CN103581495B - Process method and the gateway device of facsimile call - Google Patents
Process method and the gateway device of facsimile call Download PDFInfo
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- CN103581495B CN103581495B CN201210268587.5A CN201210268587A CN103581495B CN 103581495 B CN103581495 B CN 103581495B CN 201210268587 A CN201210268587 A CN 201210268587A CN 103581495 B CN103581495 B CN 103581495B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/00127—Connection or combination of a still picture apparatus with another apparatus, e.g. for storage, processing or transmission of still picture signals or of information associated with a still picture
- H04N1/00204—Connection or combination of a still picture apparatus with another apparatus, e.g. for storage, processing or transmission of still picture signals or of information associated with a still picture with a digital computer or a digital computer system, e.g. an internet server
- H04N1/00209—Transmitting or receiving image data, e.g. facsimile data, via a computer, e.g. using e-mail, a computer network, the internet, I-fax
- H04N1/00214—Transmitting or receiving image data, e.g. facsimile data, via a computer, e.g. using e-mail, a computer network, the internet, I-fax details of transmission
- H04N1/0022—Transmitting or receiving image data, e.g. facsimile data, via a computer, e.g. using e-mail, a computer network, the internet, I-fax details of transmission involving facsimile protocols or a combination of facsimile protocols and computer data transmission protocols
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/66—Arrangements for connecting between networks having differing types of switching systems, e.g. gateways
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M7/00—Arrangements for interconnection between switching centres
- H04M7/006—Networks other than PSTN/ISDN providing telephone service, e.g. Voice over Internet Protocol (VoIP), including next generation networks with a packet-switched transport layer
- H04M7/0066—Details of access arrangements to the networks
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/32—Circuits or arrangements for control or supervision between transmitter and receiver or between image input and image output device, e.g. between a still-image camera and its memory or between a still-image camera and a printer device
- H04N1/327—Initiating, continuing or ending a single-mode communication; Handshaking therefor
- H04N1/32765—Initiating a communication
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/32—Circuits or arrangements for control or supervision between transmitter and receiver or between image input and image output device, e.g. between a still-image camera and its memory or between a still-image camera and a printer device
- H04N1/327—Initiating, continuing or ending a single-mode communication; Handshaking therefor
- H04N1/32789—Details of handshaking
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M2201/00—Electronic components, circuits, software, systems or apparatus used in telephone systems
- H04M2201/52—Telephonic communication in combination with fax communication
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Computer Networks & Wireless Communication (AREA)
- General Engineering & Computer Science (AREA)
- Computing Systems (AREA)
- Facsimiles In General (AREA)
- Facsimile Transmission Control (AREA)
Abstract
The present invention proposes a kind of in the method being connected on the gateway of IP network process G3 Fax calling with reception facsimile machine by transmission facsimile machine, the method includes: when receiving the digital identification signal DIS receiving facsimile machine transmission, check that the error correction mode ECM position in this digital identification signal is set the most；And, in the case of described ECM position is set, remove described ECM position, in order to by sending the digital identification signal DIS non-ECM facsimile call of initiation that facsimile machine is eliminated based on ECM position.Present invention also offers a kind of gateway device that transmission facsimile machine and reception facsimile machine are connected to IP network.
Description
Technical field
The present invention relates to communication network, relate more specifically to process G3 Fax in a communication network and exhale
The method cried and gateway device.
Background technology
The T.30 agreement that International Telecommunication Union ITU issues in JIUYUE, 2005 is based on PSTN network
The fax sending and receiving specification of Group 3 Facsimile Equipment (hereinafter referred to as G3 facsimile machine) (refer to SERIES
T:TERMINALS FOR TELEMATIC SERVICES, Procedures for
document facsimile transmission in the general switched telephone
Network).The protocol define fax sending and receiving machine start to consult, send before message, send message,
The command interaction in each stage sent after message and split off and corresponding processing procedure.
The T.38 agreement that ITU issues in JIUYUE, 2005 is that G3 Fax on ip networks is real-time
Communication standard (refers to SERIES T:Procedures for real-time Group3 facsimile
Communication over IP networks).T.38 the fasystem transmitting procedure defined, except
Including the transmission of PSTN or ISDN part, also include the transmission of IP network part.T.38
In framework, send gateway and be connected to caller G3 facsimile machine, receive gateway and be connected to called G3 facsimile machine.
