CN1859476A - Group audible ringing tone system and its service realizing method - Google Patents
Group audible ringing tone system and its service realizing method Download PDFInfo
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- CN1859476A CN1859476A CN 200510089000 CN200510089000A CN1859476A CN 1859476 A CN1859476 A CN 1859476A CN 200510089000 CN200510089000 CN 200510089000 CN 200510089000 A CN200510089000 A CN 200510089000A CN 1859476 A CN1859476 A CN 1859476A
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Abstract
The present invention provides grouping ringing back tone system and service implementation method, wherein population ringing back tone system is realized by increasing ringing back tone platform in current grouping telephone exchange service system. It contains grouping telephone exchange service platform receiving calling side calling switching signaling, switching calling to called extension side, after receiving called extension side returned response signaling, blocking called extension side telephone channel connection and establishing connection with set ringing back tone platform, then ringing back tone platform through grouping telephone exchange service platform playing ringing back tone to calling side.
Description
Technical field
The ring-back tone that the present invention relates in the communication network provides technology, is meant a kind of group audible ringing tone system and service implementation method thereof especially.
Background technology
Group switchboard business is a business of founding at group customer specially.This business is that group customer distributes the general number of common travelling carriage integrated services digital network (MSISDN) number as this group.In the calling subscriber wants to call out this group, during the member, only need to call out the general number of this group, can get in touch with member in this group by direct dialing extension number, acoustic control service or human relay working service etc. then.
Existing being used for provides the system of group switchboard business to realize by introducing the group switchboard business platform at existing communication network, this system configuration mainly comprises caller gateway MSC/mobile switching centre (GMSC/MSC), exchange attaching position register (HLR), group switchboard business platform, switching GMSC/MSC, called extension set HLR and called extension set visited MSC etc. as shown in Figure 1.Wherein, in exchange HLR, the mobile switchboard number is registered Call Forwarding Unconditional to group switchboard business platform address.Call flow based on said system is: the calling user dials group main number, and caller GMSC/MSC sends the route requests that comprises this group main number to exchange HLR then; After exchange HLR receives this route requests, judge that the group user corresponding with this group main number registered Call Forwarding Unconditional, then directly return the transferred number of expression group switchboard business platform address to this caller GMSC/MSC.Caller GMSC/MSC arrives the group switchboard business platform according to the transferred number that receives with call proceeding; Then the group switchboard business platform by playback collect the digits, flow process such as speech recognition or operator attendance and calling subscriber be mutual, the called extension subscriber termination number that acquisition will be routed to, and with this call proceeding to the GMSC/MSC that transfers.If called extension subscriber is his network users, the GMSC/MSC that then transfers to his net network, finishes call proceeding to called extension subscriber by his net with call proceeding; If called extension subscriber is this network users, the GMSC/MSC that then transfers obtains mobile station roaming number (MSRN) from called extension set HLR, then according to the MSRN that obtains with call proceeding to called extension set visited MSC; Called extension set visited MSC is finished the call proceeding to called extension subscriber.
Said system and flow process have realized providing for group user the purpose of group switchboard business.At present, develop rapidly at personal user's audible ringing tone service, this business replaces the dull ring-back tone of tradition by one section melodious music or a greeting are provided for the calling subscriber.And for the personal user, group user often has bigger propaganda demand for the needs of business development.Therefore, how for group user provides the personalized ring back tone service with group's characteristic, promptly the group audible ringing tone business just becomes the previous problem demanding prompt solution of order.
Summary of the invention
In view of this, one object of the present invention is to provide a kind of group audible ringing tone system, is embodied as the purpose that group user provides audible ringing tone service.
