CN105245352B - A kind of intelligent public phone realization system and method based on SIP voice home gateways - Google Patents
A kind of intelligent public phone realization system and method based on SIP voice home gateways Download PDFInfo
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- CN105245352B CN105245352B CN201510566161.1A CN201510566161A CN105245352B CN 105245352 B CN105245352 B CN 105245352B CN 201510566161 A CN201510566161 A CN 201510566161A CN 105245352 B CN105245352 B CN 105245352B
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Abstract
The invention discloses a kind of, and the intelligent public phone based on SIP voice home gateways realizes system and method, is related to SIP voice home gateways field.The system includes home gateway, and intelligent public phone processing module is provided on the voice module of home gateway；When the system realizes intelligent public phone, intelligent public phone is established with intelligent public phone platform and is called；The intelligent public phone that user uses and callee's normal talking, intelligent public phone platform start charging；After user carries out on-hook operation, intelligent public phone processing module terminates to converse to intelligent public phone platform request；Intelligent public phone platform stops charging and generates bill；Intelligent public phone simulates off-hook, issues bill to intelligent public phone platform request, bill is sent to intelligent public phone by intelligent public phone platform；Intelligent public phone simulates on-hook after receiving bill, and completion is taken under intelligent public phone.The present invention can significantly improve the success rate that the bill of Intelligent Pay Phone Service once takes down, improve user experience, be used convenient for people.
Description
Technical field
The present invention relates to SIP (Session Initiation Protocol, session initiation protocol) voice home gateway necks
A kind of domain, and in particular to intelligent public phone realization system and method based on SIP voice home gateways.
Background technology
Intelligent access device of the home gateway towards domestic consumer, small retail shop, small enterprise, home gateway have broadband and connect
Enter, business identification, control information forwarding etc. functions, home gateway can provide simultaneously online, IPTV (Interactive Internet TV),
The business such as WIFI, phone, monitoring.At the same time, home gateway can also converge the Media Stream in home network, and bear
Blame user from public network for the access of home network and control, can be simultaneously.
With the development of home gateway, many telecom operators' (such as China Telecom etc.) are opened by home gateway voice mouth
Intelligent Pay Phone Service is opened up, and then reduces cost.Currently, the communication process of intelligent public phone is controlled by end office (EO)：After calling subscribe's on-hook,
The on-hook signal reported is converted to CCL (Calling party clear signal, Calling party CLear signal) letters by end office (EO)
Number it is sent to intelligent platform, intelligent platform issues call release after rate, end of conversation.
But in IMS (IP Multimedia Subsystem, IP multimedia subsystem) network, due to not corresponding to
The signal reportings such as dislodging machine, therefore intelligent public phone communication process is by home gateway and end office's co- controlling, i.e., after user's on-hook,
Called subscriber is sent to by home gateway generation BYE (end) message and discharges call resource, end of conversation.Based on SIP languages
In the home gateway of sound, after end of conversation (on-hook), home gateway can terminate Media Stream while sending BYE message；Therefore,
After intelligent public phone simulates off-hook, without corresponding media channel for issuing expense, and then the primary expense that issues fails, and needs to send out
It rises and takes under second of call request, reduce intelligent public phone rate issues efficiency, is not easy to people's use.
Invention content
In view of the deficiencies in the prior art, the purpose of the present invention is to provide one kind being based on SIP voice home gateways
Intelligent public phone realize system and method.The present invention can significantly improve the bill of Intelligent Pay Phone Service once it is lower take at
Power improves user experience, is used convenient for people.
To achieve the above objectives, the intelligent public phone provided by the invention based on SIP voice home gateways realizes system, including
Home gateway for the IMS voice servers for connecting intelligent public phone and IMS network, home gateway includes voice module, described
Intelligent public phone processing module is provided on voice module；
When the system realizes intelligent public phone, intelligent public phone that user uses by the IMS voice servers of IMS network with
Intelligent public phone platform establishes calling；Intelligent public phone and intelligent public phone platform shake hands successfully and intelligent public phone processing module determine with
Corresponding handshaking information is intelligent public phone and the callee's normal talking that user uses after Intelligent Pay Phone Service, and intelligent public phone is flat
Platform starts charging；
After user carries out on-hook operation to intelligent public phone, intelligent public phone processing module terminates to lead to intelligent public phone platform request
Words；Intelligent public phone platform stops charging and generates bill；Intelligent public phone simulates off-hook, under intelligent public phone platform request
Bill is sent out, bill is sent to intelligent public phone by intelligent public phone platform by frequency shift keying fsk；Intelligent public phone receives words
After taking bill, intelligent public phone simulates on-hook, takes completion under intelligent public phone.
