the call information called out of the two-way of record complete call diversion.
Specifically comprise the following steps:
A, IPPBX intercom number are successfully set up first via calling through IPPBX and the public number of the first exterior I TSP, the dialog information of calling and called and IPPBX in the calling of the IPPBX preservation first via;
B, when IPPBX intercom number is as mediator, in the time of need to be by the public number of call diversion to the second exterior I TSP, IPPBX intercom number is first set up the second tunnel with the public number of the second exterior I TSP and is called out, IPPBX preserve the second tunnel call out in the dialog information of calling and called and IPPBX;
After c, the on-hook of IPPBX intercom number, send the inquiry of transferring of REFER message; IPPBX obtains described REFER message, and the dialog information of utilizing the two-way of preserving to call out, builds a reINVITE message, then replaces the public number of the first exterior I TSP to send a reINVITE message to the public number of the second exterior I TSP;
D, the public number of the second exterior I TSP send 200ok message after IPPBX, and the dialog information that IPPBX utilizes the two-way of preserving to call out, builds the 2nd reINVITE message, and send the 2nd reINVITE message to the public number of the first exterior I TSP;
E, the public number of the second exterior I TSP obtain the media information of the public number of the first exterior I TSP from a reINVITE message; The public number of the first exterior I TSP obtains the media information of the public number of the second exterior I TSP from the 2nd reINVITE message; The public number of the first exterior I TSP and the public number of the second exterior I TSP are successfully set up calling.
Concrete, in described step c, the dialog information that IPPBX utilizes the two-way of preserving to call out, the concrete steps that build a reINVITE message are as follows:
C1, IPPBX utilize the header field information of the REFER message of obtaining, and the dialog information of searching the public number of the second exterior I TSP and IPPBX from the second tunnel call conversation information of preserving, as the dialog information in a reINVITE message;
C2, IPPBX utilize the session information of the REFER message of obtaining, and the SDP information of searching the public number of the first exterior I TSP the dialog information of calling out from the first via of preserving, as the SDP information in a reINVITE message.
Concrete, in described steps d, the dialog information that IPPBX utilizes the two-way of preserving to call out, the concrete steps that build the 2nd reINVITE message are as follows:
D1, the IPPBX SDP information of obtaining the public number of the second exterior I TSP from the 200ok message of receiving, as the SDP information in the 2nd reINVITE message;
D2, IPPBX search the SDP information of the dialogue of the public number of the first exterior I TSP and IPPBX from the first via call conversation information of preserving, as the dialog information in the 2nd reINVITE message.
Concrete, in described IPPBX, preserve the mapping of IPPBX intercom number to the public number of ITSP of IPPBX;
When IPPBX receives the calling that IPPBX intercom number initiates to the public number of outside ITSP, IPPBX is transformed to the telephone number of caller after the public number of ITSP of IPPBX by IPPBX intercom number according to described mapping, then passes through ITSP server to the public number forwarded call of outside ITSP;
When IPPBX receives the calling of the public number initiation of exterior I TSP, IPPBX is according to the mode of described mapping or Auto Attendant switching, to the forwarded call of IPPBX intercom number.
Another object of the present invention is to provide a kind of call switching system, comprises IPPBX and ITSP server; Described ITSP server, for distributing the public number of ITSP to IPPBX; Complete the route of calling out between the public number of ITSP, it is characterized in that, described IPPBX is used for:
Control IPPBX intercom number and the public number of the first exterior I TSP and successfully set up the first via and call out, and preserve the dialog information of calling and called and IPPBX in first via calling;
When IPPBX intercom number is as mediator, in the time of need to be by the public number of call diversion to the second exterior I TSP, control IPPBX intercom number and first set up the second tunnel with the public number of the second exterior I TSP and call out, and preserve the second tunnel call out in the dialog information of calling and called and IPPBX;
Obtain the REFER message of the switching inquiry sending after the on-hook of IPPBX intercom number, the dialog information of utilizing the two-way of preserving to call out, build a reINVITE message, then replace the public number of the first exterior I TSP to send a reINVITE message to the public number of the second exterior I TSP;
Receiving the public number transmission of the second exterior I TSP 200ok message after IPPBX, the dialog information of utilizing the two-way of preserving to call out, IPPBX builds the 2nd reINVITE message, and sends the 2nd reINVITE message to the public number of the first exterior I TSP.