In order to achieve the above object, group audible ringing tone system provided by the invention comprises: Calling Side call proceeding unit, group switchboard business platform, callee side call proceeding unit; Wherein,
The group switchboard business platform is used for sending the second call proceeding signaling to callee side call proceeding unit after receiving the first call proceeding signaling that Calling Side call proceeding unit sends, with call proceeding to callee side call proceeding unit;
This system also comprises: ring-back platform, described ring-back platform are used for after receiving from the instruction of the playing RBT of group switchboard business platform, by group switchboard business platform and Calling Side call proceeding unit to the call subscriber terminal playing RBT;
And described group switchboard business platform also is used for after continuing of receiving that callee side call proceeding unit returns replied signaling, block conversation speech channel with callee side call proceeding unit, and, connect with ring-back platform to the instruction of ring-back platform transmission playing RBT.
In said system, described group switchboard business platform is further used for receiving after the conversation of returning callee side call proceeding unit replys signaling, again activate and be connected with the speech channel of callee side call proceeding unit, and to the instruction of ring-back platform transmission stopping playing RBT, dismounting is connected with ring-back platform;
Described ring-back platform also be used for receive the group switchboard business platform stop playing RBT instruction after, stop to the call subscriber terminal playing RBT.
In said system, described Calling Side call proceeding unit comprises: the caller gateway MSC/GMSC/MSC of mobile switching centre; Described callee side call proceeding unit comprises: switching gateway MSC/GMSC/MSC of mobile switching centre; And the described first call proceeding signaling is: the initial address message IAM that comprises group switchboard business platform address, group main number and call subscriber terminal number; The second call proceeding signaling is: the IAM that comprises called extension subscriber termination number and call subscriber terminal number; Described continuing replied signaling and is: Address Complete Message ACM; Described playing RBT instruction is: the IAM that comprises ring-back platform route prefix and group main number; It is response message ANM that signaling is replied in described conversation; Describedly stop playing RBT instruction and be: release message REL.
In said system, described group switchboard business platform also is used for after the first call proceeding signaling that receives the transmission of Calling Side call proceeding unit, obtain called extension subscriber termination number alternately with the calling subscriber, send the second call proceeding signaling according to the called extension subscriber termination number that obtains to callee side call proceeding unit then.
In said system, described group switchboard business platform is used for after continuing of receiving that callee side call proceeding unit returns replied signaling, when judging that called extension subscriber terminal is current and be in idle condition, block conversation speech channel with callee side call proceeding unit according to the called extension subscriber terminal's status information that carries in this signaling.
Another object of the present invention is to provide a kind of group audible ringing tone service implementation method, and this method comprises the steps:
A, Calling Side call proceeding unit send the first call proceeding signaling to the group switchboard business platform after receiving the call request of call subscriber terminal transmission;
B, group switchboard business platform send the second call proceeding signaling to callee side call proceeding unit after receiving the first call proceeding signaling of Calling Side call proceeding unit transmission;
After c, callee side call proceeding unit receive the second call proceeding signaling of group switchboard business platform, call proceeding to called extension subscriber terminal, and is returned to continue to the group switchboard business platform and replied signaling;
D, group switchboard business platform receive that callee side call proceeding unit returns continue reply signaling after, block the conversation speech channel with callee side call proceeding unit, and send the playing RBT instruction to ring-back platform, connect with ring-back platform;
E, ring-back platform receive from after the instruction of the playing RBT of group switchboard business platform, by group switchboard business platform and Calling Side call proceeding unit to the call subscriber terminal playing RBT.
In said method, described step b further comprises: after the group switchboard business platform receives the first call proceeding signaling of Calling Side call proceeding unit transmission, by obtaining called extension subscriber termination number alternately, then according to the step that sends the second call proceeding signaling described in this called extension subscriber termination number execution in step b that obtains with the calling subscriber.
In said method, described steps d further comprises: after group switchboard business platform continuing of receiving that callee side call proceeding unit returns replied signaling, judge the current idle condition that whether is in of called extension subscriber terminal according to the called extension subscriber terminal's status information that carries in this signaling, if then block the step of speech channel of conversing described in the execution in step d.
In said method, described steps d further comprises: after group switchboard business platform continuing of receiving that callee side call proceeding unit returns replied signaling, whether judgement has opened the group audible ringing tone business at corresponding group main number, if then block the step of speech channel of conversing described in the execution in step d.