Based on the above technical solution, the system during media control and realize scene when realizing intelligent public phone：
The intelligent public phone that user uses is established by signaling and intelligent public phone platform and is called；Intelligent public phone platform is to intelligent public affairs
Words issue answer signal with charge, and intelligent public phone is to intelligent public phone platform to responding answer signal；Intelligent public phone processing module detects
It is touch-tone signal dtmf signal C to answer signal with charge, response answer signal is dtmf signal A, is determined as intelligent public phone
Business, the intelligent public phone that user uses and callee's normal talking, intelligent public phone platform start charging；
After user carries out on-hook operation to intelligent public phone, intelligent public phone processing module keeps Media Stream while generating concurrent
Send BYE message to intelligent public phone platform；After intelligent public phone platform receives BYE message, stop charging, generates bill；Intelligence
Payphone simulates off-hook, sends voice signal to intelligent public phone platform, request issues bill；Intelligent public phone platform passes through frequency displacement
Bill is sent to intelligent public phone by keying FSK；After intelligent public phone receives bill, intelligent public phone is to intelligent public phone platform
It responds audible signal reception to complete, request terminates call, and intelligent public phone processing module discharges resource, terminates Media Stream；Intelligence is public
Words simulate on-hook, take completion under intelligent public phone.
Based on the above technical solution, the system during signaling controls and realizes scene when realizing intelligent public phone：
The intelligent public phone that user uses sends invite message to intelligent public phone platform, and intelligent public phone platform is to intelligent public phone
Respond 200OK message；Intelligent public phone processing module detects carrying called-control fields in 200OK message, is determined as
Intelligent Pay Phone Service, the intelligent public phone that user uses and callee's normal talking, intelligent public phone platform start charging；
After user carries out on-hook operation to intelligent public phone, intelligent public phone processing module is suspended Media Stream while being generated concurrent
Send the invite message for carrying user-suspended fields to intelligent public phone platform, intelligent public phone platform, which receives, carries user-
After the invite message of suspended fields, stop charging, generates bill；
Intelligent public phone simulates off-hook, and intelligent public phone processing module is restored Media Stream and sent again to intelligent public phone platform
The invite message of user-suspended fields is carried, request issues bill；Intelligent public phone platform is by FSK by telephone expenses
Bill is sent to intelligent public phone；
After intelligent public phone receives bill, intelligent public phone platform requires to terminate call, intelligence to intelligent public phone processing module
It can payphone processing module release resource；Intelligent public phone simulates on-hook, takes completion under intelligent public phone.
Provided by the present invention for the intelligent public phone implementation method based on SIP voice home gateways of above system, including
Following steps：
S1：The intelligent public phone that user uses is exhaled by the IMS voice servers of IMS network with the foundation of intelligent public phone platform
It cries；Intelligent public phone and intelligent public phone platform are shaken hands successfully and intelligent public phone processing module determines that corresponding with handshaking information is intelligence
After energy general phone service, intelligent public phone and the callee's normal talking that user uses, intelligent public phone platform start charging, go to S2；
S2：After user carries out on-hook operation to intelligent public phone, intelligent public phone processing module is to intelligent public phone platform request knot
Beam is conversed；Intelligent public phone platform stops charging and generates bill, goes to S3；
S3：Intelligent public phone simulates off-hook, issues bill to intelligent public phone platform request, intelligent public phone platform passes through frequency
It moves keying FSK and bill is sent to intelligent public phone, go to S4；
S4：After intelligent public phone receives bill, intelligent public phone simulates on-hook, takes completion under intelligent public phone, terminates.