Described IPPBX also for, preserve the mapping of IPPBX intercom number to the public number of ITSP of IPPBX;
When IPPBX receives the calling that IPPBX intercom number initiates to the public number of outside ITSP, IPPBX is transformed to the telephone number of caller after the public number of ITSP of IPPBX by IPPBX intercom number according to described mapping, then passes through ITSP server to the public number forwarded call of outside ITSP.
The invention has the beneficial effects as follows, successfully realize the calling of IPPBX intercom number and the public number of exterior I TSP and shift.
Accompanying drawing explanation
Fig. 1 is call switching system schematic diagram.
Fig. 2 is embodiment call diversion flow chart.
Embodiment
Call switching system comprises IPPBX, ITSP server as shown in Figure 1, IPPBX is connected with ITSP server by IP network, the communication terminal being connected with ITSP server is all assigned the public number of ITSP (the public number of ITSP that claims the communication terminal being connected with ITSP server is herein the public number of exterior I TSP), the communication terminal of enterprises is connected with IPPBX, IPPBX is to these communication terminal distributing IP PBX intercom number, and IPPBX itself preserves the public number of ITSP of ITSP server-assignment.
ITSP server is used for, and to IPPBX, distributes the public number of ITSP;
IPPBX is used for following three aspects:
One, registration management: be responsible for the registration and unregistration of the public number of ITSP;
Two, call out and control: be responsible for communication switching and control between IPPBX intercom number and the public number of ITSP of IPPBX this locality, and in conjunction with number mapping rule, complete intercom number to value-added services such as the call diversion of the outside number of ITSP, calling transfers;
Three, number mapping: while being responsible for the public number user of IPPBX intercom number user call outside ITSP, select as calling number from the public number of local ITSP.
Number corresponding relation in IPPBX between the public number of IPPBX intercom number and ITSP can be relation (the m >=n) of m:n, enterprise customer can plan IPPBX intercom number according to the needs of oneself, reaches the object of saving local ITSP number resource.IPPBX also records the current local IPPBX intercom number number having mated of the public number of each ITSP, selects to mate in the public number of current I TSP a public number of ITSP of number minimum while mating at every turn.This coupling number increases progressively when making a call, and when call release, successively decreases.Owing to preserving the mapping of IPPBX intercom number to the public number of ITSP of IPPBX in IPPBX; When IPPBX receives the calling that IPPBX intercom number initiates to the public number of outside ITSP, IPPBX is transformed to the telephone number of caller after the public number of ITSP of IPPBX by IPPBX intercom number according to above mapping, then passes through ITSP server to the public number forwarded call of outside ITSP; When IPPBX receives the calling of the public number initiation of exterior I TSP, IPPBX is according to the mode of utilizing above mapping or transferring by Auto Attendant, to the forwarded call of IPPBX intercom number.
As shown in Figure 2, transfer FH-number transform and call diversion are undertaken by IPPBX, suppose that at present ITSP server has distributed the public number of ITSP to certain enterprise: 85148163.
1) first via is called out: the public number user 85148164 of exterior I TSP dials 85148163.