In said method, further comprise step after the described step e:
F, after called extension subscriber off-hook is replied, callee side call proceeding unit returns conversation to the group switchboard business platform and replys signaling;
G, group switchboard business platform receive after the conversation of returning callee side call proceeding unit replys signaling, again activate and be connected with the speech channel of callee side call proceeding unit, and to the instruction of ring-back platform transmission stopping playing RBT, dismounting is connected with ring-back platform.
In sum, the invention provides a kind of group audible ringing tone system and service implementation method thereof, wherein, group audible ringing tone system is realized by add ring-back platform in existing group switchboard business system.Basic principle of the present invention is: receive the call proceeding signaling of Calling Side when the group switchboard business platform after, with call proceeding to called minute pusher side, and when the group switchboard business platform receive that called minute pusher side return reply signaling after, block and be connected with the speech channel of called minute pusher side, and connect with the ring-back platform that is provided with, then by ring-back platform by the group switchboard business platform to the Calling Side playing RBT.Thereby realized after the calling subscriber calls out group switchboard, when continuing in the group extension subscriber, play the purpose of the customized ring-back tone of group to the calling subscriber by group switchboard.
Description of drawings
Fig. 1 is existing group switchboard business system construction drawing.
Fig. 2 is a group audible ringing tone system structure chart of the present invention.
Fig. 3 is a group audible ringing tone service implementation method flow chart of the present invention.
Embodiment
Group audible ringing tone system of the present invention is further to increase ring-back platform to realize on the basis of existing group switchboard business system.The basic functional principle of this system is: receive the call proceeding signaling of Calling Side when the group switchboard business platform after, with call proceeding to called minute pusher side, and when the group switchboard business platform receive that called minute pusher side return reply signaling after, block and be connected with the speech channel of called minute pusher side, and connect with the ring-back platform that is provided with, then by ring-back platform by the group switchboard business platform to the Calling Side playing RBT.
Describe the present invention in detail below by specific embodiment.
The group audible ringing tone system structure of one embodiment of the present of invention as shown in Figure 2, mainly comprise: caller GMSC/MSC, exchange HLR, group switchboard business platform, switching GMSC/MSC, called extension set HLR and called extension set visited MSC, in addition, this system also comprises: ring-back platform.Wherein,
Caller GMSC/MSC is used for after the call request that receives the call subscriber terminal transmission, send route requests according to the group main number that carries in the request to exchange HLR, and the transferred number that returns according to exchange HLR, send the initial address message (IAM) comprise group switchboard business platform address, group main number and call subscriber terminal number to the group switchboard business platform, with call proceeding to the group switchboard business platform.
Exchange HLR is used for returning the transferred number corresponding with group main number to caller GMAC/MSC after the route requests that receives caller GMAC/MSC, i.e. group switchboard business platform address.
The group switchboard business platform is used for behind the IAM that receives caller GMSC/MSC, by obtaining the called extension subscriber termination number that will be routed to alternately with the calling subscriber, send the IAM that comprises called extension subscriber termination number and call subscriber terminal number according to the called extension subscriber termination number that obtains to switching GMSC/MSC then, with call proceeding to the GMSC/MSC that transfers; Also be used for after receiving the Address Complete Message (ACM) that returns of switching GMSC/MSC, block with the speech channel of switching GMSC/MSC and is connected, and instruct to ring-back platform transmission playing RBT; And after the response message (ANM) that receives switching GMSC/MSC transmission, activation is connected with the speech channel of switching GMSC/MSC again, and to the instruction of ring-back platform transmission stopping playing RBT, dismounting is connected with ring-back platform.
Wherein, described playing RBT instruction is: the initial address message IAM that comprises called party number parameter and calling number parameter, and described called party number parameter is: " ring-back platform route prefix+group main number ", described calling number parameter is: the call subscriber terminal number.Describedly stop playing RBT instruction and be: discharge (REL) message.