Based on the above technical solution, S4 is further comprising the steps of：If intelligent public phone does not receive bill, extend
The time of expense is issued to 20 seconds or more, is being issued in cost-time, intelligent public phone asks to issue again to intelligent public phone platform
Bill, request intelligent public phone platform send current bill.
Based on the above technical solution, when the intelligent public phone implementation method is applied to media control realization scene,
Specifically include following steps：
S1：The intelligent public phone that user uses is established by signaling and intelligent public phone platform and is called；Intelligent public phone platform is to intelligence
Can payphone issue answer signal with charge, intelligent public phone is to intelligent public phone platform to responding answer signal；Intelligent public phone processing module
Detect that answer signal with charge is touch-tone signal dtmf signal C, response answer signal is dtmf signal A, is determined as intelligence
General phone service, the intelligent public phone that user uses and callee's normal talking, intelligent public phone platform start charging, go to S2；
S2：After user carries out on-hook operation to intelligent public phone, intelligent public phone processing module keeps Media Stream while generating simultaneously
BYE message is sent to intelligent public phone platform；After intelligent public phone platform receives BYE message, stop charging, generate bill, turns
To S3；
S3：Intelligent public phone simulates off-hook, sends voice signal to intelligent public phone platform, request issues bill；Intelligence
Bill is sent to intelligent public phone by payphone platform by frequency shift keying fsk, goes to S4；
S4：After intelligent public phone receives bill, intelligent public phone is responded audible signal reception to intelligent public phone platform and is completed,
Request terminates call, and intelligent public phone processing module discharges resource, terminates Media Stream；Intelligent public phone simulates on-hook, under intelligent public phone
Take completion, terminates.
Based on the above technical solution, intelligent public phone simulates on-hook in S4, takes completion under intelligent public phone, specifically includes
Following steps：Intelligent public phone processing module checks whether resource discharges, if so, taking completion under intelligent public phone, terminates；Otherwise it discharges
Resource takes completion under intelligent public phone, terminates.
Based on the above technical solution, when the intelligent public phone implementation method is applied to signaling control realization scene,
Specifically include following steps：
S1：The intelligent public phone that user uses sends invite message to intelligent public phone platform, and intelligent public phone platform is to intelligence
Payphone responds 200OK message；Intelligent public phone processing module detects carrying called-control fields in 200OK message, really
It is set to Intelligent Pay Phone Service, the intelligent public phone that user uses and callee's normal talking, intelligent public phone platform start charging, go to
S2；
S2：After user carries out on-hook operation to intelligent public phone, intelligent public phone processing module is suspended Media Stream while being generated simultaneously
The invite message for carrying user-suspended fields is sent to intelligent public phone platform, intelligent public phone platform receives carrying
After the invite message of user-suspended fields, stop charging, generates bill, go to S3；
S3：Intelligent public phone simulates off-hook, and intelligent public phone processing module is restored Media Stream and sent out again to intelligent public phone platform
The invite message for carrying user-suspended fields, request is sent to issue bill；Intelligent public phone platform will be talked about by FSK
Expense bill is sent to intelligent public phone, goes to S4；
S4：After intelligent public phone receives bill, intelligent public phone platform requires to terminate call to intelligent public phone processing module,
Intelligent public phone processing module discharges resource；Intelligent public phone simulates on-hook, takes completion under intelligent public phone, terminates.
Based on the above technical solution, intelligent public phone simulates on-hook in S4, takes completion under intelligent public phone, specifically includes
Following steps：Intelligent public phone processing module checks whether resource discharges, if so, taking completion under intelligent public phone, terminates；Otherwise it discharges
Resource takes completion under intelligent public phone, terminates.
Compared with the prior art, the advantages of the present invention are as follows：
The present invention increases intelligence on the basis of analyzing Intelligent Pay Phone Service flow in SIP voice home gateways
Payphone processing module.Intelligent public phone processing module can not only detect the dtmf signal in call and the head in SIP signalings
Domain determines Intelligent Pay Phone Service, and can simulate off-hook and on-hook after user's on-hook, continues to carry out with intelligent public phone platform
Interaction ensures issuing for bill successively.Therefore, invention significantly improves the bill of Intelligent Pay Phone Service it is primary under
The success rate taken, improves user experience, is used convenient for people.
