WO2013091216A1

WO2013091216A1 - Fax indication method and switch device

Info

Publication number: WO2013091216A1
Application number: PCT/CN2011/084445
Authority: WO
Inventors: 陈伟
Original assignee: 华为技术有限公司
Priority date: 2011-12-22
Filing date: 2011-12-22
Publication date: 2013-06-27
Also published as: CN102511160B; CN102511160A

Abstract

Provided are a fax indication method and a switch device. The present invention can solve the problem in the prior art that an IP endpoint based on BICC control on a media gateway cannot be indicated to establish a fax bearer on a data channel since a switch device based on BICC cannot obtain fax type information.

Description

Fax indication method and switching device

Technical field

The present invention relates to a fax technology, and more particularly to a fax indication method and a switching device. Background technique

The fax service is generally initiated by establishing a voice call, and then the fax device sends a fax signal on the bearer plane to perform fax negotiation to instruct the Media Gateway (MGW) to establish a fax bearer on the data channel through the switching device. In the process of performing the fax negotiation, the switching device can indicate that the time division multiplexing (TDM) endpoint or the IP endpoint of the MGW corresponding to the switching device establishes a fax bearer on the data channel after obtaining the fax type information. To conduct fax business. For a TDM-based switching device, the fax type information corresponding to the fax signal can be detected by the TDM endpoint on the MGW. For the Session Initiation Protocol (SIP)-based switching device, the SIP signaling can be used. The corresponding fax type information reported after the other TDM endpoint detects the fax signal.

However, for a bearer independent call control (BICC)-based switching device, the switching device cannot obtain fax type information, which causes the IP gateway based on the BICC control on the media gateway to be instructed on the data channel. The fax bearer is set up, making it impossible to perform fax services. Summary of the invention

The invention provides a fax indication method and a switching device, which are used to solve the problem that the BICC control-based IP endpoint on the media gateway cannot establish the fax bearer on the data channel due to the failure of the BICC-based switching device to obtain the fax type information in the prior art. problem.

In one aspect, a method for fax indication is provided, including:

When the call is generated, the switching device sends a fax detection command to the IP gateway based on the BICC control on the media gateway, where the fax detection command is used to instruct the IP gateway based on the BICC control to detect the fax signal on the media gateway; Receiving, by the switching device, fax type information corresponding to the fax signal sent by the BICC controlled IP endpoint on the media gateway, where the fax type information is based on the media gateway

The IP endpoint controlled by the BICC is determined based on the detected fax signal;

The switching device instructs the IP gateway based on the BICC control on the media gateway to establish a fax bearer on the data channel according to the fax type information.

Another aspect provides a fax indication method, including:

The first switching device receives the fax type information corresponding to the fax signal sent by the TDM endpoint on the first media gateway, and the fax type information is determined by the TDM endpoint on the first media gateway according to the detected fax signal;

The first switching device indicates the first media gateway according to the fax type information.

The TDM endpoint and the BICC controlled IP endpoint establish a first fax bearer on the data channel; the first switching device sends the BICC signaling to the second switching device, where the BICC signaling includes the fax type information, so that The second switching device instructs the IP endpoint controlled by the BICC on the second media gateway to establish a second fax bearer on the data channel according to the fax type information.

Another aspect provides a switching device, including:

a sending unit, configured to send a fax detection command to the IP gateway controlled by the BICC on the media gateway, where the fax detection command is used to instruct the IP gateway based on the BICC control to detect the fax signal on the media gateway;

a receiving unit, configured to receive fax type information corresponding to the fax signal sent by the BICC controlled IP endpoint on the media gateway, where the fax type information is based on the media gateway

And an indicating unit, configured to, according to the fax type information, instruct the IP endpoint controlled by the BICC on the media gateway to establish a fax bearer on the data channel.

Another aspect provides a switching device, including:

a receiving unit, configured to receive the fax type information corresponding to the fax signal sent by the TDM endpoint on the first media gateway, where the fax type information is determined by the TDM endpoint on the first media gateway according to the detected fax signal;

And an indicating unit, configured to, according to the fax type information, instruct the TDM endpoint on the first media gateway and the IP endpoint controlled by the BICC to establish a first fax bearer on the data channel; a sending unit, configured to send, to another switching device, the BICC signaling, where the BICC signaling includes the fax type information, so that the another switching device indicates, based on the fax type information, that the second media gateway is based on The BICC controlled IP endpoint establishes a second fax bearer on the data channel.