After facsimile signal first passes around the modulation of voice/fax gateway, by udp protocol in an ip network
Form transmission with Fax over IP bag.
ECM mode is a kind of for the biography after page data T.4 coding of T.30 agreement regulation
Defeated mode.It is divided into several pieces a page data, and a block comprises 256 frames, and a frame is 64 bytes
Or 256 bytes, can be in digital identification signal (DIS)/digital command signal (DCS) stage
Consult.Send facsimile machine in units of frame, send page data, need to retransmit when receiving facsimile machine
Time, it is only necessary to send commands to send facsimile machine and indicate which frame needs to retransmit, then send facsimile machine
Only retransmit these frame data.ECM mode can strengthen the error correcting capability of fax, and it is mutual to accelerate fax
Efficiency.
In current use, caller and called G3 facsimile machine are all arranged to what G3 facsimile machine was supported
But ECM mode, sends and receives gateway and be configured to use T.38 receive gateway be likely to can not
Correctly support from the T4ECM packet sending gateway.When caller G3 facsimile machine and called G3 are passed
Prototype holds consultation, for when T.38 calling use ECM mode, T.38 to call always failure, especially
It is in the case of the gateway of different suppliers carries out intercommunication.A kind of existing solution is grasped as follows
Make:
-at sending direction, send the gateway demodulation V.21DIS/DCS HDLC from TDM side
(HDLC=high-level data link control procedure) signal, but do not change ECM, then signal
It is packaged into IFP packet；
-receiving direction, receive gateway and receive from the V.21IFP packet of IP network, but not
Changing ECM, then packet is modulated into V.21HDLC signal；
If consulted when gateway does not support the call setup such as using SDP agreement
T38FaxMaxDatagram value, causes sending gateway and the HDLC frame data that complete is only beaten
Being bundled into an IFP bag, then this IFP bag very greatly (272 bytes), and can receive gateway one
As the IFP bag received is done buffered, then restricted to the size of the IFP bag received.
Due to not clear stipulaties in T.38 specification, this is limited by the gateway device of each producer is not phase
With, concrete processing mode is the most identical.If receiving the maximum of the gateway IFP bag to receiving
When being smaller in size than 272 bytes, direct result is exactly that it can not correctly process this kind of big IFP bag；
Even if t38FaxMaxDatagram is consulted by some gateway supports at call establishment stage, but
It is the soft switch negotiation of not supporting this parameter, or IP network side peer gateway does not support the association of this parameter
Business, causes sending gateway and the HDLC frame data that complete is only packaged into an IFP bag, then
The size of this IFP bag can very big (272 bytes), there will be again and above-mentioned can not process
The situation of this kind of big IFP bag.In actual applications, often occur because soft switch networking complexity makes
Gateway handoff speed is slow or gateway is to the fax event detection situation such as unsuccessfully, because T.38 gateway is to DIS
The intervention of signal can only be carried out at T.38 FAX mode, therefore, when there is both of these case, can cause
DIS signal arrives at voice status transparent transmission (with voice mode) and sends facsimile machine.Cause sending facsimile machine
The DCS frame signal replied, to select ECM mode to send fax page message, finally still results in difference
T.38 the gateway of producer is sending facsimile machine and reception facsimile machine is all consulted into and sent biography in ECM mode
True page message.Fig. 1 b illustrates deficiency of the prior art.
In sum, in existing solution, when consulting caller G3FE and called G3FE to T.38
When calling uses ECM mode, owing to gateway can not change transmission and receives in both direction V.21
ECM in DIS/DCS HDLC signal, sends gateway and will send incorrect T4 to receiving gateway
ECM is grouped so that receives gateway and can not properly process these T4ECM received from equity gateway
Packet.As a result, T.38 facsimile call will failure.
Summary of the invention
In order to overcome disadvantages described above of the prior art, the present invention attempts to carry out existing T.38 gateway
Improve to improve the success rate T.38 called between different T.38 gateways.
The invention provides a kind of at the net that transmission facsimile machine and reception facsimile machine are connected to IP network
Shutting the method processing G3 Fax calling, the method includes: send receiving reception facsimile machine
Digital identification signal DIS time, whether check the error correction mode ECM position in this digital identification signal
It is set；And, in the case of described ECM position is set, remove described ECM position,
So that by sending the digital identification signal DIS non-ECM of initiation that facsimile machine is eliminated based on ECM position
Facsimile call.
