CN101018216A - Voice, Modem and Fax full control method - Google Patents
Voice, Modem and Fax full control method Download PDFInfo
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- CN101018216A CN101018216A CN 200710002492 CN200710002492A CN101018216A CN 101018216 A CN101018216 A CN 101018216A CN 200710002492 CN200710002492 CN 200710002492 CN 200710002492 A CN200710002492 A CN 200710002492A CN 101018216 A CN101018216 A CN 101018216A
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Abstract
The disclosed full control method for all of speech, Modem and Fax comprises: the calling user builds speech carrying channel; the first media gateway notifies the first soft exchange for the detected Fax or Modem affair; the latter indicates the first media gateway to switch into fax or modem state; the first soft exchange initiates the negotiation and building request for the fax media flow to the second soft exchange; the latter receives message and indicates the second media gateway to switch into fax or modem state; then the second soft exchange matches the fax or modem capacity with the initiator through signaling message; finally, the calling builds fax or modem channel with the called.
Description
Technical field
The present invention relates to a kind of next generation network (NGN) technology, specifically, relate to a kind of voice, Modem and Fax full control method.
Background technology
Traditional TDM network is by after setting up the voice bearer passage between calling and called, by the capability negotiation between the terminal equipment, realization Modem, Fax business.The network equipment does not participate in the terminal unit ability negotiations process, and signaling realizes the capability negotiation process of calling and called equipment room by the bearer path transparent transmission.
The gateway device of NGN network has become the technology of comparative maturity to Modem, Fax input, and this provides the foundation for the full control technology of Modem, Fax of NGN network.NGN is to be core with the soft switch, and multimedia integration business such as speech, video, data can be provided, and adopts open, standard architecture, and the next generation network of abundant business can be provided.The NGN network is that Modem, Fax business have proposed new demand, require the business realizing process that equipment of the core network can perception terminal equipment, so that for user and operator provide better service, this just requires equipment of the core network to participate in the whole service flow process of equipment.
China's application number 200310120016 discloses the implementation method of faxing in a kind of next generation network, when the two ends media gateway is carried out communication, and after an end media gateway wherein detects the fax commencing signal, the notice Media Gateway Controller; The fax encoding and decoding that Media Gateway Controller is consulted according to both sides, the parallel simultaneously media gateway to communication two party sends revises the encoding and decoding order; If when revising encoding and decoding, the port of two ends media gateway does not change, then begin fax; If when revising encoding and decoding, variation has taken place the local terminal port of a certain media gateway, then Media Gateway Controller sends the modification order to the media gateway of opposite end, and RTP far-end attribute is made amendment, and begins fax after having revised.Before media gateway detected the fax commencing signal, when consulting encoding and decoding speech, encoding and decoding were held consultation to fax.The shortcoming of this negotiation mode is identical with the negotiations process of the MODEM of TDM network, FAX terminal, and the media gateway auto-negotiation is not by soft switch, by the media gateway autonomous negotiating.
After the soft switch control mode detected the Modem signal, media gateway was the soft switch of Modem reporting events, and by the professional ability of soft switch control terminal called.But this technology does not solve the disposition of calling and called at different soft switch control domains.Owing to do not define the negotiation mechanism of signaling between control appliance,, will cause these business to realize if use different negotiation mechanisms between the control appliance of two intercommunications.
Summary of the invention
Technical problem solved by the invention provides a kind of voice, Modem, Fax full control method, help the NGN net control device and realize unified Modem, FAX operation flow, solved the intercommunication problem of the equipment such as Modem, FAX under the different soft switch control appliances.