F1:85148164 initiates INVITE (invitation) message, in this INVITE, contain 85148164 media information, media information is SDP (Session Description Protocol) information, 85148164 code encoding/decoding mode has been described, IP address and port number information that communication need to be used in SDP information;
F2:ITSP server forwards this INVITE to IPPBX;
F3:IPPBX receives after this INVITE, and according to intercom number, mapping is converted into 5501 numbers of enterprises by called telephone number information, and forwards this INVITE to 5501 users; Now, IPPBX by INVITE obtained 85148164 with the dialog information (dialogue, shows as the point-to-point SIP relation continuing for some time between two user agents) of IPPBX and 85148164 media information;
F4:5501 user replys 180Ringing (ring-back) message immediately to IPPBX after receiving this INVITE;
F5:IPPBX forwards 180 Ringing message to ITSP server;
F6:ITSP server forwards 180 Ringing message to 85148164 user places;
F7:5501 user sends 200 OK message to IPPBX; IPPBX obtained 5501 media information by 200 OK message, and obtained 5501 with the dialog information of IPPBX;
F8:IPPBX forwards 200 OK message to ITSP server;
F9:ITSP server forwards 200 OK message to 85148164 user places;
F10:85148164 sends ACK acknowledge message to ITSP server after receiving 200 OK message;
F11:ITSP server forwards ACK and confirms message to IPPBX; IPPBX preserves first via call information, described first via call information comprise 5501 with the dialog information of IPPBX, 85148164 and the dialog information of IPPBX, 85148164 media information, 5501 media information;
F12:IPPBX forwards ACK and confirms message to 5501; 5501 receive and show that 85148164 successfully set up the first via through IPPBX and 5501 and call out after ACK acknowledge message;
2) call out on the second tunnel: 5501 as mediator, need to call through 85148165, carries out forwarding during query.
F13:5501 by IPPBX to 85148165 initiation INVITE; In described INVITE, carry 5501 media information;
F14:IPPBX receives after 5501 INVITE that send, and according to intercom number, mapping is converted into the ITSP number 85148163 of IPPBX by the telephone number information of caller, and forwards this INVITE to ITSP server; In addition, IPPBX has also obtained 5501 media information by INVITE, and obtained 5501 with the dialog information of IPPBX;
F15:ITSP server is to 85148165 forwarding INVITE;
F16:85148165 replys 180 Ringing message immediately to ITSP server after receiving this INVITE;
F17:ITSP server forwards 180 Ringing message to IPPBX;
F18:IPPBX forwards 180 Ringing message to 5501 places;
F19:85148165 sends 200 OK message to ITSP server; In this 200 OK message, carried 85148165 media information;
F20:ITSP server forwards 200 OK message to IPPBX; IPPBX obtained 85148165 media information by 200 OK message, and obtained 85148165 with the dialog information of IPPBX;
F21:IPPBX forwards 200 OK message to 5501 places;
F22:5501 sends ACK acknowledge message to IPPBX after receiving 200 OK message; IPPBX preserves the second road call information, described the second road call information comprise 5501 with the dialog information of IPPBX, 85148165 and the dialog information of IPPBX, 85148165 media information, 5501 media information;
F23:IPPBX forwards ACK and confirms message to ITSP server;
F24:ITSP server forwards ACK and confirms message to 85148165; 85148165 receive and show that 5501 successfully set up the second tunnel through IPPBX and 85148165 and call out after ACK acknowledge message;
3), after 5501 on-hooks, start call diversion flow process:
F25: according to SIP standard, 5501 send REFER (a kind of particular message of Session Initiation Protocol definition) message transfers, in Replaces header field in REFER message with 5501 and IPPBX between dialog information, this REFER message in existing call diversion flow process, be wish send to 85148164;
F26: in order to realize intercommunication with ITSP, IPPBX intercepts and captures REFER message, IPPBX is according to the Replaces header field in REFER message, inquire the dialog information aggregate of preserving in the second road call information, and then find 85148165 and IPPBX between dialog information and 85148164 media information (call out and preserve by the first via), and by this dialog information architecture reINVITE (inviting again) message, and send this reINVITE message to 85148165 place; In this reINVITE message, also carry 85148164 media information;
F27:85148165 replys 200OK message to IPPBX after receiving reINVITE message, and 85148165 have carried its media information (SDP information) in this message;
F28:IPPBX replys ACK again and confirms message to 85148165;
F29: now can inquire the dialog information aggregate of preserving in first via call information at IPPBX, and then find 85148164 and IPPBX between dialog information and according to the media information of 85148165 in F27, build reINVITE (inviting again) message, and send this reINVITE message to 85148164 place;
F30:85148164 replys 200OK message to IPPBX after receiving reINVITE message;
F31:IPPBX replys ACK again and confirms message to 85148164;
Through the 3rd) after the call diversion flow process in stage, IPPBX has realized the understanding of revising 85148165 pairs of distant end media (85148164) by the reINVITE message in step F 26; By the reINVITE message in step F 29, revise the understanding of 85148164 pairs of distant end media (85148165).Like this, 85148164 and 85148165 just can converse smoothly.