Switching GMSC/MSC is used for behind the IAM that receives the group switchboard business platform, with call proceeding to called extension subscriber terminal, and when called extension subscriber during for his network users, with call proceeding to his net network; When called extension subscriber is this network users, then obtain the MSRN of called extension subscriber from called extension set HLR, send IAM according to the MSRN that obtains to called extension set visited MSC then, with call proceeding to called extension set visited MSC.
Called extension set HLR is used for providing to switching GMSC/MSC the MSRN of the called extension subscriber of Home Network.
Called extension set visited MSC is used for finishing to the call proceeding of the called extension subscriber terminal of Home Network behind the IAM that receives switching GMSC/MSC.
Ring-back platform is used for after the playing RBT instruction that receives from the group switchboard business platform, by group switchboard business platform and Calling Side call proceeding unit to the call subscriber terminal playing RBT, and receive the group switchboard business platform stop playing RBT instruction after, stop to the call subscriber terminal playing RBT.
The group audible ringing tone system structure of a specific embodiment of the present invention more than has been described, wherein said caller GMSC/MSC, exchange HLR, switching GMSC/MSC, called extension set HLR and called extension set visited MSC etc. are call proceeding unit common in the existing network, as caller GMSC/MSC is Calling Side call proceeding unit, and switching GAMSC/MSC is callee side call proceeding unit.In addition, the present invention is also applicable to other network, promptly in network of relation, increase group switchboard business platform and ring-back platform, and make the group switchboard business platform link to each other to fetch realization provides group audible ringing tone for group user by corresponding network purpose with the call proceeding unit of corresponding network.And respective call contiguous unit and group switchboard business platform also can be provided with according to the intrinsic agreement of corresponding network.For example, in next generation network (NGN), soft switch can link to each other with the group switchboard business platform as calling and called side call proceeding unit simultaneously, then can be equally according to the above-mentioned purpose that is realized providing for group user by the NGN network audible ringing tone service by group switchboard business platform control ring-back platform.In addition, other network also can adopt similar fashion to realize the group audible ringing tone business, repeats no longer one by one herein.
Describe group audible ringing tone service implementation method of the present invention below in detail, this method flow specifically comprises the steps: as shown in Figure 3
Step 101: the process that Calling Side and group switchboard business platform continue, this process is specific as follows: the calling subscriber dials group main number by terminal equipments such as landline telephone, mobile phones, sends call request to caller GMSC/MSC; After caller GMSC/MSC receives call request from call subscriber terminal, obtain the Call Forwarding Unconditional number of group user registration from exchange HLR, it is the address of group switchboard business platform, caller GMSC/MSC sends the IAM comprise called party number parameter, original called party number parameter and calling number parameter according to this transferred number to the group switchboard business platform then, with call proceeding to the group switchboard business platform.
Wherein, the called party number parameter that comprises among the described IAM of this step is group switchboard business platform address, and the original called party number parameter is a group main number, and the calling number parameter is the call subscriber terminal number.
Step 102: the group switchboard business platform returns ACM and ANM to caller GMSC/MSC after receiving the IAM of caller GMSC/MSC transmission.
Step 103: the group switchboard business platform is by obtaining the called extension subscriber termination number that continues alternately with the calling subscriber.Wherein, group switchboard business platform and calling subscriber's alternant way can be taked: playback collects the digits, speech recognition or operator attendance inquiry etc.
Step 104: the group switchboard business platform sends the IAM that comprises called extension subscriber termination number and call subscriber terminal number according to the called extension subscriber termination number that obtains to switching GMSC/MSC, with call proceeding to the GMSC/MSC that transfers.
Step 105: after switching GMSC/MSC receives the IAM of group switchboard business platform transmission, from message, obtain the called extension subscriber termination number that comprises, and judge whether this called extension subscriber belongs to his network users, if, then with call proceeding to his net network, be accomplished to continuing of called extension set by his net network; Otherwise, obtain MSRN from the HLR of called extension set ownership, then with the visited MSC of call proceeding under the called extension set; And after switching GMSC/MSC receives the ALERTING message that called extension subscriber terminal returns, return ACM to the group switchboard business platform.