Technical scheme is as follows:
Voice, Modem and Fax full control method, step is as follows:
(1) calling subscriber calls out the called subscriber, sets up the voice bearer passage;
(2) first media gateway are informed first soft switch with detected fax incident or MODEM incident;
(3) first soft switch indicate first media gateway to switch to FAX mode or MODEM state;
(4) first soft switch are initiated the negotiation of facsimile medium stream and are set up request to second soft switch by signaling message;
After signaling message is received in (5) second soft switch, indicate second media gateway to switch to FAX mode or MODEM state;
(6) when second media gateway switches to FAX mode or MODEM attitude, the negotiation and the coupling of fax ability or MODEM ability finished in second soft switch by signaling message and initiator; The media capability of the callee side equipment that described signaling message has;
(7) caller equipment and called equipment are set up fax passage or modem passage.
Further, described first media gateway and second media gateway are the gateway access device, are used for access terminal equipment, and accept the control of Softswitch.
Further, described first soft switch and second soft switch are NGN server control appliance, are deployed in IP network, realize communication by the IP agreement.
Step (7) further comprises, when the Modem call setup is failed, returns original call state.
Further, the step of returning original call state described in the step (7) comprises:
A, when first media gateway detects the fax completion incident, inform first soft switch;
B, first soft switch require first media gateway to switch to the voice call state;
C, first soft switch initiate to be changed to the request of voice call state to second soft switch by the re-INVITE message of SIP;
After re-INVITE is received in D, second soft switch, indicate second media gateway to switch to the voice call state;
E, second soft switch send to first soft switch with the SDP information of second media gateway;
F, first soft switch are with SDP information notification first media gateway of second media gateway;
The voice call that G, calling subscriber and called subscriber's recovery have been set up.
Further, when end of calling, caller equipment and called equipment discharge resource.
Further, the step of release resource comprises:
I, first media gateway detect onhook event and report to first soft switch;
Ii, first soft switch require first media gateway to discharge resource;
Iii, first soft switch send BYE message to second soft switch;
Iv, second soft switch require second media gateway to discharge resource.
Further, initiate modem simultaneously when calling out when caller equipment and called equipment, described first soft switch and second soft switch have the simultaneous hold negotiation mechanism.
The invention solves the control ability of NGN equipment of the core network, for operator and user service provides the service that more becomes more meticulous to terminal traffic.The full control flow of Modem that the present invention realizes helps the NGN net control device and realizes unified Modem, FAX operation flow, has solved the intercommunication problem of the equipment such as Modem, FAX under the different soft switch control appliances.Further, by full control flow, realized function such as service authentication, service billing to the user.
Description of drawings
Fig. 1, Fig. 2 are that IP access Modem/Fax calls out the structure chart of full control system;
Fig. 3 is the flow chart of Modem call setup;
Fig. 4 is that Modem calls out the simultaneous hold message flow chart that calling and called are initiated simultaneously;
Fig. 5 is a Modem end of calling flow chart;
Fig. 6 is a FAX call setup flow process;
Fig. 7 is the flow chart that fax completion returns to original call state;
Fig. 8 is the flow chart of fax completion;
Fig. 9 is the flow chart that calling and called detect the fax completion incident simultaneously.
Embodiment
With reference to the accompanying drawings the preferred embodiments of the present invention are described in detail.
With reference to shown in Figure 1, Softswitch comprises first soft switch (Softswitch1) and second soft switch (softswitch2), first soft switch (Softswitch1) and second soft switch (softswitch2) are NGN server control appliance, are deployed in IP network.Realize communication by the IP agreement between two soft switch, as Session Initiation Protocol.
Gateway device comprises first media gateway, second media gateway, and first media gateway, second media gateway are the gateway access device, are used for access terminal equipment, and accepts the control of Softswitch.Realize communication by the IP agreement between gateway device and Softswitch, as H.248, SIP etc.
With reference to shown in Figure 2, Softswitch1, softswitch2 are NGN server control appliance, are deployed in IP network.Realize communication by the IP agreement between first soft switch (soft switch 1) and two soft switch of second soft switch (soft switch 2), as Session Initiation Protocol.
For will be G.711 voice under the mode come with the fax difference, the property column of media parameter is expanded, increase attribute description a=fax, show to be facsimile service this moment that concrete form is as follows:
M=audio 8766 RTP/AVP 0; A=Fax (capital and small letter is insensitive for the new parameter that expands, sign facsimile service).