Description of the drawings
Fig. 1 is the connection block diagram that the intelligent public phone based on SIP voice home gateways realizes system in the embodiment of the present invention；
Fig. 2 a are that the intelligent public phone implementation method based on SIP voice home gateways is applied to media control in the embodiment of the present invention
System realizes the sequence diagram of scene；
Fig. 2 b are that the intelligent public phone implementation method based on SIP voice home gateways is applied to media control in the embodiment of the present invention
System realizes the flow chart of scene；
Fig. 3 a are that the intelligent public phone implementation method based on SIP voice home gateways is applied to signaling control in the embodiment of the present invention
System realizes the sequence diagram of scene；
Fig. 3 b are that the intelligent public phone implementation method based on SIP voice home gateways is applied to signaling control in the embodiment of the present invention
System realizes the flow chart of scene.
Specific implementation mode
Invention is further described in detail with reference to the accompanying drawings and embodiments.
Shown in Figure 1, the intelligent public phone based on SIP voice home gateways in the embodiment of the present invention realizes system, packet
Include the IMS voice servers and intelligent public phone platform of intelligent public phone, home gateway and IMS network.Intelligent public phone and home network
Powered-down to be connected, home gateway includes voice module, and intelligent public phone processing module is provided on voice module, and voice module passes through
IMS voice servers are connected with intelligent public phone platform.
The intelligent public phone implementation method based on SIP voice home gateways for above system in the embodiment of the present invention,
Include the following steps：
S1：The intelligent public phone that user uses is established with intelligent public phone platform by the IMS voice servers of IMS network and is called
(i.e. user's off-hook dials, closing of the circuit)；Intelligent public phone is shaken hands successfully with intelligent public phone platform and intelligent public phone processing module is true
It is fixed corresponding with handshaking information for intelligent public phone and callee's normal talking that after Intelligent Pay Phone Service, user uses, intelligence public affairs
Words platform starts charging, goes to S2.
S2：After user carries out on-hook operation to intelligent public phone, intelligent public phone processing module is to intelligent public phone platform request knot
Beam is conversed；Intelligent public phone platform stops charging and generates bill, goes to S3.
S3：Intelligent public phone simulates off-hook, issues bill to intelligent public phone platform request, intelligent public phone platform passes through
Bill is sent to intelligent public phone by FSK (Frequency-shift keying, frequency shift keying), goes to S4.
S4：After intelligent public phone receives bill, intelligent public phone simulates on-hook, takes completion under intelligent public phone, terminates.
S4 is further comprising the steps of：If intelligent public phone does not receive bill, extend time of the expense that issues to 20 seconds with
On, it is issuing in cost-time, intelligent public phone asks to issue bill to intelligent public phone platform again, and request intelligent public phone is flat
Platform sends current bill.
The lower of intelligent public phone takes under IMS network there are many scene, shown in Fig. 2 a and Fig. 2 b, the base in the present embodiment
When the intelligent public phone implementation method of SIP voice home gateways is applied to media control realization scene, following steps are specifically included：
Step 1~4 in A01, such as Fig. 2 a, the intelligent public phone that user uses pass through signaling (such as SIP or H248, media
Gateway control protocol) it is called with the foundation of intelligent public phone platform；Intelligent public phone platform issues answer signal with charge, intelligence to intelligent public phone
Can payphone to intelligent public phone platform to respond answer signal.Intelligent public phone processing module detects that answer signal with charge is DTMF
(Dual Tone Multi Frequency, touch-tone signal) signal C, response answer signal are dtmf signal A, are determined as
Intelligent Pay Phone Service, the intelligent public phone that user uses and callee's normal talking, intelligent public phone platform start charging, go to step
A02。
A02：Such as the step 5 and 6 in Fig. 2 a, after user carries out on-hook operation to intelligent public phone, intelligent public phone processing module
It keeps Media Stream while generating and sending BYE message to intelligent public phone platform (terminate to converse to intelligent public phone platform request)；
After intelligent public phone platform receives BYE message, stop charging, generates bill, go to step A03.