In an embodiment of the present invention, described gateway includes the transmission gateway connecting described transmission facsimile machine
With the reception gateway of the described reception facsimile machine of connection, described transmission gateway or reception gateway perform
State inspection and remove step.
The invention provides a kind of gateway processing G3 Fax calling, transmission is faxed by described gateway
Machine and reception facsimile machine are connected to IP network, and this gateway includes: check module, for receiving
When receiving the digital identification signal DIS that facsimile machine sends, check the error correction mode in this digital identification signal
ECM position is set the most；And, remove module, for be set in described ECM position
In the case of, remove described ECM position, in order to by sending the number that facsimile machine is eliminated based on ECM position
Word id signal DIS initiates non-ECM facsimile call.
In an embodiment of the present invention, the gateway processing G3 Fax calling farther includes to connect institute
State and send sending gateway and connecting the reception gateway of described reception facsimile machine, described transmission net of facsimile machine
Close or receive gateway include above-mentioned inspection module and remove module.
Present invention also offers a kind of by send facsimile machine and receive facsimile machine be connected to IP network
The method processing G3 Fax calling on gateway, the method includes: send out receiving transmission facsimile machine
During the digital command signal DCS sent, check that ECM position is set the most；In ECM position by
In the case of setting, the Frame Check Sequence FCS of DCS signal is set to mistake；Receiving
Receive that facsimile machine sends in response to comprising the digital identification signal DIS of DCS signal that FCS is mistake
Time, check that the ECM position in this digital identification signal DIS is set the most；And, described
In the case of ECM position is set, remove described ECM position, in order to by send facsimile machine based on
The digital identification signal DIS that ECM position is eliminated initiates non-ECM facsimile call.
According to embodiments of the invention, described gateway includes the transmission gateway connecting described transmission facsimile machine
With the reception gateway connecting described reception facsimile machine.
According to a preferred embodiment of the invention, send gateway and receive the numeral sending facsimile machine transmission
During command signal DCS, check what ECM position had the most been set and had been set in ECM position
In the case of, the Frame Check Sequence FCS of DCS signal is set to mistake.
According to a preferred embodiment of the invention, receive gateway and receive the numeral sending facsimile machine transmission
During command signal DCS, check what ECM position had the most been set and had been set in ECM position
In the case of, the Frame Check Sequence FCS of DCS signal is set to mistake.
According to a preferred embodiment of the invention, described transmission gateway is receiving what reception facsimile machine sent
During in response to the digital identification signal DIS of DCS, check the ECM in this digital identification signal DIS
Position is set the most；In the case of described ECM position is set, remove described ECM position
So that by sending the digital identification signal DIS non-ECM of initiation that facsimile machine is eliminated based on ECM position
Facsimile call.
According to a preferred embodiment of the invention, described reception gateway is receiving what reception facsimile machine sent
In response to when comprising the digital identification signal DIS of DCS signal that FCS is mistake, check this numeral
ECM position in id signal DIS is set the most；And be set in described ECM position
In the case of, remove described ECM position, in order to by sending what facsimile machine was eliminated based on ECM position
Digital identification signal DIS initiates non-ECM facsimile call.
According to a preferred embodiment of the invention, the Frame Check Sequence FCS of DCS signal is set to mistake
Include by mistake so that FCS check bit be unsuccessfully FCS-BAD or with random value change FCS verify sequence
Row.
Another aspect of the present invention provides a kind of gateway processing G3 Fax calling, and described gateway will
Sending facsimile machine and reception facsimile machine is connected to IP network, described gateway includes: DCS signal check
Module, for when receiving the digital command signal DCS sending facsimile machine transmission, checking ECM
Position is set the most；FCS arranges module, in the case of ECM position is set, by DCS
The Frame Check Sequence FCS of signal is set to mistake；DIS signal check module, for receiving
Receive that facsimile machine sends in response to the digital identification signal DIS of DCS time, check that this Digital ID is believed
ECM position in number DIS is set the most；And, remove module, at described ECM
In the case of position is set, remove described ECM position, in order to by sending facsimile machine based on ECM position
The digital identification signal DIS being eliminated initiates non-ECM facsimile call.
According to a preferred embodiment of the invention, described gateway includes the transmission connecting described transmission facsimile machine
Gateway and the reception gateway of the described reception facsimile machine of connection.