In addition, in above-mentioned steps 104, if the support of group switchboard business platform then can not passed through switching GMSC/MSC, and directly call proceeding be arrived the visited MSC under the called extension subscriber terminal from the MSRN that HLR obtains called extension set.
Step 106: after the group switchboard business platform is received the ACM of callee side, return call progress message (CPG, Call Progress Message) to caller GMSC/MSC.
Step 107: the group switchboard business platform is according to this ACM that receives, judge the current idle condition that whether is in of called subscriber, if, then opened the sign of group audible ringing tone business according to the group switchboard of record, temporary transient conversation speech channel of blocking called minute pusher side, shield the ring-back tone of pusher side broadcast in called minute, simultaneously the ring-back platform under group main number sends and comprises: the IAM of ring-back platform route prefix, group main number, called extension subscriber termination number and call subscriber terminal number is established to the conversation speech channel of ring-back platform.
Wherein, the described ring-back platform route prefix of this step is used to make the group switchboard business platform to route the call to the route prefix of ring-back platform.
Step 108: after ring-back platform received the IAM of group switchboard business platform transmission, the ring-back tone according to group main number selection customization returned ACM to the group switchboard business platform then.
Wherein, the step of above-mentioned selection ring-back tone is based on group user is provided with unified ring-back tone at all calling subscribers and all group's extension subscribers situation.Certainly group user also can be provided with different ring-back tones at the called extension subscriber of different calling subscribers or group, thereby realizes the variation of group audible ringing tone.For example: when group user will realize playing different group audible ringing tones at different calling subscribers, can take: set up and preserve at ring-back platform in advance: the triangular corresponding relation of group main number, rear subscriber number and ring-back tone, like this in above-mentioned steps 108, when ring-back platform receives IAM, just can according to above-mentioned corresponding relation for the calling subscriber plays corresponding ring-back tone.And when group user will realize at different groups extension subscriber different ring-back tone being set, then take: set up and preserve at ring-back platform in advance: group main number, group's extension number and the triangular corresponding relation of ring-back tone, thereby in above-mentioned steps 108, when ring-back platform receives IAM, can play corresponding ring-back tone according to the corresponding relation of preserving.But also can further set up: the corresponding relation between rear subscriber number, group main number, group's extension number and ring-back tone, thus can further segment the ring-back tone kind of selecting broadcast.In addition, also exist other to realize the diversified mode of group audible ringing tone kind, too numerous to enumerate herein.
Step 109: after the group switchboard business platform receives this ACM, send CPG to caller GMSC/MSC.
Step 110: ring-back platform by group switchboard business platform and caller GMSC/MSC to calling subscriber's playing RBT.
Step 111: after called extension subscriber was replied, switching GMSC/MSC returned ANM to the group switchboard business platform.
Step 112: after the group switchboard business platform receives this ANM, send CPG to caller GMSC/MSC, and activate the conversation speech channel between calling subscriber and the called extension subscriber, the ring-back tone that ring-back platform is play is by bypass.
Step 113: calling subscriber and called extension subscriber begin conversation.
Step 114: the group switchboard business platform sends REL message, the speech channel of removing ring-back platform to ring-back platform.
Step 115: ring-back platform returns to discharge finishes (RLC) message.
Because follow-up end of calling flow process and existing group switchboard business are in full accord, so repeat no more herein.
Thereby finally realized when calling user dials group switchboard switching extension set, playing the purpose of the group audible ringing tone of group's customization, the extension set here can be any kind phone, and same group both can be provided with identical ring-back tone at different calling subscribers with different called extension subscribers, also different ring-back tones can be set.
In a word, the above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.