When cross-domain startup modem was professional, spreading parameter a=modem showed the current modem business that is.Concrete form is as follows:
M=audio 8766 RTP/AVP 0; A=modem (capital and small letter is insensitive for the new parameter that expands, sign modem business).
With reference to shown in Figure 3, the concrete steps of Modem call establishment are as follows:
Step 1: the calling subscriber calls out the called subscriber, sets up the voice bearer passage between the two.
At this, calling subscriber, called subscriber can initiate fax.
Step 2:, after media gateway 1 (Tandem Gateway, AG or IAD) detects the fax incident, inform soft switch 1 if the user under the soft switch 1 initiates the fax request.
Step 3: soft switch 1 requires media gateway 1 to switch to the MODEM state.
Step 4: soft switch 1 is initiated the negotiation of facsimile medium stream and is set up request to soft switch 2 by the re-INVITE message of SIP.The SDPoffer that wherein has the MODEM ability description in the re-INVITE message.
INVITE?sip:tom@beijing.com?SIP/2.0
Via:SIP/2.0/UDP?10.10.10.10
From:lianwl<sip:lianwl@zte.com.cn>;tag＝123456789
To:tom<sip:tom@beijing.com>
Call-ID:38639313@10.10.10.10
CSeq:2?INVITE
Supported:100rel
Contact:<sip:lianwl@10.10.10.10:5060>
Content-Type:application/sdp
Content-Length:...
v＝0
o＝faxgw1?2890844526?2890842807?IN?IP4?10.10.10.10
t＝0?0
c＝IN?IP4?10.10.11.11
m＝audio?8766?RTP/AVP?0
a＝modem
Step 5: after re-INVITE was received in soft switch 2, indicating media gateway 2 switched to the MODEM attitude.
Step 6: when media gateway 2 switched to the MODEM attitude, the SDP that soft switch has by 200 message (answer) content was finished the negotiation of MODEM ability with the initiator.
SIP/2.0 200?OK
Via:SIP/2.0/UDP 1.1.1.1 (address of soft switch 1)
Via:SIP/2.0/UDP?10.10.10.10
From:lianwl<sip:lianwl@zte.com.cn>;tag＝123456789
To:tom<sip:tom@beijing.com>;tag＝987654321
Call-ID:38639313@10.10.10.10
CSeq:2?INVITE
Contact:<sip:tom@20.20.20.20:5060>
Content-Type:application/sdp
Content-Length:...
v＝0
o＝faxgw2?2890844527?2890842808?IN?IP4?20.20.20.20
t＝0?0
c＝IN?IP4.20.21.21
m＝audio?8766?RTP/AVP?0
a＝modem
Step 7: soft switch 1 is informed media gateway 1 with the modem ability of media gateway 2 after receiving the SDP of soft switch 2 transmissions
Step 8: caller equipment carries out modem with called equipment and communicates by letter.
With reference to shown in Figure 4, when the calling and called of Modem made a call simultaneously, the step of simultaneous hold message was as follows:
Step 1: the calling subscriber calls out the called subscriber, sets up voice channel between the two.
At this, caller and called users can be initiated fax.
Step 2: the user under the supposition soft switch 1 initiates the fax request, after media gateway 1 (Tandem Gateway, AG or IAD) detects the Modem incident, informs soft switch 1.
Simultaneously, after media gateway 2 (Tandem Gateway, AG or IAD) detects the Modem incident, inform soft switch 2.
Step 3: soft switch 1 requires media gateway 1 to switch to the MODEM state; Soft switch 2 requires media gateway 2 to switch to the MODEM state.
Step 4: soft switch 1 is initiated the negotiation of facsimile medium stream and is set up request to soft switch 2 by the re-INVITE message of SIP.The SDPoffer that wherein has the MODEM ability description in the re-INVITE message.