According to the foregoing technical solution, the embodiment of the present invention can solve the problem that the BICC control-based IP endpoint on the media gateway cannot establish the fax bearer on the data channel due to the failure of the BICC-based switching device to obtain the fax type information in the prior art. . BRIEF DESCRIPTION OF THE DRAWINGS In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, a brief description of the drawings used in the embodiments or the prior art description will be briefly described below. The drawings are some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any inventive labor.

1 is a schematic flowchart of a fax indication method according to an embodiment of the present invention;

2 is a schematic flowchart of a fax indication method according to another embodiment of the present invention;

FIG. 3 is a schematic diagram of a network architecture of a fax indication method according to another embodiment of the present invention; FIG. 4 is a schematic flowchart of a fax indication method applicable to the network architecture diagram of FIG. 3; Schematic diagram of the fax indication method;

FIG. 6 is a schematic flowchart diagram of a fax indication method according to another embodiment of the present invention;

7 is a schematic flowchart of a fax indication method applicable to the network architecture diagram corresponding to FIG. 3; FIG. 8 is a schematic structural diagram of a switching device according to another embodiment of the present invention;

FIG. 9 is a schematic structural diagram of a switching device according to another embodiment of the present invention. The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. The embodiments are a part of the embodiments of the invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention. FIG. 1 is a schematic flowchart of a fax indication method according to an embodiment of the present invention. As shown in FIG. 1 , the fax indication method in this embodiment may include:

101. When the call is generated, the switching device sends a fax detection command to the IP gateway controlled by the BICC on the media gateway, where the fax detection command is used to instruct the IP gateway based on the BICC control on the media gateway to detect the fax signal;

102. The switching device receives the fax type information corresponding to the fax signal sent by the BICC controlled IP endpoint on the media gateway, where the fax type information is determined by the IPCC controlled IP endpoint on the media gateway according to the detected fax signal.

For example: If a high-speed fax signal is detected (for example: high-speed MODEM signal or high-speed FAX signal, etc.), the IPCC-based IP endpoint on the media gateway is determined to be a high-speed fax type; if a low-speed fax signal is detected (for example: a low-speed MODEM signal or The low-speed FAX signal, etc.), the IPCC based IPCC control on the media gateway is determined to be a low-speed fax type.

103. The switching device, according to the fax type information, instructs the IP gateway controlled by the BICC on the media gateway to establish a fax bearer on the data channel.

In this embodiment, when the call is generated, the switching device sends a fax detection command to the IP gateway based on the BICC control on the media gateway to instruct the IP gateway to detect the fax signal on the media gateway based on the BICC control, and receive the based on the media gateway. The fax type information corresponding to the fax signal sent by the IP endpoint controlled by the BICC enables the switching device to instruct the IP gateway controlled by the BICC on the media gateway to establish a fax bearer on the data channel according to the fax type information, so that the fax can be faxed. The service can solve the problem in the prior art that the BICC-based IP endpoint on the media gateway cannot establish the fax bearer on the data channel due to the failure of the BICC-based switching device to obtain the fax type information.

It should be noted that: the switching device in this embodiment may be a Mobile Switching Center (MSC), or may be a gateway MSC (also referred to as a Gateway MSC, GMSC for short), or may also be a media. The Media Gateway Control Function (MGCF) is not limited in this embodiment.

FIG. 2 is a schematic flowchart of a fax indication method according to another embodiment of the present invention. As shown in FIG. 2, the fax indication method in this embodiment may include:

201. When the call is generated, the switching device sends a fax detection command to the IP gateway based on the BICC control on the media gateway, where the fax detection command is used to indicate that the media gateway is based on the BICC. The controlled IP endpoint detects the fax signal;

202. The switching device receives the fax type information corresponding to the fax signal sent by the BICC controlled IP endpoint on the media gateway, where the fax type information is determined by the IPCC controlled IP endpoint on the media gateway according to the detected fax signal.

