CN102368731A - Method and system for realizing change from fax service to voice service - Google Patents
Method and system for realizing change from fax service to voice service Download PDFInfo
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- CN102368731A CN102368731A CN2011103145884A CN201110314588A CN102368731A CN 102368731 A CN102368731 A CN 102368731A CN 2011103145884 A CN2011103145884 A CN 2011103145884A CN 201110314588 A CN201110314588 A CN 201110314588A CN 102368731 A CN102368731 A CN 102368731A
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Abstract
The invention provides a method and system for realizing a change from a fax service to a voice service. In the method, a calling fax machine is softly exchanged to a second media gateway through a first media gateway to establish a conversation between the calling fax machine and a called fax machine; and after the fax is finished, the calling fax machine sends out a DCN (Design Change Notice) event to trigger a whole system to be converted to the voice service from the fax service. In the invention, after the fax is finished, the calling fax machine sends out the DCN event to trigger the whole system to be converted to the voice service from the fax service, so that the inconvenience caused by converting the fax service to the voice fax in the prior art is solved.
Description
Technical field
The present invention relates to the communications field, relate in particular under NGN (next generation network) network, voice, facsimile service carry through IP, realize the method and system of facsimile service to the speech business change.
Background technology
Because traditional communication network is different with the Media Stream coded system of modern packet communications transmission through network; Therefore the binding site at legacy network and packet network needs codec to carry out the conversion of media stream code/decode mode; The equipment of realizing this conversion is referred to as gateway; The handled Media Stream of gateway mainly comprises: voice flow, data flow etc., wherein data flow mainly refers to the signal that sends in the data equipment reciprocal processes such as facsimile machine, Modem.The mode of gateway passes data flow mainly contains: transparent transmission mode and mode T.38.
The transparent transmission mode is meant through code encoding/decoding mode G.711, handles data flow as the encoding and decoding that common voice flow can't harm.T.38 mode is meant the agreement T.38 through ITU-T, facsimile machine send follow ITU-T T.30 the facsimile signal of agreement be converted into the T.38 facsimile message that is fit to the transmission of IP bearer network and carry out transmission manner.
Under conventional communication networks, the user if need to continue to use speech business, needs the support of facsimile machine after using facsimile service.Facsimile machine in the market, behind the fax completion, some can continue conversation, and this can save the user and make a phone call in addition required extra expenses and time.Under NGN (next generation network) network, voice, facsimile service carry the fax passage of setting up during fax through IP; If G.711 transparent transmission after fax is accomplished, need continue conversation as if the user; Continue to adopt and recover conversation after G.711 transparent transmission mode transparent transmission voice are realized faxing; But the method is owing to use the fax pattern of WMG to converse, and echo elimination, silence compression etc. are in closed condition, and speech quality is very poor; If T.38,, will fail during user's communication because voice can't be packaged into T.38 message.
Summary of the invention
Seeing that above-mentioned existing in prior technology problem the objective of the invention is under packet communication network, the method that gateway realization facsimile service changes to speech business in a kind of network service is provided, simultaneously same user experience under assurance and the conventional communication networks.
The present invention for realizing the technical scheme that its goal of the invention adopts is: a kind of method that realizes change from the facsimile service to the speech business; In this method; The caller facsimile machine is set up session via soft switch through first WMG between second media gateway realization and called facsimile machine; Behind the fax completion, be altered to speech business, may further comprise the steps:
Step 1, transmit leg facsimile machine send hang-up signal (DCN signal);
Step 2, first WMG detect the hang-up signal (DCN signal) that the transmit leg facsimile machine sends, and report soft switch;
Step 3A, described soft switch receive that hang-up signal (DCN signal) back indication first WMG of described first medium gateway to report and second WMG change facsimile service are speech business;
Step 3B, first WMG detect this DCN signal, do not report this incident to give soft switch, and changing facsimile service voluntarily is speech business, and described second WMG identifies the variation of the first WMG medium type, and the change facsimile service is speech business.
Further, in above-mentioned a kind of method that realizes change from the facsimile service to the speech business: the medium bag becomes live transmission protocol message (RTP message) by the protocol massages (T.38 message) of previous computer network fax sending and receiving.
The present invention also provides a kind of system that realizes change from the facsimile service to the speech business; This system comprises transmit leg facsimile machine, receiving side facsimile machine and switch; Wherein said switch is the core control equipment soft switch of next generation network (NGN) networking, also comprises first WMG that links with the transmit leg facsimile machine and second WMG that links with receiving side facsimile machine in addition; Described first WMG and second WMG all are deployed in the IP network; Between realize communication through the IP agreement; Described transmit leg facsimile machine is provided with when the facsimile service end needs transfer language professional, sends hang-up signal (DCN signal) dispensing device of hang-up signal (DCN signal) to described first WMG.