Step 5: after re-INVITE is received in soft switch 2, determine the user and initiated Modem calling simultaneous hold.
After re-INVITE is received in soft switch 1, determine the user and initiated Modem calling simultaneous hold.
Step 6: soft switch 1 sends 491 message to soft switch 2; Soft switch 2 sends 491 message to soft switch 1.
Step 7: soft switch 1 starts retransmits the Reinvite timer.
Calling Side is provided with 2.1～4 seconds timers at random, and callee side is provided with 0～2 second timer at random, and timer duration is adjustable.
In the present embodiment, suppose regularly 0～2 second (10ms unit) of soft switch 2 timers.
Step 8: the timer of soft switch 2 at first arrives, and will send reinvite message to soft switch 1.
Step 9: soft switch 1 is informed media gateway 1 with the modem ability of media gateway 2 after receiving the SDP of soft switch 2 transmissions.
Step 10: caller equipment carries out modem with called equipment and communicates by letter.
Fax calls out calling and called, and the simultaneous hold flow process is consistent with above-mentioned flow process simultaneously, only makes corresponding M odem information into Fax information and gets final product.
With reference to shown in Figure 5, the concrete steps of Modem end of calling process are as follows:
Step 1: caller and called users is in the MODEM attitude or returns to the voice attitude.
Step 2: media gateway 1 detects onhook event and reports to soft switch 1.
Step 3: soft switch 1 requires media gateway 1 to discharge resource.
Step 4: soft switch 1 sends BYE message to soft switch 2.
Step 5: soft switch 2 requires media gateway 2 to discharge resource.
With reference to shown in Figure 6, the concrete steps of FAX call setup are as follows:
The calling subscriber calls out the called subscriber, sets up voice channel between the two.At this, caller and called users can be initiated fax, in the present embodiment, supposes that the user under the soft switch 1 initiates the fax request.
Step 1: after media gateway 1 (Tandem Gateway, AG or IAID) detects the fax incident, inform soft switch 1.
Step 2: soft switch 1 requires media gateway 1 to switch to FAX mode.
Step 3: soft switch 1 is initiated the negotiation of facsimile medium stream and is set up request to soft switch 2 by the re-INVITE message of SIP.
The SDP offer that wherein has the ability description of faxing in the re-INVITE message.In the present embodiment, T.38 media gateway 1 is supported simultaneously and is G.711 faxed.
INVITE?sip:tom@beijing.com?SIP/2.0
Via:SIP/2.0/UDP?10.10.10.10
From:lianwl<sip:lianwl@lianwl.zte.com>;tag＝123456789
To:tom<sip:tom@beijing.com>
Call-ID:38639313@10.10.10.10
CSeq:2?INVITE
Supported:100rel
Contact:<sip:lianwl@10.10.10.10:5060>
Content-Type:application/sdp
Content-Length:...
v＝0
o＝faxsw1?2890844526?2890842807?IN?IP4?10.10.10.10
t＝0?0
c＝IN?IP4?10.10.11.11
m＝image?49170?udptl?t38
a＝T38FaxRateManagement:transferredTCF
a＝T38FaxUdpEC:t38UDPFEC
m＝audio?8766?RTP/AVP?0
a＝fax
Step 4: after re-INVITE was received in soft switch 2, indicating media gateway 2 switched to the fax attitude.
Step 5: when media gateway 2 switches to fax during attitude, the SDP that soft switch has by 200 message (answer) content is finished the negotiation of fax ability with offer side.
In the present embodiment, reciever has been selected T.38 fax.