For example: If a high-speed fax signal is detected, the BICC-based IP endpoint on the media gateway is determined to be a high-speed fax type; if a low-speed fax signal is detected, the BICC-based IP endpoint on the media gateway is determined to be a Fast Fax type.

203. The switching device generates, according to the fax type information, an Echo Cancel (EC) control information.

For example: If it is a high-speed fax type, the switching device can generate EC control information for turning off the EC; if it is a Fast Fax type, the switching device can generate EC control information for turning on the EC.

The switching device, according to the fax type information, instructs the IP gateway controlled by the BICC on the media gateway to establish a fax bearer on the data channel;

So far, the BICC controlled IP endpoint on the above media gateway can establish a fax bearer on the data channel.

205. The switching device sets the EC parameter of the fax bearer according to the EC control information.

It can be understood that the foregoing 205 can be executed at the same time or after 204, which is not limited in this embodiment.

In this embodiment, the switching device generates EC control information according to the obtained fax type information, so that the switching device can set the fax bearer established on the data channel by the IPCC controlled IP endpoint on the media gateway according to the foregoing EC control information. The EC parameters can further ensure the reliability of the fax service.

Optionally, after the 205, if the switching device further connects to the IP bearer network through the SIP, the switching device may further send the SIP signaling to the IP bearer network, where the SIP signaling includes the fax type information and the EC control information. The method is configured to transmit the above fax type information and the foregoing EC control information to a network device that is behind.

In order to make the method provided by the embodiment of the present invention more clear, the fax indication method applicable to the network architecture shown in FIG. 3 will be taken as an example. FIG. 3 is a schematic diagram of a network architecture involved in a fax indication method according to another embodiment of the present invention, where an MGCF connects to an IP bearer network through a SIP, Connect to the GMSC via BICC. In this embodiment, the facsimile device is a call originator. To briefly explain the problem, the facsimile device corresponding to the call recipient is not shown. 4 is a schematic flowchart of a fax indication method applicable to the network architecture diagram of FIG. 3, and the fax indication method in this embodiment may include:

401. When the call is generated, the MGCF sends a fax detection command to the IP endpoint controlled by the BICC on the MGW A, where the fax detection command is used to instruct the IP endpoint controlled by the BICC to detect the fax signal on the MGW A;

402. The IP endpoint controlled by the BICC on the MGW A determines the fax type information corresponding to the fax signal according to the detected fax signal.

403. The IP endpoint controlled by the BICC on the MGW A sends the foregoing fax type information to the MGCF.

404. The MGCF generates EC control information according to the foregoing fax type information.

405. The MGCF sends, according to the foregoing fax type information, an indication message to the IP endpoint controlled by the BICC on the MGW A, to indicate that the IP endpoint controlled by the BICC on the MGW A establishes a fax bearer on the data channel.

So far, the IP endpoint controlled by the BICC on the above MGW A establishes a fax bearer on the data channel.

406. The MGCF sets the EC parameters of the fax bearer according to the foregoing EC control information. It can be understood that: 405 may be performed at the same time as or after 404, which is not limited in this embodiment.

407. The MGCF sends SIP signaling to the IP bearer network, where the SIP signaling includes the fax type information and the EC control information.

It can be understood that, in this embodiment, the other switching device can obtain the fax type information by using the method in the prior art, so as to indicate that the TDM endpoint or the IP endpoint on the MGW corresponding to the other switching device establishes a fax bearer on the data channel, Conduct a fax business.

In this embodiment, when the call is generated, the MGCF sends a fax detection command to the IP endpoint based on the BICC control on the MGW A to instruct the IP endpoint based on the BICC control on the MGW A to detect the fax signal, and receives the BICC based on the BICC. The fax type information corresponding to the fax signal sent by the controlled IP endpoint enables the MGCF to instruct the IP endpoint based on the BICC control on the MGW A to establish a fax bearing on the data channel according to the fax type information. Therefore, it is possible to carry out the facsimile service, and it is possible to solve the problem in the prior art that the BICC-based IP endpoint on the MGW A cannot establish the facsimile bearer on the data channel due to the inability of the BICC-based MGCF to obtain the facsimile type information. Further, the MGCF generates, according to the obtained fax type information, the EC control information, so that the MGCF can set the EC parameter of the fax bearer established on the data channel by the IPCC controlled IP endpoint on the MGW A according to the foregoing EC control information, thereby It can further ensure the reliability of the fax service.

