CN102487410A - 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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- CN102487410A CN102487410A CN2010105683590A CN201010568359A CN102487410A CN 102487410 A CN102487410 A CN 102487410A CN 2010105683590 A CN2010105683590 A CN 2010105683590A CN 201010568359 A CN201010568359 A CN 201010568359A CN 102487410 A CN102487410 A CN 102487410A
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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 promptly 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, internet telephone service provider's) core network with the mode of IP, accomplishes the function of IP relaying; ITSP can distribute one group of public telephone number to give IPPBX.For the IPPBX of enterprise; Generally be connected with a large amount of extension sets; Use the intercom number mutual communication through IPPBX between each extension set; Because each extension and ITSP public telephone number are not according to 1: 1 configuration, so when enterprise's extension set is dialed outside number, need convert public telephone number to and ITSP communicates.When external call is dialed enterprise phone, then dial the public telephone number of distributing to IPPBX earlier, be transferred to inner extension set again.
More than existing realization to accomplish basic conversation be fully no problem, but realize calling out then existing problems of switching.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 the IPPBX intercom number, for ITSP, it does not also know the existence of this number of C.Externally user D accomplishes after completely restricted extension C initiates first via calling and success through the public telephone number A that dials IPPBX; In the time of need calling being transferred to the public telephone number E (E can be public telephone number or other provider customer's numbers of ITSP user) of external user like 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 promptly the call record of ITSP is that A is in conversation.After C called out switching initiation the second road access success, transfer-request was sent in on-hook, and it is relevant that the call information that C sends is merely intercom number, if forward request to ITSP simply this moment, was certain to cause the switching failure.
Summary of the invention
Technical problem to be solved by this invention is, a kind of method that can successfully realize IPPBX intercom number relayed call to the public number of exterior I TSP is provided, and the system that realizes this method.
The present invention solves the problems of the technologies described above the technical scheme that is adopted to be, the method for IPPBX intercom number relayed call to external common number:
An IPPBX intercom number is successfully set up calling with two public numbers of exterior I TSP respectively through IPPBX, the call information that this two-way of IPPBX record is called out;
As the corresponding phone on-hook of the IPPBX intercom number of switching side and when making a call switching, IPPBX according to before the call information called out of the two-way of record accomplish and call out switching.
Specifically may further comprise the 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 during the IPPBX preservation first via is called out;
B, when the IPPBX intercom number as switching side; In the time of need calling being forwarded to the public number of the second exterior I TSP; The IPPBX intercom number is earlier set up the second the tunnel with the public number of the second exterior I TSP and is called out, IPPBX preserve the second the 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 said REFER message, utilizes the dialog information of the two-way calling of preserving, and makes up a reINVITE message, 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 then;
D, the public number of the second exterior I TSP send 200ok message behind IPPBX, and IPPBX utilizes the dialog information of the two-way calling of preserving, and makes up the 2nd reINVITE message, and sends 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; Public number of the first exterior I TSP and the public number of the second exterior I TSP are successfully set up calling.
Concrete, among the said step c, IPPBX utilizes the dialog information of the two-way calling of preserving, and the concrete steps that make up a reINVITE message are following:
C1, IPPBX utilize the header field information of the REFER message of obtaining, and the dialog information of from the second tunnel call conversation information of preserving, searching public number of the second exterior I TSP and IPPBX is as the dialog information in the reINVITE message;
C2, IPPBX utilize the session information of the REFER message of obtaining, and the SDP information of from the dialog information that the first via of preserving is called out, searching the public number of the first exterior I TSP is as the SDP information in the reINVITE message.
Concrete, in the said steps d, IPPBX utilizes the dialog information of the two-way calling of preserving, and the concrete steps that make up the 2nd reINVITE message are following:
D1, the IPPBX SDP information of obtaining the public number of the second exterior I TSP from the 200ok message of receiving is as the SDP information in the 2nd reINVITE message;
D2, IPPBX search the SDP information of the dialogue of 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, preserve of the mapping of IPPBX intercom number among the said IPPBX to the public number of ITSP of IPPBX;
IPPBX receives the IPPBX intercom number when calling that the public number of outside ITSP is initiated; After IPPBX is transformed to the public number of ITSP of IPPBX with the telephone number of caller by the IPPBX intercom number according to said mapping, again through the ITSP server to the public number forwarded call of outside ITSP;
When IPPBX received the calling of the public number initiation of exterior I TSP, IPPBX was according to the mode of said mapping or Auto Attendant switching, to the forwarded call of IPPBX intercom number.