According to a preferred embodiment of the invention, described transmission gateway or described reception gateway include DCS
Signal check module and FCS arrange module, and, described reception gateway or described transmission gateway include
DIS signal check module and removing module.
According to a preferred embodiment of the invention, described FCS arranges module and is configured such that FCS school
Test position be unsuccessfully FCS-BAD or with random value change FCS verification sequence.
The present invention sending facsimile machine (caller G3FE) and can receive facsimile machine (called G3FE)
All support ECM mode but access in the case of one of gateway correctly can not support ECM, open
Begin to start T.38 to call with non-ECM mode regularly between two T.38 gateway.
The present invention can improve the success rate T.38 called between different T.38 gateways, particularly
In the case of the gateway of different equipment suppliers is mutual.The mechanism of the present invention can use non-ECM
Pattern automatically transmit fax page data and without manual intervention.
Accompanying drawing explanation
The exemplary embodiment of the present invention is described below with reference to accompanying drawings.Should be appreciated that the following drawings and
Embodiment for the purpose of the ultimate principle explaining the present invention, is not to scope completely
Restriction, wherein:
Fig. 1 a is the structural representation of T.38 grid real-time fax system in prior art；
Fig. 1 b is that DIS frame of the prior art cannot be intervened at voice state arrival transmission facsimile machine gateway
Schematic flow sheet；
Fig. 2 is in an embodiment of the present invention, and T.38 gateway is to the DIS in the processing method of standard frame
Structural representation with DCS frame；
Fig. 3 is to illustrate the flow chart according to the first embodiment of the present invention；
Fig. 4 is to illustrate flow chart according to the second embodiment of the present invention；
Fig. 5 is to illustrate flow chart according to the third embodiment of the invention；
Fig. 6 is to illustrate flow chart according to the fourth embodiment of the invention；
Fig. 7 illustrates the functional schematic of T.38 gateway according to embodiments of the present invention；And
Fig. 8 illustrates the functional schematic of T.38 gateway according to embodiments of the present invention.
Detailed description of the invention
Referring now to accompanying drawing, various exemplary embodiment can be described more fully with, it should be pointed out that,
Ad hoc structure disclosed herein and function detail are only for describing exemplary embodiment.Described exemplary enforcement
Example can be embodied by many alterative version and can not be considered limited to embodiment described here.
As shown in Figure 1a, typical G3 facsimile terminal and a gateway are connected, and then, pass through
IP network is by facisimile transmission to purpose gateway, and purpose gateway sends faxes over the PSTN to meet again
On the facsimile machine of G3.Once the call setup of PSTN gets up, and the G3 terminal at two ends just establishes
Logic connects.
Fig. 3 shows the message flow chart according to the first embodiment of the present invention.In this embodiment,
Send facsimile machine and receive the ECM mode that facsimile machine is all supported T.38 to call, therefore, receiving fax
ECM position (that is, the knot of DIS frame shown in Fig. 2 in the V.21DIS HDLC signal that machine sends
Bit 27 in structure) should be set.
V.21DIS reception gateway, already at T.38 pattern, is received from TDM side joint when receiving gateway
During HDLC signal, receive gateway and inspection ECM position has been set that (the i.e. the 27th bit is
No is " 1 "), as shown at step 307.In the case of ECM position is set, in step 308
In, remove ECM position, " 0 " will be become by the 27th bit.Will amendment it follows that receive gateway
After V.21DIS HDLC signal be packed into IFP and be grouped and send them to IP network, i.e. walk
Rapid 309.
In follow-up step 310, send gateway and be V.21IFP grouped from IP network reception, do not repair
Change any value in DIS, simply they are modulated into V.21DIS HDLC signal they being sent out
Deliver to TDM side.Send facsimile machine and receive the DIS signal that ECM position is eliminated, then with V.21
DCS HDLC signal responds, as indicated at 311.The T.30 sequence sent should be with non-ECM
T.30 the agreement of pattern is consistent.Finally, send facsimile machine and receive facsimile machine use non-ECM mode
Start T.38 to call.
Fig. 4 shows message flow chart according to the second embodiment of the present invention.In this embodiment,
Send facsimile machine and receive the ECM mode that facsimile machine is all supported T.38 to call, therefore, receiving fax
ECM position (that is, the knot of DIS frame shown in Fig. 2 in the V.21DIS HDLC signal that machine sends
Bit 27 in structure) should be set.