Step 7 and 8 in A03, such as Fig. 2 a, intelligent public phone simulate off-hook, send voice signal to intelligent public phone platform, ask
It asks and issues bill；Intelligent public phone platform is by FSK (Frequency-shift keying, frequency shift keying) by bill
It is sent to intelligent public phone, goes to step A04.
Step 9~11 in A04, such as Fig. 2 a, after intelligent public phone receives bill, intelligent public phone is to intelligent public phone platform
It responds audible signal reception to complete, request terminates call, and intelligent public phone processing module discharges resource, terminates Media Stream.Intelligence is public
Words simulate on-hook, take completion under intelligent public phone, terminate.
Intelligent public phone simulates on-hook in step A04, takes completion under intelligent public phone, specifically includes following steps：Intelligent public phone
Processing module checks whether resource discharges, if so, taking completion under intelligent public phone, terminates；Otherwise resource is discharged, is taken under intelligent public phone
It completes, terminates.
Shown in Fig. 3 a and Fig. 3 b, the intelligent public phone implementation method based on SIP voice home gateways in the present embodiment
When controlling realization scene applied to signaling, following steps are specifically included：
Step 1~3 in B01, such as Fig. 3 a, the intelligent public phone that user uses send invite to intelligent public phone platform and (invite
Please) message, intelligent public phone platform respond 200OK message (i.e. response message) to intelligent public phone.Intelligent public phone processing module detects
To called-control fields are carried in 200OK message, it is determined as Intelligent Pay Phone Service, the intelligent public phone and quilt that user uses
The side's of crying normal talking, intelligent public phone platform start charging, go to step B02.
Step 4 and 5 in B02, such as Fig. 3 a, after user carries out on-hook operation to intelligent public phone, intelligent public phone processing module
Pause Media Stream and meanwhile generate and send carry user-suspended fields invite message to intelligent public phone platform (i.e.
Terminate to converse to intelligent public phone platform request), the invite that intelligent public phone platform receives carrying user-suspended fields disappears
After breath, stop charging, generates bill, go to step B03.
Step 6~8 in B03, such as Fig. 3 a, intelligent public phone simulate off-hook, and intelligent public phone processing module restores Media Stream, simultaneously
The invite message for carrying user-suspended fields is sent to intelligent public phone platform again, request issues bill；Intelligence
Bill is sent to intelligent public phone by energy payphone platform by FSK, goes to step B04.
Step 9~11 in B04, such as Fig. 3 a, after intelligent public phone receives bill, intelligent public phone platform is to intelligent public phone
Processing module requires to terminate call, and intelligent public phone processing module discharges resource.Intelligent public phone simulates on-hook, has taken under intelligent public phone
At end.
Intelligent public phone simulates on-hook in step B04, takes completion under intelligent public phone, specifically includes following steps：Intelligent public phone
Processing module checks whether resource discharges, if so, taking completion under intelligent public phone, terminates；Otherwise resource is discharged, is taken under intelligent public phone
It completes, terminates.
The present invention is not limited to the above-described embodiments, for those skilled in the art, is not departing from
Under the premise of the principle of the invention, several improvements and modifications can also be made, these improvements and modifications are also considered as the protection of the present invention
Within the scope of.The content not being described in detail in this specification belongs to the prior art well known to professional and technical personnel in the field.