Another object of the present invention provides a kind of call switching system, comprises IPPBX and ITSP server; Said ITSP server is used for distributing the public number of ITSP to IPPBX; Accomplish the route of calling out between the public number of ITSP, it is characterized in that said IPPBX is used for:
Control IPPBX intercom number and the public number of the first exterior I TSP are successfully set up the first via and are called out, and preserve the dialog information of calling and called and IPPBX in the first via calling;
When the IPPBX intercom number as switching side; In the time of need calling being forwarded to the public number of the second exterior I TSP; Control IPPBX intercom number is set up the second the tunnel with the public number of the second exterior I TSP earlier and is called out, and preserve the second the tunnel call out in the dialog information of calling and called and IPPBX;
Obtain the REFER message of the switching inquiry of sending after the on-hook of IPPBX intercom number; Utilize the dialog information of the two-way calling of preserving; Make up a reINVITE message, replace the public number of the first exterior I TSP to send a reINVITE message then to the public number of the second exterior I TSP;
Receiving the public number transmission of second exterior I TSP 200ok message behind IPPBX, utilize the dialog information of the two-way calling of preserving, IPPBX makes up the 2nd reINVITE message, and sends the 2nd reINVITE message to the public number of the first exterior I TSP.
Said IPPBX also is used for, and preserves the mapping of IPPBX intercom number to the public number of ITSP of IPPBX;
IPPBX receives the IPPBX intercom number when calling that the public number of outside ITSP is initiated; After IPPBX is transformed to the public number of ITSP of IPPBX with the telephone number of caller by the IPPBX intercom number according to said mapping, again through the ITSP server to the public number forwarded call of outside ITSP.
The invention has the beneficial effects as follows, successfully realize the calling transfer of IPPBX intercom number and the public number of exterior I TSP.
Description of drawings
Fig. 1 is the call switching system sketch map.
Fig. 2 is that embodiment calls out the switching flow chart.
Embodiment
Call switching system as shown in Figure 1 comprises IPPBX, ITSP server; IPPBX links to each other with the ITSP server through IP network; The communication terminal that links to each other with the ITSP server all is assigned the public number of ITSP (the public number of ITSP of the communication terminal that title links to each other with the ITSP server among this paper is the public number of exterior I TSP); The communication terminal of enterprises links to each other 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.
The ITSP server is used for, and distributes the public number of ITSP to IPPBX;
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 control: be responsible for communication switching and control between IPPBX intercom number and the local public number of ITSP of IPPBX, and combine the number mapping ruler, accomplish intercom number to value-added services such as the calling switching of ITSP outside number, calling transfer;
Three, number mapping: when being responsible for the public number user of IPPBX intercom number customer call exterior I TSP, from the public number of the ITSP of this locality, select as calling number.
Number corresponding relation among the IPPBX between the public number of IPPBX intercom number and ITSP can (m＞=n), the enterprise customer can plan the IPPBX intercom number according to the needs of oneself, reaches the purpose of practicing thrift local ITSP number resource for the relation of m:n.IPPBX also writes down the IPPBX intercom number number of the current this locality of having mated of the public number of each ITSP, selects a minimum public number of ITSP of coupling number in the public number of current I TSP when mating at every turn.This coupling number increases progressively when making a call, and when call release, successively decreases.Owing to preserve of the mapping of IPPBX intercom number among the IPPBX to the public number of ITSP of IPPBX; IPPBX receives the IPPBX intercom number when calling that the public number of outside ITSP is initiated; After IPPBX is transformed to the public number of ITSP of IPPBX with the telephone number of caller by the IPPBX intercom number according to above mapping, again through the ITSP server to the public number forwarded call of outside ITSP; When IPPBX received the calling of the public number initiation of exterior I TSP, IPPBX was according to utilizing above mapping perhaps to pass through the mode of Auto Attendant switching, to the forwarded call of IPPBX intercom number.
As shown in Figure 2, the FH-number transform of transferring carries out through IPPBX with calling out to transfer, and supposes that at present the 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; Contain 85148164 media information in this INVITE; Media information is SDP (Session Description Protocol) information, has described 85148164 code encoding/decoding mode in the SDP information, IP address and port number information that communication need be used;
This INVITE of F2:ITSP server forwards is to IPPBX;
After F3:IPPBX receives this INVITE, shine upon 5501 numbers that called telephone number information are converted into enterprises, and transmit this INVITE to 5501 users according to intercom number; At this moment, IPPBX through INVITE obtained 85148164 with the media information of the dialog information of IPPBX (dialogue shows as the point-to-point SIP relations of two lasting a period of times between the user agent) and 85148164;
F4:5501 user replys 180Ringing (ring-back) message to IPPBX after receiving this INVITE immediately;
F5:IPPBX transmits 180 Ringing message to the ITSP server;
F6:ITSP server forwards 180 Ringing message to 85148164 users place;
F7:5501 user sends 200 OK message to IPPBX; IPPBX obtained 5501 media information through 200 OK message, and obtained 5501 with the dialog information of IPPBX;
F8:IPPBX transmits 200 OK message to the ITSP server;
F9:ITSP server forwards 200 OK message to 85148164 users place;
F10:85148164 sends the ACK acknowledge message to the ITSP server after receiving 200 OK message;
F11:ITSP server forwards ACK confirms message to IPPBX; IPPBX preserves first via call information, said 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 transmits 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 the ACK acknowledge message;
2) the second tunnel call out: 5501 as switching side, need exhale and lead to 85148165, carries out forwarding during query.