FIG. 5 is a schematic flowchart of a fax indication method according to another embodiment of the present invention. As shown in FIG. 5, the fax indication method in this embodiment may include:

501. The first switching device receives the fax type information corresponding to the fax signal sent by the TDM endpoint on the first media gateway, where the fax type information is determined by the TDM endpoint on the first media gateway according to the detected fax signal.

For example: If a high-speed fax signal is detected (for example: high-speed MODEM signal or high-speed FAX signal, etc.), the TCM endpoint based on BICC control on the first media gateway is determined to be a high-speed fax type; if a low-speed fax signal is detected (for example: low-speed MODEM) The signal or low-speed FAX signal, etc., the TDM endpoint based on the BICC control on the first media gateway is determined to be a low-speed fax type.

502. The first switching device, according to the fax type information, instructs the TDM endpoint on the first media gateway and the IP endpoint controlled by the BICC to establish a first fax bearer on the data channel. It is understood that: the first fax bearer may be: The two fax bearers are included, that is, one fax bearer is a fax bearer established on the data channel by the TDM endpoint on the first media gateway; and the other fax bearer is a fax bearer established on the data channel by the IPCC controlled IP endpoint. .

503. The first switching device sends the BICC signaling to the second switching device, where the BICC signaling includes the fax type information, so that the second switching device indicates that the second media gateway is based on the BICC according to the fax type information. The IP endpoint establishes a second fax bearer on the data channel.

The foregoing BICC signaling may be existing BICC signaling, for example, Application Transport Mechanism (APM) signaling, or may be new.

The BICC signaling is not limited in this embodiment.

In this embodiment, the fax type information corresponding to the fax signal sent by the TDM endpoint on the first media gateway is received by the first switching device, and the first media is indicated according to the fax type information. The TDM endpoint on the gateway and the IP endpoint controlled by the BICC establish a first fax bearer on the data channel, so that the first switching device can send the fax type information to the second switching device by using the BICC signaling, so that the second switching device can According to the foregoing fax type information, the IP endpoint controlled by the BICC on the second media gateway is instructed to establish a second fax bearer on the data channel, so that the fax service can be performed, and the fax type cannot be obtained in the prior art because the BICC-based switching device cannot obtain the fax type. The information caused by the inability to indicate the problem of establishing a fax bearer on the data channel by the BICC controlled IP endpoint on the media gateway.

FIG. 6 is a schematic flowchart of a fax indication method according to another embodiment of the present invention. As shown in FIG. 6, the fax indication method in this embodiment may include:

601. The first switching device receives the fax type information corresponding to the fax signal sent by the TDM endpoint on the first media gateway, where the fax type information is determined by the TDM endpoint on the first media gateway according to the detected fax signal.

For example, if a high-speed fax (MODEM) signal is detected, the TDM endpoint based on the BICC control on the first media gateway is determined to be a high-speed fax type; if a low-speed fax (FAX) signal is detected, the TCM based on the BICC control on the first media gateway The endpoint is determined to be the Fast Fax type.

602. The first switching device generates EC control information according to the fax type information.

603. The first switching device indicates, according to the fax type information, that the TDM endpoint on the first media gateway and the IP endpoint controlled by the BICC establish a first fax bearer on the data channel.

604. The first switching device sets the EC parameter of the first fax bearer according to the foregoing EC control information.

For example: If it is a high-speed fax type, the first switching device can generate EC control information for turning off the EC; if it is a low-speed fax type, the first switching device can generate EC control information for turning on the EC.

605. The first switching device sends the BICC signaling to the second switching device, where the BICC signaling includes the fax type information and the EC control information, so that the second switching device indicates the second media according to the fax type information. The IP endpoint controlled by the BICC on the gateway establishes a second fax bearer on the data channel, and sets an EC parameter of the second fax bearer according to the EC control information.