Further, above-mentioned a kind of system that realizes change from the facsimile service to the speech business is characterized in that: passing through H.248 between described first WMG and second WMG, agreement realizes communication.
The invention solves existing facsimile service and arrive speech business two problems after changing:
1, facsimile service changes to the problem that speech quality descends after the speech business; Through detecting the DCN incident that facsimile machine sends and reporting soft switch; Control professional change by soft switch, improved calling quality on the one hand, improved the control ability of NGN equipment of the core network in addition on the one hand terminal traffic; Make can be the more accurate control appliance of operator, for the user provides finer service;
2, the change of identification Media Stream type of coding is passed through at the WMG terminal, has solved facsimile service to obstructed some problems that wait compatibility of speech business change voice, has reduced the dependence of this business to soft switch simultaneously.
Describe the present invention below in conjunction with accompanying drawing.
Description of drawings
Fig. 1 is the networking diagram of calling system of the present invention.
Fig. 2 is that WMG change facsimile service is the speech business flow chart under the soft switch control mode.
Fig. 3 is that the change facsimile service is the speech business flow chart under the media gateway controlling.
Embodiment
As shown in Figure 1; Present embodiment is a kind of system that realizes change from the facsimile service to the speech business; This system comprises transmit leg facsimile machine, receiving side facsimile machine and switch; Wherein switch is the core control equipment soft switch of next generation network (NGN) networking, also comprises first WMG that links with the transmit leg facsimile machine and second WMG that links with receiving side facsimile machine in addition; Described first WMG and second WMG all are deployed in the IP network; Between realize communication through the IP agreement; Described transmit leg facsimile machine is provided with when the facsimile service end needs transfer language professional, sends hang-up signal (DCN signal) dispensing device of hang-up signal (DCN signal) to described first WMG.
Core concept of the present invention is through detecting the fax completion signal that facsimile machine provides; Report this signal to soft switch; Indicate transmitter side facsimile machine place gateway media gateway (first WMG or WMG 1) and receiver side facsimile machine place gateway media gateway (second WMG or WMG 2) to get into speech pattern through soft switch, thereby guarantee that facsimile service carries out to what speech business was changed smoothly, guarantees calling quality; In addition; For reducing facsimile service to the dependence of speech business change to soft switch, after first WMG detected DCN (Disconnect) incident, changing facsimile service automatically was speech business; Second WMG is speech business according to the variation change facsimile service of institute's receiving media stream type, improves the compatibility of media gateway device.
With reference to Fig. 1, whole system is made up of soft switch, WMG 1, WMG 2, and soft switch is the core control equipment of NGN networking, and itself and WMG 1, WMG 2 all are deployed in IP network, between realize communication through the IP agreement, such as agreement H.248.
Embodiment 1
With reference to WMG change facsimile service under Fig. 2 soft switch control mode is the speech business flow chart, and step is following:
Step 101: the calling subscriber calls out the called subscriber, and two users carry out voice call.
Step 102: two users are respectively by the fax initiating key.
Step 103: WMG 2 detects CED or the V21 preamble signal that facsimile machine provides, and WMG 2 is given soft switch with this as fax beginning reporting events.
Step 104: fax beginning incident is received in soft switch, and 2 change speech businesses are facsimile service with WMG through signaling indicating media gateway 1.
Step 105: behind the fax completion, the transmit leg facsimile machine provides the DCN signal, and WMG 1 detects this DCN signal, reports the fax completion incident to soft switch.
After step 106, soft switch are received the fax completion incident, be speech business with WMG 2 change facsimile services through signaling indicating media gateway 1.
In the embodiment of the invention, suppose that it is transmit leg that 1 of WMG connects facsimile machine, 2 of WMGs connect facsimile machine and are the recipient.
Embodiment 2
With reference to change facsimile service under Fig. 3 media gateway controlling is the speech business flow chart, and step is following:
Step 201: the calling subscriber calls out the called subscriber, and two users carry out voice call.
Step 202: two users are respectively by the fax initiating key.
Step 203: WMG 2 detects CED or the V21 preamble signal that receiving side facsimile machine provides, and WMG 2 is given soft switch with this as fax beginning reporting events.
Step 204: fax beginning incident is received in soft switch, is facsimile service T.38 through signaling indicating media gateway 1 and WMG 2 change speech businesses.
Step 205: behind the fax completion; The transmit leg facsimile machine provides the DCN signal, and WMG 1 detects this DCN signal, does not report this incident to give soft switch; The change facsimile service is speech business, and the medium type that this moment, WMG 1 was given to WMG 2 will change.