F13:5501 initiates INVITE through IPPBX to 85148165; Carry 5501 media information in the said INVITE;
After F14:IPPBX receives 5501 INVITE that send, the telephone number information of caller is converted into the ITSP number 85148163 of IPPBX according to the intercom number mapping, and to this INVITE of ITSP server forwards; In addition, IPPBX has also obtained 5501 media information through INVITE, and obtained 5501 with the dialog information of IPPBX;
The F15:ITSP server is transmitted INVITE to 85148165;
F16:85148165 replys 180 Ringing message to the ITSP server after receiving this INVITE immediately;
F17:ITSP server forwards 180 Ringing message are to IPPBX;
F18:IPPBX transmits 180 Ringing message to 5501 places;
F19:85148165 sends 200 OK message to the ITSP server; Carried 85148165 media information in this 200 OK message;
F20:ITSP server forwards 200 OK message are to IPPBX; IPPBX obtained 85148165 media information through 200 OK message, and obtained 85148165 with the dialog information of IPPBX;
F21:IPPBX transmits 200 OK message to 5501 places;
F22:5501 sends the ACK acknowledge message to IPPBX after receiving 200 OK message; IPPBX preserves the second road call information, said 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 transmits ACK and confirms message to the ITSP server;
F24:ITSP server forwards ACK confirms message to 85148165; 85148165 receive and show that 5501 successfully set up the second the tunnel through IPPBX and 85148165 and call out after the ACK acknowledge message;
3) after 5501 on-hooks, begin to call out the switching flow process:
F25: according to the SIP standard; 5501 send REFER (a kind of particular message of Session Initiation Protocol definition) message transfers; Have in the Replaces header field in the REFER message 5501 and IPPBX between dialog information, this REFER message is to hope to send to 85148164 in existing calling switching flow process;
F26: in order to realize intercommunication with ITSP; IPPBX intercepts and captures REFER message; IPPBX inquires the dialog ensemble of communication of in the second road call information, preserving according to the Replaces header field in the REFER message, so find 85148165 and IPPBX between dialog information and 85148164 media information (call out preserve through the first via); And through this dialog information architecture reINVITE (inviting again) message, and send this reINVITE message to 85148165 place; Also carry 85148164 media information in this reINVITE message;
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: can inquire the dialog ensemble of communication of in first via call information, preserving this moment at IPPBX; And then find 85148164 and IPPBX between dialog information and according to the media information of 85148165 among the F27; Make up 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 calling in the stage switching flow process, IPPBX has realized revising through the reINVITE message in the step F 26 understanding of 85148165 pairs of distant end media (85148164); Revise the understanding of 85148164 pairs of distant end media (85148165) through the reINVITE message in the step F 29.Like this, 85148164 and 85148165 just can converse smoothly.
Claims (9)
1.IPPBX the intercom number relayed call is characterized in that to the method for the public number of exterior I TSP an IPPBX intercom number is successfully set up calling with two public numbers of exterior I TSP respectively through IPPBX, the call information that this two-way of IPPBX record is called out;
As the corresponding phone on-hook of the IPPBX intercom number of switching side and when making a call switching, IPPBX according to before the call information called out of the two-way of record accomplish and call out switching.
2. the relayed call of IPPBX intercom number is characterized in that to the method for the public number of exterior I TSP according to claim 1, specifically may further comprise the 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 during the IPPBX preservation first via is called out;
B, when the IPPBX intercom number as switching side; In the time of need calling being forwarded to the public number of the second exterior I TSP; The IPPBX intercom number is earlier set up the second the tunnel with the public number of the second exterior I TSP and is called out, IPPBX preserve the second the 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 said REFER message, utilizes the dialog information of the two-way calling of preserving, and makes up a reINVITE message, 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 then;
D, the public number of the second exterior I TSP send 200ok message behind IPPBX, and IPPBX utilizes the dialog information of the two-way calling of preserving, and makes up the 2nd reINVITE message, and sends 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; Public number of the first exterior I TSP and the public number of the second exterior I TSP are successfully set up calling.