The foregoing BICC signaling may be an existing BICC signaling, for example, APM signaling, or may be a new BICC signaling, which is not limited in this embodiment. In this embodiment, the first switching device generates the EC control information according to the obtained fax type information, so that the first switching device can set the TDM endpoint on the first media gateway and the IP endpoint controlled by the BICC according to the foregoing EC control information. An EC parameter of the first fax bearer established on the data channel, and the second switching device is capable of setting an EC of the second fax bearer established on the data channel by the IPCC controlled IP endpoint on the second media gateway according to the foregoing EC control information The parameters can further ensure the reliability of the fax service.

7 is a schematic flowchart of a fax indication method applicable to the network architecture diagram corresponding to FIG. 3, and the fax indication method in this embodiment may include:

701. When the fax device sends a fax signal, the TDM endpoint on the MGW B determines, according to the detected fax signal, the fax type information corresponding to the fax signal.

702. The TDM endpoint sends the foregoing fax type information to the GMSC on the MGW B.

703. The GMSC generates EC control information according to the fax type information.

704. The GMSC sends the first indication information to the TDM endpoint on the MGW B and the IP endpoint controlled by the BICC according to the foregoing fax type information, to indicate that the TDM endpoint on the MGW B and the IP endpoint controlled by the BICC establish the first on the data channel. Fax bearer;

705. The GMSC sets an EC parameter of the first fax bearer according to the foregoing EC control information.

706. The GMSC uses the APM signaling to negotiate the codec information with the MGCF, and the APM signaling is extended to include the foregoing fax type information and the foregoing EC control information.

707. The MGCF sends, according to the foregoing fax type information, the second indication information to the IP endpoint controlled by the BICC on the MGW A, to indicate that the IP endpoint controlled by the BICC on the MGW A establishes the second fax bearer on the data channel.

708. The MGCF sets an EC parameter of the second fax bearer according to the foregoing EC control information.

709. The MGCF sends SIP signaling to the IP bearer network, where the SIP signaling includes the fax type information and the EC control information.

In this embodiment, the GMSC receives the fax type information corresponding to the fax signal sent by the TDM endpoint on the MGW B, and according to the fax type information, indicates that the TDM endpoint on the MGW B and the IP endpoint controlled by the BICC are established on the data channel. a fax bearer, making the above The GMSC can send the foregoing fax type information to the MGCF through the BICC signaling, so that the MGCF can instruct the IP endpoint controlled by the BICC control on the MGW A to establish a second fax bearer on the data channel according to the above fax type information, thereby enabling the fax service to be performed. It can solve the problem in the prior art that the BICC control-based IP endpoint on the media gateway cannot establish the fax bearer on the data channel due to the inability of the BICC-based switching device to obtain the fax type information. Further, the EC control information is generated by the GMSC 4 according to the fax type information obtained, so that the GMSC can set the first fax established on the data channel by the TDM endpoint on the MGW B and the IP endpoint controlled by the BICC according to the EC control information. The EC parameters of the bearer, and the MGCF can set the EC parameters of the second fax bearer established on the data channel by the IPCC controlled IP endpoint on the MGW A according to the above EC control information, thereby further ensuring the reliability of the fax service.

It should be noted that, for the foregoing method embodiments, for the sake of simple description, they are all expressed as a series of action combinations, but those skilled in the art should understand that the present invention is not limited by the described action sequence. Because certain steps may be performed in other sequences or concurrently in accordance with the present invention. In addition, those skilled in the art should also understand that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present invention.

In the above embodiments, the descriptions of the various embodiments are different, and the parts that are not detailed in a certain embodiment can be referred to the related descriptions of other embodiments.

FIG. 8 is a schematic structural diagram of a switching device according to another embodiment of the present invention. As shown in FIG. 8, the switching device in this embodiment may include a sending unit 81, a receiving unit 82, and an indicating unit 83. The sending unit 81 is configured to send, when the call is generated, a fax detection command to the IP gateway controlled by the BICC on the media gateway, where the fax detection command is used to instruct the IP gateway based on the BICC control to detect the fax signal on the media gateway; And a fax type information corresponding to the fax signal sent by the BICC controlled IP endpoint on the media gateway, where the fax type information is determined by the BICC controlled IP endpoint on the media gateway according to the detected fax signal; The 83 is configured to, according to the fax type information, instruct the IP gateway controlled by the BICC on the media gateway to establish a fax bearer on the data channel.