Reception gateway is already at T.38 pattern, and therefore it receives V.21DIS HDLC from TDM side joint
During signal, but receive gateway and do not remove ECM position, and simply by V.21DIS HDLC signal
It is packed into IFP be grouped and send them to IP network, as shown in step 402.
In step 407, send gateway and be V.21IFP grouped from IP network reception, check this DIS
ECM position in signal is set the most.In the case of ECM position is set, such as step
Shown in 408, remove the ECM position in DIS signal, i.e. bit 27 is set to " 0 ".Connect
And send gateway the V.21IFP packet of amendment is modulated into V.21DIS HDLC signal by them
It is sent to TDM side, i.e. step 409.
In subsequent steps, send facsimile machine and receive the DIS signal that ECM position is eliminated, then
Responding with V.21DCS HDLC signal, this signal only uses non-ECM mode, such as step 410
Shown in.The T.30 sequence sent is consistent with the T.30 agreement of non-ECM mode.Finally, biography is sent
Prototype and reception facsimile machine use non-ECM mode to start T.38 to call.
Fig. 5 shows message flow chart according to the third embodiment of the invention.In this embodiment,
Send facsimile machine (i.e. caller G3 facsimile equipment) and receive facsimile machine (the most called G3 facsimile equipment)
All support the ECM mode T.38 called, therefore, receive the V.21DIS HDLC that facsimile machine sends
ECM position (the 27th bit) in signal should be set.Receive gateway and be not in T.38 mould
Formula, therefore it receives V.21DIS HDLC signal from TDM side joint, but the most pellucidly
Transmit.Receive gateway and do not revise any value in DIS signal, and send them to IP network.
Sending gateway and receive the V.21DIS HDLC signal of speech pattern, that does not the most revise in DIS is any
They are then sent transparently through TDM side by value.This part is in the voice status stage of Fig. 5
Briefly show, owing to the purport with the present invention is unrelated, be no longer described in detail, in order to avoid obscuring this
Bright.
Send facsimile machine and receive the DIS signal being provided with ECM position, then with V.21DCS HDLC
Signal responds, and this signal uses ECM mode.This process step 501 in Figure 5 illustrates.
As shown at step 502, transmission gateway is already at T.38 pattern, and it is received from TDM side joint
V.21DCS HDLC signal, ECM position to be determined is set the most.In step 503,
If the 27th bit in ECM position, i.e. Fig. 2, it is set, no matter the FCS of DCS signal
Verification is success or failure, and sends gateway and makes FCS verification be set to mistake forcibly.Real at this
Execute in example so that FCS check bit is FCS-BAD.
Send gateway and amended V.21DCS HDLC signal is packed into IFP packet and by it
Be sent to IP network, as indicated in step 504.Reception gateway is already at T.38 pattern, therefore
It receives from IP network and is V.21IFP grouped, and does not revise any value in DCS, only they is adjusted
Make V.21DCS HDLC signal send them to TDM side, as shown in step 505.
Receive facsimile machine and receive the DCS signal that FCS verification sequence is mistake, and again with V.21DIS
Signal responds, and in V.21DIS signal, error correction bit (bit 27) is also set, this
Process illustrates in step 506.
Next start to send facsimile machine and receive and renegotiate process between facsimile machine, step afterwards
Rapid 507,508 with 509 with the step 307 in first embodiment, 308,309 similar.Specifically,
In step 507, receive gateway and inspection ECM position has been set that (the i.e. the 27th bit is
No is " 1 ").In the case of ECM position is set, remove ECM position in step 508,
" 0 " will be become by 27th bit.Receive gateway to be packed by amended V.21DIS HDLC signal
Enter IFP be grouped and send them to IP network, i.e. step 509.Finally send facsimile machine and connect
Receive facsimile machine to start T.38 to call with non-ECM mode.
In the variant of third embodiment of the invention, reception gateway, can not after performing step 506
DIS signal is processed, but transfers to send gateway and perform this processing procedure, i.e. send gateway and hold
Row step 507 and 508.On the premise of understanding basic thought of the present invention, for people in the art
For Yuan, implement such variant and there is not special difficulty.