3. the relayed call of IPPBX intercom number is characterized in that to the method for the public number of exterior I TSP according to claim 1, and among the said step c, IPPBX utilizes the dialog information of the two-way calling of preserving, and the concrete steps that make up a reINVITE message are following:
C1, IPPBX utilize the header field information of the REFER message of obtaining, and the dialog information of from the second tunnel call conversation information of preserving, searching public number of the second exterior I TSP and IPPBX is as the dialog information in the reINVITE message;
C2, IPPBX utilize the session information of the REFER message of obtaining, and the SDP information of from the dialog information that the first via of preserving is called out, searching the public number of the first exterior I TSP is as the SDP information in the reINVITE message.
4. the relayed call of IPPBX intercom number is characterized in that to the method for the public number of exterior I TSP according to claim 1, and in the said steps d, IPPBX utilizes the dialog information of the two-way calling of preserving, and the concrete steps that make up the 2nd reINVITE message are following:
D1, the IPPBX SDP information of obtaining the public number of the second exterior I TSP from the 200ok message of receiving is as the SDP information in the 2nd reINVITE message;
D2, IPPBX search the SDP information of the dialogue of 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.
5. like the method for each said IPPBX intercom number relayed call to public number of exterior I TSP of claim 1-4, it is characterized in that,
Preserve of the mapping of IPPBX intercom number among the said IPPBX to the public number of ITSP of IPPBX; IPPBX receives the IPPBX intercom number when calling that the public number of outside ITSP is initiated; After IPPBX is transformed to the public number of ITSP of IPPBX with the telephone number of caller by the IPPBX intercom number according to said mapping, again through the ITSP server to the public number forwarded call of outside ITSP;
When IPPBX received the calling of the public number initiation of exterior I TSP, IPPBX was according to the mode of said mapping or Auto Attendant switching, to the forwarded call of IPPBX intercom number.
6. like the method for each said IPPBX intercom number relayed call to public number of exterior I TSP of claim 5, it is characterized in that the coupling number of the public number of IPPBX each ITSP of record;
When IPPBX is transformed to the ITSP public number of IPPBX with the telephone number of caller by the IPPBX intercom number according to mapping; A minimum public number of ITSP of coupling number of selecting the IPPBX intercom number to be mapped to the public number of ITSP carries out conversion, and the coupling number of the public number of ITSP that will select adds 1; When the pairing calling of the public number of ITSP is released, IPPBX subtracts 1 with the coupling number of the public number of this ITSP.
7. call switching system comprises IPPBX and ITSP server, and said ITSP server is used for distributing the public number of ITSP to IPPBX, accomplishes the route of calling out between the public number of ITSP, it is characterized in that said IPPBX is used for:
Control IPPBX intercom number and the public number of the first exterior I TSP are successfully set up the first via and are called out, and preserve the dialog information of calling and called and IPPBX in the first via calling;
When the IPPBX intercom number as switching side; In the time of need calling being forwarded to the public number of the second exterior I TSP; Control IPPBX intercom number is set up the second the tunnel with the public number of the second exterior I TSP earlier and is called out, and preserve the second the tunnel call out in the dialog information of calling and called and IPPBX;
Obtain the REFER message of the switching inquiry of sending after the on-hook of IPPBX intercom number; Utilize the dialog information of the two-way calling of preserving; Make up a reINVITE message, replace the public number of the first exterior I TSP to send a reINVITE message then to the public number of the second exterior I TSP;
Receiving the public number transmission of second exterior I TSP 200ok message behind IPPBX, utilize the dialog information of the two-way calling of preserving, IPPBX makes up the 2nd reINVITE message, and sends the 2nd reINVITE message to the public number of the first exterior I TSP.
8. like the said call switching system of claim 7, it is characterized in that said IPPBX also is used for, preserve of the mapping of IPPBX intercom number to the public number of ITSP of IPPBX;
IPPBX receives the IPPBX intercom number when calling that the public number of outside ITSP is initiated; After IPPBX is transformed to the public number of ITSP of IPPBX with the telephone number of caller by the IPPBX intercom number according to said mapping, again through the ITSP server to the public number forwarded call of outside ITSP; When IPPBX receives the calling that the public number of exterior I TSP initiates, after IPPBX is the IPPBX intercom number with called telephone number by the ITSP common numbers code conversion of IPPBX according to said mapping, to the forwarded call of IPPBX intercom number.
9. like the said call switching system of claim 8, it is characterized in that said IPPBX also is used for, write down the coupling number of the public number of each ITSP;
When IPPBX is transformed to the ITSP public number of IPPBX with the telephone number of caller by the IPPBX intercom number according to mapping; A minimum public number of ITSP of coupling number of selecting the IPPBX intercom number to be mapped to the public number of ITSP carries out conversion, and the coupling number of the public number of ITSP that will select adds 1; When the pairing calling of the public number of ITSP is released, IPPBX subtracts 1 with 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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| CN102487410B (en) | 2014-05-07 |
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