The functions of the MGCF in the embodiment of the embodiment shown in FIG. 1 and FIG. 2 can be implemented by the switching device provided in this embodiment.

Further, the indicating unit 83 in this embodiment may be further used according to the above fax class. Type information, generating EC control information.

Further, the indication unit 83 in this embodiment may be further configured to set an EC parameter of the fax bearer according to the EC control information.

Further, the indication unit 83 in this embodiment may be further configured to send SIP signaling, where the SIP signaling includes the fax type information and the EC control information.

In this embodiment, when the call is generated, the switching device sends a fax detection command to the IP gateway based on the BICC control on the media gateway by the sending unit to instruct the IP gateway based on the BICC control to detect the fax signal on the media gateway, and is received by the receiving unit. The fax type information corresponding to the fax signal sent by the IPCC controlled IP endpoint on the media gateway, so that the indication unit can instruct the IP gateway based on the BICC control to establish a fax bearer on the data channel according to the fax type information. Therefore, the fax service can be performed, which can solve the problem in the prior art that the BICC control-based IP endpoint on the media gateway cannot establish the fax bearer on the data channel due to the failure of the BICC-based switching device to obtain the fax type information.

FIG. 9 is a schematic structural diagram of a switching device according to another embodiment of the present invention. As shown in FIG. 9, the switching device in this embodiment may include a receiving unit 91, an indicating unit 92, and a sending unit 93. The receiving unit 91 is configured to receive the fax type information corresponding to the fax signal sent by the TDM endpoint on the first media gateway, where the fax type information is determined by the TDM endpoint on the first media gateway according to the detected fax signal; And indicating, according to the foregoing fax type information, that the TDM endpoint on the first media gateway and the IP endpoint controlled by the BICC control establish a first fax bearer on the data channel; the sending unit 93 is configured to send the BICC signaling to another switching device, where The BICC signaling includes the above fax type information, so that the another switching device instructs the second media gateway to establish a second fax bearer on the data channel according to the BICC controlled IP endpoint according to the fax type information.

The functions of the first switching device in the embodiment corresponding to FIG. 5 and FIG. 6 and the GMSC in the embodiment corresponding to FIG. 7 can be implemented by the switching device provided in this embodiment.

Further, the indication unit 92 in this embodiment may be further configured to generate EC control information according to the above fax type information.

Further, the indicating unit 92 in this embodiment may be further configured to set the EC parameter of the first fax bearer according to the EC control information.

Further, the foregoing BICC signaling may further include the foregoing EC control information, to And causing the another switching device to set the EC parameter of the second fax bearer according to the EC control information.

In this embodiment, the switching device receives, by the receiving unit, the fax type information corresponding to the fax signal sent by the TDM endpoint on the first media gateway, and the indication unit instructs the TDM endpoint on the first media gateway and the BICC based on the fax type information. The control IP endpoint establishes a first fax bearer on the data channel, so that the sending unit can send the fax type information to another switching device through the BICC signaling, so that the another switching device can indicate the second media according to the fax type information. The IP endpoint controlled by the BICC on the gateway establishes a second fax bearer on the data channel, so that the fax service can be performed, which can solve the problem that the prior art cannot be indicated on the media gateway because the BICC-based switching device cannot obtain the fax type information. The BICC controlled IP endpoint establishes a problem with fax bearers on the data channel.

A person skilled in the art can clearly understand that, for the convenience and brevity of the description, the specific working process of the system, the device and the unit described above can refer to the corresponding process in the foregoing method embodiment, and details are not described herein again.

In the several embodiments provided herein, it should be understood that the disclosed systems, devices, and methods may be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not executed. In addition, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be electrical, mechanical or otherwise.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solution of the embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of hardware plus software functional units.

The above integrated unit implemented in the form of a software functional unit can be stored in a computer Readable in storage media. The software functional units described above are stored in a storage medium and include instructions for causing a computer device (which may be a personal computer, server, or network device, etc.) to perform portions of the steps of the methods described in various embodiments of the present invention. The foregoing storage medium includes: a USB flash drive, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk, and the like, which can store program codes. Medium.