SIP/2.0?200?OK
Via:SIP/2.0/UDP 1.1.1.1 (address of soft switch 1)
Via:SIP/2.0/UDP?10.10.10.10
From:lianwl<sip:lianwl@zte.com.cn>;tag＝123456789
To:tom<sip:tom@beijing.com>;tag＝987654321
Call-ID:38639313@10.10.10.10
CSeq:2?INVITE
Contact:<sip:tom@20.20.20.20:5060>
Content-Type:application/sdp
Content-Length:...
v＝0
o＝faxgw2?2890844527?2890842808?IN?IP4?20.20.20.20
t＝0?0
c＝IN?IP4?20.20.21.21
m＝image?49270?udptl?t38
a＝T38FaxRateManagement:transferredTCF
a＝T38FaxUdpEC:t38UDPFEC
m＝audio?0?RTP/AVP?0
a＝fax
Step 6: soft switch 1 is informed media gateway 1 with the fax ability of media gateway 2 after receiving the SDP of soft switch 2 transmissions;
Step 7: the caller, called party carries out facsimile.
With reference to shown in Figure 7, the concrete steps that fax completion returns to original call state are as follows:
Step 1: the calling subscriber calls out the called subscriber, sets up voice channel between the two.
At this, caller and called users can be initiated fax, and the user that this official holiday is decided under the soft switch 1 initiates the fax request.
Step 2: through behind the facsimile negotiation, the user under user under the soft switch 1 and the soft switch 2 sets up fax.
Step 3: media gateway 1 detects the fax completion incident, informs soft switch 1.
Step 4: soft switch 1 requires media gateway 1 to switch to the voice call state.
Step 5: soft switch 1 initiates to be changed to the request of voice call state to soft switch 2 by the re-INVITE message of SIP.
Step 6: after re-INVITE was received in soft switch 2, indicating media gateway 2 switched to the voice call state.
Step 7: soft switch 2 sends to soft switch 1 with the SDP information of media gateway 2.
Step 8: soft switch 1 is with the SDP information notification media gateway 1 of media gateway 2.
Successful local terminal consulted in voice and far-end SDP describes because soft switch 1 has been write down, and the voice of step 4 switch just calling to be switched to preserved voice SDP last time.If the original voice channel port in opposite end does not change, soft switch 1 can not notify media gateway 1 to revise distant end media.
Step 9: caller and called users is recovered previous voice call of setting up.
With reference to shown in Figure 8, the concrete steps that discharge resource behind the fax completion are as follows:
Step 1: caller and called users is in the fax attitude or returns to the voice attitude.
Step 2: media gateway 1 detects onhook event and reports to soft switch 1.
Step 3: soft switch 1 requires media gateway 1 to discharge resource.
Step 4: soft switch 1 sends BYE message to soft switch 2.
Step 5: soft switch 2 requires media gateway 2 to discharge resource.
With reference to shown in Figure 9, the concrete steps when calling and called detect the fax completion incident simultaneously are as follows:
Step 1: the calling subscriber calls out the called subscriber, sets up voice channel between the two.Caller and called users can be initiated fax, and the user that this official holiday is decided under the soft switch 1 initiates the fax request.
Step 2: through behind the facsimile negotiation, the user under user under the soft switch 1 and the soft switch 2 sets up fax.
Step 3: media gateway 1 detects the fax completion incident, informs soft switch 1.
Step 4: soft switch 1 requires media gateway 1 to switch to the voice call state.
Step 5: media gateway 2 also detects the fax completion incident, informs soft switch 2.
Step 6: soft switch 2 requires media gateway 2 to switch to the voice call state.
Step 7: soft switch 1 initiates to be changed to the request of voice call state to soft switch 2 by the re-INVITE message of SIP.
Step 8: soft switch 2 initiates to be changed to the request of voice call state to soft switch 1 by the re-INVITE message of SIP.
Step 9: soft switch 1 sends 491 message to soft switch 2.
Step 10: soft switch 2 sends 491 message to soft switch 1.
Step 11: after receiving 491 message, soft switch 1 starts retransmits the re_INVITE timer.
At this moment, the timer duration of Calling Side is 2.1～4 seconds (is unit with 10ms).
Step 12: after receiving 491 message, soft switch 2 starts simultaneously retransmits the re_INVITE timer.