Claims (8)
- The relayed call of 1.IPPBX intercom number, to the method for the public number of exterior I TSP, is characterized in that, an IPPBX intercom number is successfully set up calling with two public numbers of exterior I TSP respectively by IPPBX, and IPPBX records the call information that this two-way is called out;In phone on-hook corresponding to the IPPBX intercom number as mediator and while initiating call diversion, IPPBX according to before the call information called out of the two-way of record complete call diversion;Specifically comprise the following steps:A, IPPBX intercom number are successfully set up first via calling through IPPBX and the public number of the first exterior I TSP, the dialog information of calling and called and IPPBX in the calling of the IPPBX preservation first via;B, when IPPBX intercom number is as mediator, in the time of need to be by the public number of call diversion to the second exterior I TSP, IPPBX intercom number is first set up the second tunnel with the public number of the second exterior I TSP and is called out, IPPBX preserve the second tunnel call out in the dialog information of calling and called and IPPBX;After c, the on-hook of IPPBX intercom number, send the inquiry of transferring of REFER message; IPPBX obtains described REFER message, and the dialog information of utilizing the two-way of preserving to call out, builds a reINVITE message, then replaces the public number of the first exterior I TSP to send a reINVITE message to the public number of the second exterior I TSP;D, the public number of the second exterior I TSP send 200ok message after IPPBX, and the dialog information that IPPBX utilizes the two-way of preserving to call out, builds the 2nd reINVITE message, and send the 2nd reINVITE message to the public number of the first exterior I TSP;E, the public number of the second exterior I TSP obtain the media information of the public number of the first exterior I TSP from a reINVITE message; The public number of the first exterior I TSP obtains the media information of the public number of the second exterior I TSP from the 2nd reINVITE message; The public number of the first exterior I TSP and the public number of the second exterior I TSP are successfully set up calling.
- 2. the relayed call of IPPBX intercom number, to the method for the public number of exterior I TSP, is characterized in that as claimed in claim 1, in described step c, and the dialog information that IPPBX utilizes the two-way of preserving to call out, the concrete steps that build a reINVITE message are as follows:C1, IPPBX utilize the header field information of the REFER message of obtaining, and the dialog information of searching the public number of the second exterior I TSP and IPPBX from the second tunnel call conversation information of preserving, as the dialog information in a reINVITE message;C2, IPPBX utilize the session information of the REFER message of obtaining, and the SDP information of searching the public number of the first exterior I TSP the dialog information of calling out from the first via of preserving, as the SDP information in a reINVITE message.
- 3. the relayed call of IPPBX intercom number, to the method for the public number of exterior I TSP, is characterized in that as claimed in claim 1, in described steps d, and the dialog information that IPPBX utilizes the two-way of preserving to call out, the concrete steps that build the 2nd reINVITE message are as follows:D1, the IPPBX SDP information of obtaining the public number of the second exterior I TSP from the 200ok message of receiving, as the SDP information in the 2nd reINVITE message;D2, IPPBX search the SDP information of the dialogue of the public number of the first exterior I TSP and IPPBX from the first via call conversation information of preserving, as the dialog information in the 2nd reINVITE message.
- 4. as described in claim 1-3 any one, the relayed call of IPPBX intercom number, to the method for the public number of exterior I TSP, is characterized in that,In described IPPBX, preserve the mapping of IPPBX intercom number to the public number of ITSP of IPPBX;When IPPBX receives the calling that IPPBX intercom number initiates to the public number of outside ITSP, IPPBX is transformed to the telephone number of caller after the public number of ITSP of IPPBX by IPPBX intercom number according to described mapping, then passes through ITSP server to the public number forwarded call of outside ITSP;When IPPBX receives the calling of the public number initiation of exterior I TSP, IPPBX is according to the mode of described mapping or Auto Attendant switching, to the forwarded call of IPPBX intercom number.