Claims (8)
1. a kind of intelligent public phone based on SIP voice home gateways realizes system, including is used to connect intelligent public phone and IMS network
IMS voice servers home gateway, home gateway includes voice module, it is characterised in that：It is arranged on the voice module
There is intelligent public phone processing module；
When the system realizes intelligent public phone, IMS voice servers and intelligence that intelligent public phone that user uses passes through IMS network
Payphone platform establishes calling；Intelligent public phone is shaken hands successfully with intelligent public phone platform and intelligent public phone processing module determines and shakes hands
Information is corresponding to be opened for intelligent public phone and callee's normal talking, intelligent public phone platform that after Intelligent Pay Phone Service, user uses
Beginning charging；
After user carries out on-hook operation to intelligent public phone, intelligent public phone processing module terminates to converse to intelligent public phone platform request；
Intelligent public phone platform stops charging and generates bill；Intelligent public phone simulate off-hook, to intelligent public phone platform request under give orders or instructions
Take bill, bill is sent to intelligent public phone by intelligent public phone platform by frequency shift keying fsk；Intelligent public phone receives telephone expenses account
Dan Hou, intelligent public phone simulate on-hook, take completion under intelligent public phone；
The system during media control and realize scene when realizing intelligent public phone：
The intelligent public phone that user uses is established by signaling and intelligent public phone platform and is called；Intelligent public phone platform is under intelligent public phone
Answer signal with charge is sent out, intelligent public phone sends back to intelligent public phone platform and answers answer signal；Intelligent public phone processing module detects
Answer signal with charge is touch-tone signal dtmf signal C, and response answer signal is dtmf signal A, is determined as intelligent public phone industry
Business, the intelligent public phone that user uses and callee's normal talking, intelligent public phone platform start charging；
After user carries out on-hook operation to intelligent public phone, intelligent public phone processing module keeps Media Stream while generating and sending BYE
Message is to intelligent public phone platform；After intelligent public phone platform receives BYE message, stop charging, generates bill；Intelligent public phone mould
Quasi- off-hook sends voice signal to intelligent public phone platform, and request issues bill；Intelligent public phone platform passes through frequency shift keying
Bill is sent to intelligent public phone by FSK；After intelligent public phone receives bill, intelligent public phone is responded to intelligent public phone platform
Audible signal reception is completed, and request terminates call, and intelligent public phone processing module discharges resource, terminates Media Stream；Intelligent public phone mould
Intend on-hook, takes completion under intelligent public phone.
2. the intelligent public phone based on SIP voice home gateways realizes system as described in claim 1, which is characterized in that described
System during signaling controls and realizes scene when realizing intelligent public phone：
The intelligent public phone that user uses sends invite message to intelligent public phone platform, and intelligent public phone platform is responded to intelligent public phone
200OK message；Intelligent public phone processing module detects carrying called-control fields in 200OK message, is determined as intelligence
General phone service, the intelligent public phone that user uses and callee's normal talking, intelligent public phone platform start charging；
After user carries out on-hook operation to intelligent public phone, intelligent public phone processing module, which is suspended Media Stream while being generated and sent, to be taken
For invite message with user-suspended fields to intelligent public phone platform, intelligent public phone platform, which receives, carries user-
After the invite message of suspended fields, stop charging, generates bill；
Intelligent public phone simulates off-hook, and intelligent public phone processing module restores Media Stream and send to intelligent public phone platform again to carry
The invite message of user-suspended fields, request issue bill；Intelligent public phone platform is by FSK by bill
It is sent to intelligent public phone；
After intelligent public phone receives bill, intelligent public phone platform requires to terminate call to intelligent public phone processing module, and intelligence is public
It talks about processing module and discharges resource；Intelligent public phone simulates on-hook, takes completion under intelligent public phone.
3. a kind of intelligent public phone implementation method based on SIP voice home gateways for system described in claims 1 or 2,
It is characterized in that, includes the following steps：
S1：The intelligent public phone that user uses is established with intelligent public phone platform by the IMS voice servers of IMS network and is called；Intelligence
Energy payphone and intelligent public phone platform are shaken hands successfully and intelligent public phone processing module determines that corresponding with handshaking information is intelligent public phone
After business, intelligent public phone and the callee's normal talking that user uses, intelligent public phone platform start charging, go to S2；
S2：After user carries out on-hook operation to intelligent public phone, intelligent public phone processing module terminates to lead to intelligent public phone platform request
Words；Intelligent public phone platform stops charging and generates bill, goes to S3；
S3：Intelligent public phone simulates off-hook, issues bill to intelligent public phone platform request, intelligent public phone platform passes through frequency displacement key
Bill is sent to intelligent public phone by control FSK, goes to S4；
S4：After intelligent public phone receives bill, intelligent public phone simulates on-hook, takes completion under intelligent public phone, terminates.