The timer duration of callee side is 0～2 second (is unit with 10ms).
Step 13: the timer of soft switch 2 is at first ended, and will send re_INVITE message to soft switch 1 again.
Step 14: soft switch 1 is finished the medium switching according to the content in the re_INVITE message, and calling and called side switches to voice status.
Calling and called detect the flow process of Modem End Event simultaneously and the flow process of Fax is handled equally.
Claims (8)
1, a kind of voice, Modem and Fax full control method, step is as follows:
(1) calling subscriber calls out the called subscriber, sets up the voice bearer passage;
(2) first media gateway are informed first soft switch with detected fax incident or MODEM incident;
(3) first soft switch indicate first media gateway to switch to FAX mode or MODEM state;
(4) first soft switch are initiated the negotiation of facsimile medium stream and are set up request to second soft switch by signaling message;
After signaling message is received in (5) second soft switch, indicate second media gateway to switch to FAX mode or MODEM state;
(6) when second media gateway switches to FAX mode or MODEM attitude, the negotiation and the coupling of fax ability or MODEM ability finished in second soft switch by signaling message and initiator; The media capability of the callee side equipment that described signaling message has;
(7) caller equipment and called equipment are set up fax passage or modem passage.
2, voice according to claim 1, Modem and Fax full control method is characterized in that, described first media gateway and second media gateway are the gateway access device, are used for access terminal equipment, and accept the control of Softswitch.
3, voice according to claim 1, Modem and Fax full control method is characterized in that, described first soft switch and second soft switch are NGN server control appliance, are deployed in IP network, realize communication by the IP agreement.
4, voice according to claim 1, Modem and Fax full control method is characterized in that, step (7) further comprises, when the Modem call setup is failed, returns original call state.
5, voice according to claim 1, Modem and Fax full control method is characterized in that, the step of returning original call state described in the step (7) comprises:
A, when first media gateway detects the fax completion incident, inform first soft switch;
B, first soft switch require first media gateway to switch to the voice call state;
C, first soft switch initiate to be changed to the request of voice call state to second soft switch by the re-INVITE message of SIP;
After re-INVITE is received in D, second soft switch, indicate second media gateway to switch to the voice call state;
E, second soft switch send to first soft switch with the SDP information of second media gateway;
F, first soft switch are with SDP information notification first media gateway of second media gateway;
The voice call that G, calling subscriber and called subscriber's recovery have been set up.
6, voice according to claim 1, Modem and Fax full control method is characterized in that, when end of calling, caller equipment and called equipment discharge resource.
7, voice according to claim 6, Modem and Fax full control method is characterized in that, the step that discharges resource comprises:
I, first media gateway detect onhook event and report to first soft switch;
Ii, first soft switch require first media gateway to discharge resource;
Iii, first soft switch send BYE message to second soft switch;
Iv, second soft switch require second media gateway to discharge resource.