Fig. 6 shows message flow chart according to the fourth embodiment of the invention.In this embodiment,
Send facsimile machine and receive the ECM mode that facsimile machine is all supported T.38 to call, therefore, receiving fax
ECM position (i.e. the 27th bit in Fig. 2) in the V.21DIS HDLC signal that machine sends should
When being set.Receiving gateway and be not in T.38 pattern, it receives V.21DIS HDLC from TDM side joint
Signal, but transmit the most pellucidly；Receive gateway and do not revise any value in DIS signal,
And send them to IP network；Send gateway and receive the V.21DIS HDLC signal of speech pattern,
The most do not revise any value in DIS, then they are sent transparently through TDM side.This part
Briefly show in the voice status stage of Fig. 6, owing to the purport with the present invention is unrelated, no longer carry out in detail
Thin description, in order to avoid obscuring the present invention.
Send facsimile machine and receive the DIS signal being provided with ECM position, then with V.21DCS HDLC
Signal responds, and this signal uses ECM mode, as shown in step 601.Send gateway already at
T.38 pattern, it receives V.21DCS HDLC signal from TDM side joint, but it does not revise DCS
In any value, therefore send gateway they are packed into IFP packet, be sent next to IP network,
Such as step 601 ' shown in.
Reception gateway is already at T.38 pattern, and in step 602, V.21 it receive from IP network
DCS IFP is grouped and determines that ECM position has been set.If ECM position, the i.e. the 27
Bit is set, and no matter the FCS verification of DCS signal is success or failure, in step 603
In, forcibly change FCS verification sequence with random value.After step 603, receiving gateway will repair
The V.21IFP packet changed is modulated into V.21DCS HDLC signal send them to TDM
Side.
Receiving facsimile machine and receiving FCS check bit is wrong DCS signal, the most in step 604,
Again responding with V.21DIS signal, in V.21DIS signal, ECM position is also to arrange.From
At this moment rise, start send facsimile machine and receive renegotiating between facsimile machine, negotiations process afterwards
Also identical with the process in first embodiment.Specifically, in step 607, receiving gateway will inspection
Look into ECM position has been set (whether the i.e. the 27th bit is " 1 ").In ECM position
In the case of being set, remove ECM position in step 608, " 0 " will be become by the 27th bit.
Receive gateway amended V.21DIS HDLC signal is packed into IFP packet and they is sent
To IP network, i.e. step 609.The final facsimile machine that sends is opened with non-ECM mode with reception facsimile machine
Begin T.38 to call.
In variant according to a fourth embodiment of the present invention, reception gateway, can after performing step 604
DIS signal is not processed, but transfer to send gateway and perform this processing procedure, i.e. send net
Close and perform step 607 and 608.On the premise of understanding basic thought of the present invention, for this area skill
For art personnel, implement such variant and the most there is not special difficulty.
Fig. 7 illustrates the functional schematic of the most T.38 gateway.In order to realize example
G3 Fax call handling process as described by first and second embodiments of the present invention, according to this
The gateway device of invention typically comprises inspection module 707 and removes module 708.
In the example of a gateway device of the present invention, receive gateway already at T.38 pattern, when
Receive gateway from TDM side joint receive V.21DIS HDLC signal time, receive gateway inspection module
Inspection ECM position has been set (whether the i.e. the 27th bit is " 1 ") by 707.At ECM
In the case of position is set, is removed ECM position by removing module 708, will become by the 27th bit
“0”.Receive gateway (specifically, the most existing transporter) by amended V.21DIS
HDLC signal is packed into IFP and is grouped and sends them to IP network.
In another embodiment of the gateway device according to the present invention, such as, gateway is sent from IP network
Network receives and is V.21IFP grouped, and checks that module 707 has checked the ECM position in this DIS signal the most
It is set.In the case of ECM position is set, removed in DIS signal by removing module 708
ECM position, i.e. bit 27 is set to " 0 ".Then gateway is sent by amendment V.21IFP
Packet is modulated into V.21DIS HDLC signal send them to TDM side.
Fig. 8 illustrates the functional schematic of T.38 gateway according to other embodiments of the invention.For reality
The G3 Fax call handling process described by third and fourth embodiment of the most such as present invention, root
Typically comprise DCS signal check module 802 according to the gateway device of the present invention, for receive send out
During the digital command signal DCS that sending fax machine sends, check that ECM position is set the most；FCS
Module 803 is set, in the case of ECM position is set, by the Frame Check Sequence of DCS signal
FCS is set to mistake；DIS signal check module 807, for receiving reception facsimile machine transmission
In response to the digital identification signal DIS of DCS time, check the ECM in this digital identification signal DIS
Position is set the most；Remove module 808, be used in the case of described ECM position is set,
Remove described ECM position；Afterwards, the digital identification signal DIS that ECM position is eliminated will be transmitted to
Send facsimile machine, in order to by the facsimile call sending the facsimile machine non-ECM of initiation.