4. the intelligent public phone implementation method based on SIP voice home gateways as claimed in claim 3, which is characterized in that S4 is also
Include the following steps：If intelligent public phone does not receive bill, extends the time for the expense that issues to 20 seconds or more, issuing expense
In time, intelligent public phone asks to issue bill to intelligent public phone platform again, and request intelligent public phone platform sends current words
Take bill.
5. a kind of intelligent public phone implementation method based on SIP voice home gateways for system described in claims 1 or 2,
It is characterized in that, when the intelligent public phone implementation method is applied to media control realization scene, specifically includes following steps：
S1：The intelligent public phone that user uses is established by signaling and intelligent public phone platform and is called；Intelligent public phone platform is to intelligent public affairs
Words issue answer signal with charge, and intelligent public phone sends back to intelligent public phone platform and answers answer signal；Intelligent public phone processing module is examined
It is touch-tone signal dtmf signal C to measure answer signal with charge, and response answer signal is dtmf signal A, is determined as intelligent public affairs
Call business, the intelligent public phone that user uses and callee's normal talking, intelligent public phone platform start charging, go to S2；
S2：After user carries out on-hook operation to intelligent public phone, intelligent public phone processing module keeps Media Stream to generate and send simultaneously
BYE message is to intelligent public phone platform；After intelligent public phone platform receives BYE message, stop charging, generates bill, go to S3；
S3：Intelligent public phone simulates off-hook, sends voice signal to intelligent public phone platform, request issues bill；Intelligent public phone
Bill is sent to intelligent public phone by platform by frequency shift keying fsk, goes to S4；
S4：After intelligent public phone receives bill, intelligent public phone is responded audible signal reception to intelligent public phone platform and is completed, request
Call is terminated, intelligent public phone processing module discharges resource, terminates Media Stream；Intelligent public phone simulates on-hook, has taken under intelligent public phone
At end.
6. the intelligent public phone implementation method based on SIP voice home gateways as claimed in claim 5, it is characterised in that：In S4
Intelligent public phone simulates on-hook, takes completion under intelligent public phone, specifically includes following steps：Intelligent public phone processing module checks that resource is
No release terminates if so, taking completion under intelligent public phone；Otherwise resource is discharged, completion is taken under intelligent public phone, is terminated.
7. a kind of intelligent public phone implementation method based on SIP voice home gateways for system described in claims 1 or 2,
It is characterized in that, when the intelligent public phone implementation method is applied to signaling control realization scene, specifically includes following steps：
S1：The intelligent public phone that user uses sends invite message to intelligent public phone platform, and intelligent public phone platform is to intelligent public phone
Respond 200OK message；Intelligent public phone processing module detects carrying called-control fields in 200OK message, is determined as
Intelligent Pay Phone Service, the intelligent public phone that user uses and callee's normal talking, intelligent public phone platform start charging, go to S2；
S2：After user carries out on-hook operation to intelligent public phone, intelligent public phone processing module pause Media Stream generates and sends simultaneously
The invite message of user-suspended fields is carried to intelligent public phone platform, intelligent public phone platform, which receives, carries user-
After the invite message of suspended fields, stop charging, generates bill, go to S3；
S3：Intelligent public phone simulates off-hook, and intelligent public phone processing module is restored Media Stream and taken again to the transmission of intelligent public phone platform
Invite message with user-suspended fields, request issue bill；Intelligent public phone platform is by FSK by telephone expenses account
It is singly sent to intelligent public phone, goes to S4；
S4：After intelligent public phone receives bill, intelligent public phone platform requires to terminate call, intelligence to intelligent public phone processing module
Payphone processing module discharges resource；Intelligent public phone simulates on-hook, takes completion under intelligent public phone, terminates.
8. the intelligent public phone implementation method based on SIP voice home gateways as claimed in claim 7, it is characterised in that：In S4
Intelligent public phone simulates on-hook, takes completion under intelligent public phone, specifically includes following steps：Intelligent public phone processing module checks that resource is
No release terminates if so, taking completion under intelligent public phone；Otherwise resource is discharged, completion is taken under intelligent public phone, is terminated.
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