Step 206, in receiving the Media Stream that comes from WMG 1, WMG 2 identifies the variation of WMG 1 medium type, and the change facsimile service is speech business.
In the present embodiment, suppose that it is transmit leg that 1 of WMG connects facsimile machine, 2 of WMGs connect facsimile machine and are the recipient.
Claims (6)
1. method that realization is changed from the facsimile service to the speech business; In this method; The caller facsimile machine is set up session via soft switch through first WMG between second media gateway realization and called facsimile machine; Behind the fax completion, be altered to speech business, it is characterized in that: may further comprise the steps:
Step 1, transmit leg facsimile machine send hang-up signal (DCN signal);
Step 2, first WMG detect the hang-up signal (DCN signal) that the transmit leg facsimile machine sends, and report soft switch;
Step 3, control first WMG and second WMG change facsimile service are speech business.
2. according to a kind of method that realizes change from the facsimile service to the speech business, it is characterized in that: accomplish by following step in the described step 3:
Step 3A, described soft switch receive that hang-up signal (DCN signal) back indication first WMG of described first medium gateway to report and second WMG change facsimile service are speech business.
3. according to a kind of method that realizes change from the facsimile service to the speech business, it is characterized in that: accomplish by following step in the described step 3:
Step 3B, first WMG detect this hang-up signal (DCN signal), and changing facsimile service voluntarily is speech business, and described second WMG identifies the variation of the first WMG medium type, and the change facsimile service is speech business.
4. a kind of method that realizes change from the facsimile service to the speech business according to claim 1; It is characterized in that: when described change facsimile service was speech business, the medium bag that comes out this moment became live transmission protocol message (RTP message) by the protocol massages (T.38 message) of previous computer network fax sending and receiving.
5. system that realization is changed from the facsimile service to the speech business; Comprise transmit leg facsimile machine, receiving side facsimile machine and switch; It is characterized in that: described switch is the core control equipment soft switch of next generation network (NGN) networking, also comprises first WMG that links with the transmit leg facsimile machine and second WMG that links with receiving side facsimile machine; Described first WMG and second WMG all are deployed in the IP network; Between realize communication through the IP agreement; Described transmit leg facsimile machine is provided with when the facsimile service end needs transfer language professional, sends hang-up signal (DCN signal) dispensing device of hang-up signal (DCN signal) to described first WMG.
6. a kind of system that realizes change from the facsimile service to the speech business according to claim 5 is characterized in that: passing through H.248 between described first WMG and second WMG, agreement realizes communication.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011103145884A CN102368731A (en) | 2011-10-17 | 2011-10-17 | Method and system for realizing change from fax service to voice service |
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| CN2011103145884A CN102368731A (en) | 2011-10-17 | 2011-10-17 | Method and system for realizing change from fax service to voice service |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105282390A (en) * | 2014-07-25 | 2016-01-27 | 中兴通讯股份有限公司 | Method, device and system for switching fax channel to voice channel |
| CN106937017A (en) * | 2015-12-29 | 2017-07-07 | 深圳市潮流网络技术有限公司 | A kind of fax method for intelligently routing and system based on VoIP |
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| CN1812357A (en) * | 2005-01-26 | 2006-08-02 | 华为技术有限公司 | Method for assuring clearing command reliable thansmision tofacsimile by T.38 gateway |
| CN101159802A (en) * | 2005-01-26 | 2008-04-09 | 华为技术有限公司 | Method of T.38 gateway to guarantee reliable transmission of disconnection command to electrograph |
| CN101510935A (en) * | 2009-03-05 | 2009-08-19 | 华为技术有限公司 | Facsimile method and facsimile device |
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2011
- 2011-10-17 CN CN2011103145884A patent/CN102368731A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1812357A (en) * | 2005-01-26 | 2006-08-02 | 华为技术有限公司 | Method for assuring clearing command reliable thansmision tofacsimile by T.38 gateway |
| CN101159802A (en) * | 2005-01-26 | 2008-04-09 | 华为技术有限公司 | Method of T.38 gateway to guarantee reliable transmission of disconnection command to electrograph |
| CN101510935A (en) * | 2009-03-05 | 2009-08-19 | 华为技术有限公司 | Facsimile method and facsimile device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105282390A (en) * | 2014-07-25 | 2016-01-27 | 中兴通讯股份有限公司 | Method, device and system for switching fax channel to voice channel |
| CN105282390B (en) * | 2014-07-25 | 2019-04-09 | 中兴通讯股份有限公司 | Switching method, apparatus and system of the fax channel to voice channel |
| CN106937017A (en) * | 2015-12-29 | 2017-07-07 | 深圳市潮流网络技术有限公司 | A kind of fax method for intelligently routing and system based on VoIP |
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Application publication date: 20120307 |