- 5. the relayed call of IPPBX intercom number, to the method for the public number of exterior I TSP, is characterized in that as claimed in claim 4, and IPPBX records the coupling number of the public number of each ITSP;When IPPBX is transformed to the ITSP public number of IPPBX by the telephone number of caller by IPPBX intercom number according to mapping, the public number of ITSP that the coupling of selecting IPPBX intercom number to be mapped to the public number of ITSP is counted minimum converts, and the coupling number of the public number of ITSP of this selection is added to 1; When the corresponding calling of the public number of ITSP is released, IPPBX subtracts 1 by the coupling number of the public number of this ITSP.
- 6. call switching system, comprises IPPBX and ITSP server, and described ITSP server, for distributing the public number of ITSP to IPPBX, completes the route of calling out between the public number of ITSP, it is characterized in that, described IPPBX is used for:Control IPPBX intercom number and the public number of the first exterior I TSP and successfully set up the first via and call out, and preserve the dialog information of calling and called and IPPBX in first via calling;When IPPBX intercom number is as mediator, in the time of need to be by the public number of call diversion to the second exterior I TSP, control IPPBX intercom number and first set up the second tunnel with the public number of the second exterior I TSP and call out, and preserve the second tunnel call out in the dialog information of calling and called and IPPBX;Obtain the REFER message of the switching inquiry sending after the on-hook of IPPBX intercom number, the dialog information of utilizing the two-way of preserving to call out, build a reINVITE message, then replace the public number of the first exterior I TSP to send a reINVITE message to the public number of the second exterior I TSP;Receiving the public number transmission of the second exterior I TSP 200ok message after IPPBX, the dialog information of utilizing the two-way of preserving to call out, IPPBX builds the 2nd reINVITE message, and sends the 2nd reINVITE message to the public number of the first exterior I TSP.
- 7. call switching system as claimed in claim 6, is characterized in that, described IPPBX also for, preserve the mapping of IPPBX intercom number to the public number of ITSP of IPPBX;When IPPBX receives the calling that IPPBX intercom number initiates to the public number of outside ITSP, IPPBX is transformed to the telephone number of caller after the public number of ITSP of IPPBX by IPPBX intercom number according to described mapping, then passes through ITSP server to the public number forwarded call of outside ITSP; When IPPBX receives the calling of the public number initiation of exterior I TSP, after IPPBX is IPPBX intercom number by called telephone number by the ITSP common numbers code conversion of IPPBX according to described mapping, to the forwarded call of IPPBX intercom number.
- 8. call switching system as claimed in claim 7, is characterized in that, described IPPBX also for, record the coupling number of the public number of each ITSP;When IPPBX is transformed to the ITSP public number of IPPBX by the telephone number of caller by IPPBX intercom number according to mapping, the public number of ITSP that the coupling of selecting IPPBX intercom number to be mapped to the public number of ITSP is counted minimum converts, and the coupling number of the public number of ITSP of this selection is added to 1; When the corresponding calling of the public number of ITSP is released, IPPBX subtracts 1 by the coupling number of the public number of this ITSP.
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| CN201010568359.0A CN102487410B (en) | 2010-12-01 | 2010-12-01 | Method and system for transferring internet protocol private branch exchange (IPPBX) internal number to external internet telephony service provider (ITSP) public numbers |
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| CN201010568359.0A CN102487410B (en) | 2010-12-01 | 2010-12-01 | Method and system for transferring internet protocol private branch exchange (IPPBX) internal number to external internet telephony service provider (ITSP) public numbers |
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| CN107197111B (en) * | 2017-07-21 | 2019-12-31 | 迈普通信技术股份有限公司 | Call forwarding method, system and IPPBX |
| CN111263013A (en) * | 2018-12-03 | 2020-06-09 | 鼎桥通信技术有限公司 | Method and system for calling back private network terminal by public network terminal |
| CN111278082A (en) * | 2020-01-21 | 2020-06-12 | 中移（杭州）信息技术有限公司 | Terminal communication device, method, system, equipment and storage medium |
| CN114268611A (en) * | 2021-12-20 | 2022-04-01 | 迈普通信技术股份有限公司 | Anti-theft calling method and system of network telephone, relay gateway and IPPBX |
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| US7369539B1 (en) * | 1999-02-12 | 2008-05-06 | Nortel Networks Limited | System and method for providing service control to a single telephone end terminal from multiple service providers |
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