Module 707 and 708 in DIS signal check module 807 and removing module 808 and Fig. 7
Function is similar to, and here is omitted.
It should be noted that return to Fig. 5, transmission gateway is already at T.38 pattern, if sending net
Close and receive V.21DCS HDLC signal from TDM side joint, as usual they are packed into IFP
It is grouped and is sent to IP network.But before this, send the DCS signal check module 802 of gateway
Need to check the ECM position in DCS signal, the i.e. the 27th bit.If this bit is set, nothing
To the inspection result of V.21DCS HDLC signal how, FCS arranges module the last 803 to opinion FCS
Making FCS check bit to system is HDLC-FCS-Bad.
Afterwards, module 807 and 808 continue executing with DIS signal check, ECM mode removes merit
Energy.
Return to Fig. 6, if receiving gateway to receive V.21DCS IFP packet from IP network, as habitually in the past
Equally they are modulated into V.21DCS HDLC signal be sent to TDM side.But this it
Before, the DCS signal check module 802 receiving gateway has to check for the ECM position in DCS signal.
If this bit is set, no matter it is HDLC-FCS-Ok or HDLC-FCS-Bad, FCS
Module 803 is set and changes FCS Frame Check Sequence with random value forcibly, so that receiving on facsimile machine
FCS verify unsuccessfully.Afterwards, module 807 and 808 DIS signal check, ECM are continued executing with
The functions such as pattern removing.
In fig. 8, module 802,803 is positioned on transmission gateway, and module 807 and 808 is positioned at reception
On gateway.It should be noted that other combinations are also feasible, such as, these five modules are all located at
Send gateway or receive on gateway, or, module 802,803 is positioned on reception gateway, module
807 and 808 are positioned on transmission gateway.
It is pointed out that be previously mentioned in the present invention receives gateway and send the concept of gateway simply
Making a distinction from logic function, they can be in the standalone gateway equipment of diverse location, also
Can be reception side and the sending side of same gateway device, they may belong to the gateway of same producer and set
Standby can also be different manufacturers.It addition, it should be readily apparent to one skilled in the art that typical T.38 net
Close the functional unit, element or the module that include and be far above Fig. 7, in 8 and described in related embodiment
These, in order to make description of the invention clear, description eliminates portion unrelated to the invention
Point.It addition, for the present invention, the term " caller G3 facsimile machine " in literary composition and " transmission fax
Machine " and " called G3 facsimile machine " and " reception facsimile machine " be respectively provided with identical implication.
All various elements shown in accompanying drawing or described here can be implemented as hardware, software, consolidate
Part or their certain combination.
It will be appreciated by those skilled in the art that the description carried out above by reference to accompanying drawing is all illustrative,
Rather than limiting the scope of the present invention.In the spirit and scope of the present invention being defined by the claims
In, those skilled in the art are devised by various amendment and variant.
Claims (11)
1. one kind will send facsimile machine and is receiving facsimile machine and be connected on the gateway of IP network process the
The method of G3 Fax calling, the method includes:
When receiving the digital command signal DCS sending facsimile machine transmission, whether check ECM position
It is set；
In the case of ECM position is set, the Frame Check Sequence FCS of DCS signal is arranged
For mistake；
Receive receive that facsimile machine sends in response to comprising the number of DCS signal that FCS is mistake
During word id signal DIS, check that the ECM position in this digital identification signal DIS is set the most；
And
In the case of described ECM position is set, remove described ECM position, in order to by sending
The digital identification signal DIS that facsimile machine is eliminated based on ECM position initiates non-ECM facsimile call.
2. the method for claim 1, described gateway includes connecting sending out of described transmission facsimile machine
Send gateway and connect the reception gateway of described reception facsimile machine.
3. method as claimed in claim 2, wherein, described transmission gateway is receiving transmission fax
During the digital command signal DCS that machine sends, check that ECM position has been set and the most at ECM
In the case of position is set, the Frame Check Sequence FCS of DCS signal is set to mistake.