8, voice according to claim 1, Modem and Fax full control method is characterized in that, initiate modem simultaneously when calling out when caller equipment and called equipment, and described first soft switch and second soft switch have the simultaneous hold negotiation mechanism.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710002492 CN101018216B (en) | 2007-01-29 | 2007-01-29 | Voice, Modem and Fax full control method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710002492 CN101018216B (en) | 2007-01-29 | 2007-01-29 | Voice, Modem and Fax full control method |
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| CN101018216A true CN101018216A (en) | 2007-08-15 |
| CN101018216B CN101018216B (en) | 2013-02-27 |
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| CN 200710002492 Expired - Fee Related CN101018216B (en) | 2007-01-29 | 2007-01-29 | Voice, Modem and Fax full control method |
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Cited By (9)
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| WO2010054577A1 (en) * | 2008-11-11 | 2010-05-20 | 华为终端有限公司 | Method, equipment and system for carrying the point of sale (pos) data service over the ip network |
| CN101883112A (en) * | 2010-06-25 | 2010-11-10 | 中兴通讯股份有限公司 | System and method for implementing full control of T30 fax soft switch in next-generation network |
| CN101459742B (en) * | 2008-05-21 | 2011-07-13 | 中兴通讯股份有限公司 | Method for establishing MODEM call in NGN system |
| CN102843353A (en) * | 2011-06-24 | 2012-12-26 | 佳能株式会社 | Communication apparatus having IPFAX function and control method thereof |
| CN104901922A (en) * | 2014-03-04 | 2015-09-09 | 中兴通讯股份有限公司 | Data service processing method and device based on session initiation protocol (SIP) |
| CN106210432A (en) * | 2016-07-21 | 2016-12-07 | 上海携程商务有限公司 | Software fax receiving system and method |
| CN107547483A (en) * | 2016-06-28 | 2018-01-05 | 华为技术有限公司 | The method and access gateway of accurate facsimile negotiation |
| CN108234498A (en) * | 2018-01-04 | 2018-06-29 | 广州市申迪计算机系统有限公司 | A kind of communication call source tracing method and system |
| CN110430165A (en) * | 2019-07-02 | 2019-11-08 | 南瑞集团有限公司 | Power scheduling soft switch multimode autonomous negotiating protocol conformance test method |
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| CN101459742B (en) * | 2008-05-21 | 2011-07-13 | 中兴通讯股份有限公司 | Method for establishing MODEM call in NGN system |
| CN101741993B (en) * | 2008-11-11 | 2013-01-02 | 华为终端有限公司 | Method, equipment and system for carrying data service of point of sale (POS)terminal by IP network |
| US8600818B2 (en) | 2008-11-11 | 2013-12-03 | Huawei Device Co., Ltd. | Method, device, and system for carrying point of sale data service over internet protocol network |
| WO2010054577A1 (en) * | 2008-11-11 | 2010-05-20 | 华为终端有限公司 | Method, equipment and system for carrying the point of sale (pos) data service over the ip network |
| CN101883112A (en) * | 2010-06-25 | 2010-11-10 | 中兴通讯股份有限公司 | System and method for implementing full control of T30 fax soft switch in next-generation network |
| WO2011160365A1 (en) * | 2010-06-25 | 2011-12-29 | 中兴通讯股份有限公司 | System, method and soft switch for realizing t30 type fax soft switch full control in next generation network (ngn) |
| CN101883112B (en) * | 2010-06-25 | 2014-07-16 | 中兴通讯股份有限公司 | System and method for implementing full control of T30 fax soft switch in next-generation network |
| CN102843353B (en) * | 2011-06-24 | 2017-04-12 | 佳能株式会社 | Communication apparatus having IPFAX function and control method thereof |
| CN102843353A (en) * | 2011-06-24 | 2012-12-26 | 佳能株式会社 | Communication apparatus having IPFAX function and control method thereof |
| CN104901922A (en) * | 2014-03-04 | 2015-09-09 | 中兴通讯股份有限公司 | Data service processing method and device based on session initiation protocol (SIP) |
| CN107547483A (en) * | 2016-06-28 | 2018-01-05 | 华为技术有限公司 | The method and access gateway of accurate facsimile negotiation |
| CN106210432A (en) * | 2016-07-21 | 2016-12-07 | 上海携程商务有限公司 | Software fax receiving system and method |
| CN108234498A (en) * | 2018-01-04 | 2018-06-29 | 广州市申迪计算机系统有限公司 | A kind of communication call source tracing method and system |
| CN108234498B (en) * | 2018-01-04 | 2020-09-22 | 广州市申迪计算机系统有限公司 | Communication call tracing method and system |
| CN110430165A (en) * | 2019-07-02 | 2019-11-08 | 南瑞集团有限公司 | Power scheduling soft switch multimode autonomous negotiating protocol conformance test method |
| CN110430165B (en) * | 2019-07-02 | 2021-11-23 | 南瑞集团有限公司 | Power dispatching soft exchange multi-state autonomous negotiation protocol consistency test method |
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