It should be noted that the above embodiments are only for explaining the technical solutions of the present invention, and are not intended to be limiting; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that: The technical solutions described in the foregoing embodiments are modified, or some of the technical features are equivalently replaced. The modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

Claim

A method for fax indication, characterized in that it comprises:

When the call is generated, the switching device sends a fax detection command to the IP gateway based on the BICC control on the media gateway, where the fax detection command is used to instruct the IP gateway controlled by the BICC to detect the fax signal on the media gateway;

Receiving, by the switching device, fax type information corresponding to the fax signal sent by the BICC controlled IP endpoint on the media gateway, where the fax type information is based on the media gateway

The method according to claim 1, wherein the switching device instructs the IP gateway controlled by the BICC on the media gateway to establish a fax on the data channel according to the fax type information, further including :

The switching device generates echo cancellation EC control information based on the fax type information.

The method according to claim 2, wherein the switching device instructs the IP gateway based on the BICC control on the media gateway to establish a fax bearer on the data channel simultaneously or after, according to the fax type information, including :

The switching device sets an EC parameter of the fax bearer according to the EC control information.

The method according to claim 2 or 3, wherein the method further comprises: the switching device transmitting SIP signaling to the IP bearer network, where the SIP signaling includes the fax type information and the EC control information.

5. A fax indication method, comprising:

The first switching device instructs the TDM endpoint on the first media gateway and the IP endpoint controlled by the BICC to establish a first fax bearer on the data channel according to the fax type information; the first switching device performs a second exchange The device sends the BICC signaling, where the BICC signaling includes the fax type information, so that the second switching device indicates, according to the fax type information, that the IPCC controlled IP endpoint on the second media gateway is on the data channel. Establish a second fax Loaded.

The method according to claim 5, wherein the first switching device indicates that the TDM endpoint and the BICC controlled IP endpoint on the first media gateway are established on the data channel according to the fax type information. Before the first fax bearer, it also includes:

The first switching device generates EC control information according to the fax type information.

The method according to claim 6, wherein the first switching device indicates that the TDM endpoint and the BICC controlled IP endpoint on the first media gateway are established on the data channel according to the fax type information. The first fax bearer is simultaneous or after, including:

The first switching device sets an EC parameter of the first fax bearer according to the EC control information.

The method according to claim 6 or 7, wherein the BICC signaling further includes the EC control information, so that the second switching device sets the first according to the EC control information. Two fax-bearing EC parameters.

9. A switching device, comprising:

a receiving unit, configured to receive fax type information corresponding to the fax signal sent by the BICC controlled IP endpoint on the media gateway, where the fax type information is detected by the BICC controlled IP endpoint on the media gateway The fax signal to be determined;

10. The switching device according to claim 9, wherein the indicating unit is further used for

^^ Generate EC control information based on the fax type information.

The switching device according to claim 10, wherein the indicating unit is further configured to:

And setting EC parameters of the fax bearer according to the EC control information.

The switching device according to claim 10 or 11, wherein the indicating unit is further used for Sending SIP signaling to the IP bearer network, where the SIP signaling includes the fax type information and the EC control information.

13. A switching device, comprising:

The indicating unit is configured to, according to the fax type information, instruct the TDM endpoint on the first media gateway and the BICC controlled IP endpoint to establish a first fax bearer on the data channel;

a sending unit, configured to send, to another switching device, the BICC signaling, where the BICC signaling includes the fax type information, so that the another switching device indicates, based on the fax type information, that the second media gateway is based on The BICC controlled IP endpoint establishes a second fax bearer on the data channel.

14. The switching device according to claim 13, wherein the indication unit is further configured to:

^^ Generate EC control information based on the fax type information.

The switching device according to claim 14, wherein the indication unit is further configured to:

And setting an EC parameter of the first fax bearer according to the EC control information.

The switching device according to claim 14 or 15, wherein the BICC signaling further includes the EC control information, so that the another switching device sets the according to the EC control information. EC parameters carried by the second fax.