4. method as claimed in claim 2, wherein, described reception gateway is receiving transmission fax
During the digital command signal DCS that machine sends, check that ECM position has been set and the most at ECM
In the case of position is set, the Frame Check Sequence FCS of DCS signal is set to mistake.
5. the method as described in claim 3 or 4, described transmission gateway is receiving reception facsimile machine
Send in response to the digital identification signal DIS of DCS time, check in this digital identification signal DIS
ECM position be the most set；In the case of described ECM position is set, remove described
ECM position, in order to by sending the digital identification signal DIS initiation that facsimile machine is eliminated based on ECM position
Non-ECM facsimile call.
6. the method as described in claim 3 or 4, described reception gateway is receiving reception facsimile machine
Send in response to when comprising the digital identification signal DIS of DCS signal that FCS is mistake, check
ECM position in this digital identification signal DIS is set the most；Set in described ECM position
In the case of putting, remove described ECM position, in order to be eliminated based on ECM position by sending facsimile machine
Digital identification signal DIS initiate non-ECM facsimile call.
7. the method as described in any one of claims 1 to 3, wherein, by the frame school of DCS signal
Test sequence FCS be set to mistake include so that FCS check bit be unsuccessfully FCS-BAD or with
Machine value changes FCS verification sequence.
8. processing a gateway for G3 Fax calling, described gateway will send facsimile machine and pass with receiving
Prototype is connected to IP network, and described gateway includes:
DCS signal check module, for receiving the digital command signal sending facsimile machine transmission
During DCS, check that ECM position is set the most；
FCS arranges module, in the case of ECM position is set, by the frame check of DCS signal
Sequence FCS is set to mistake；
DIS signal check module, for receive receive facsimile machine send in response to comprising FCS
During for the digital identification signal DIS of DCS of mistake, check the ECM in this digital identification signal DIS
Position is set the most；And
Remove module, in the case of described ECM position is set, remove described ECM position,
So that by sending the digital identification signal DIS non-ECM of initiation that facsimile machine is eliminated based on ECM position
Facsimile call.
9. gateway as claimed in claim 8, described gateway includes connecting sending out of described transmission facsimile machine
Send gateway and connect the reception gateway of described reception facsimile machine.
10. gateway as claimed in claim 9, wherein, described transmission gateway or described reception gateway
Including DCS signal check module and FCS, module is set, and, described reception gateway or described
Gateway is sent to include DIS signal check module and remove module.
11. gateways as described in any one of claim 8 to 10, wherein, described FCS arranges mould
Block be configured such that FCS check bit be unsuccessfully FCS-BAD or with random value change FCS school
Test sequence.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210268587.5A CN103581495B (en) | 2012-07-31 | 2012-07-31 | Process method and the gateway device of facsimile call |
| PCT/IB2013/001760 WO2014020433A1 (en) | 2012-07-31 | 2013-07-22 | Method and gateway device for processing a fax call |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210268587.5A CN103581495B (en) | 2012-07-31 | 2012-07-31 | Process method and the gateway device of facsimile call |
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| CN103581495B true CN103581495B (en) | 2016-08-10 |
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| CN110958359B (en) * | 2019-11-01 | 2021-08-06 | 深圳震有科技股份有限公司 | High-delay fax method, intelligent terminal and storage medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1517496A1 (en) * | 2003-09-19 | 2005-03-23 | Ricoh Company, Ltd. | Gateway apparatus, network terminal apparatus and communication method |
| CN1816006A (en) * | 2005-02-03 | 2006-08-09 | 华为技术有限公司 | Method for treating non-standard frame by T.38 network gate |
| CN101448060A (en) * | 2008-12-23 | 2009-06-03 | 中兴通讯股份有限公司 | Method and system for prohibiting error correction mode during IP faxing |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4998903B2 (en) * | 2009-11-30 | 2012-08-15 | Ｎｅｃフィールディング株式会社 | Facsimile relay device, relay method, and program |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1517496A1 (en) * | 2003-09-19 | 2005-03-23 | Ricoh Company, Ltd. | Gateway apparatus, network terminal apparatus and communication method |
| CN1816006A (en) * | 2005-02-03 | 2006-08-09 | 华为技术有限公司 | Method for treating non-standard frame by T.38 network gate |
| CN101448060A (en) * | 2008-12-23 | 2009-06-03 | 中兴通讯股份有限公司 | Method and system for prohibiting error correction mode during IP faxing |
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