Claims (10)
1, a kind of group audible ringing tone system, this system comprises at least: Calling Side call proceeding unit, group switchboard business platform, callee side call proceeding unit; Wherein,
The group switchboard business platform is used for sending the second call proceeding signaling to callee side call proceeding unit after receiving the first call proceeding signaling that Calling Side call proceeding unit sends, with call proceeding to callee side call proceeding unit; It is characterized in that,
This system also comprises: ring-back platform, described ring-back platform are used for after receiving from the instruction of the playing RBT of group switchboard business platform, by group switchboard business platform and Calling Side call proceeding unit to the call subscriber terminal playing RBT;
And described group switchboard business platform also is used for after continuing of receiving that callee side call proceeding unit returns replied signaling, block conversation speech channel with callee side call proceeding unit, and, connect with ring-back platform to the instruction of ring-back platform transmission playing RBT.
2, system according to claim 1, it is characterized in that, described group switchboard business platform is further used for receiving after the conversation of returning callee side call proceeding unit replys signaling, again activate and be connected with the speech channel of callee side call proceeding unit, and to the instruction of ring-back platform transmission stopping playing RBT, dismounting is connected with ring-back platform;
Described ring-back platform also be used for receive the group switchboard business platform stop playing RBT instruction after, stop to the call subscriber terminal playing RBT.
3, system according to claim 2 is characterized in that, described Calling Side call proceeding unit comprises: the caller gateway MSC/GMSC/MSC of mobile switching centre; Described callee side call proceeding unit comprises: switching gateway MSC/GMSC/MSC of mobile switching centre; And the described first call proceeding signaling is: the initial address message IAM that comprises group switchboard business platform address, group main number and call subscriber terminal number; The second call proceeding signaling is: the IAM that comprises called extension subscriber termination number and call subscriber terminal number; Described continuing replied signaling and is: Address Complete Message ACM; Described playing RBT instruction is: the IAM that comprises ring-back platform route prefix and group main number; It is response message ANM that signaling is replied in described conversation; Describedly stop playing RBT instruction and be: release message REL.
4, according to any described system in the claim 1 to 3, it is characterized in that, described group switchboard business platform also is used for after the first call proceeding signaling that receives the transmission of Calling Side call proceeding unit, obtain called extension subscriber termination number alternately with the calling subscriber, send the second call proceeding signaling according to the called extension subscriber termination number that obtains to callee side call proceeding unit then.
5, according to any described system in the claim 1 to 3, it is characterized in that, described group switchboard business platform is used for after continuing of receiving that callee side call proceeding unit returns replied signaling, when judging that called extension subscriber terminal is current and be in idle condition, block conversation speech channel with callee side call proceeding unit according to the called extension subscriber terminal's status information that carries in this signaling.
6, a kind of group audible ringing tone service implementation method based on the described system of claim 1 is characterized in that this method comprises:
A, Calling Side call proceeding unit send the first call proceeding signaling to the group switchboard business platform after receiving the call request of call subscriber terminal transmission;
B, group switchboard business platform send the second call proceeding signaling to callee side call proceeding unit after receiving the first call proceeding signaling of Calling Side call proceeding unit transmission;
After c, callee side call proceeding unit receive the second call proceeding signaling of group switchboard business platform, call proceeding to called extension subscriber terminal, and is returned to continue to the group switchboard business platform and replied signaling;
D, group switchboard business platform receive that callee side call proceeding unit returns continue reply signaling after, block the conversation speech channel with callee side call proceeding unit, and send the playing RBT instruction to ring-back platform, connect with ring-back platform;
E, ring-back platform receive from after the instruction of the playing RBT of group switchboard business platform, by group switchboard business platform and Calling Side call proceeding unit to the call subscriber terminal playing RBT.
7, method according to claim 6, it is characterized in that, described step b further comprises: after the group switchboard business platform receives the first call proceeding signaling of Calling Side call proceeding unit transmission, by obtaining called extension subscriber termination number alternately, then according to the step that sends the second call proceeding signaling described in this called extension subscriber termination number execution in step b that obtains with the calling subscriber.
8, method according to claim 6, it is characterized in that, described steps d further comprises: after group switchboard business platform continuing of receiving that callee side call proceeding unit returns replied signaling, judge the current idle condition that whether is in of called extension subscriber terminal according to the called extension subscriber terminal's status information that carries in this signaling, if then block the step of speech channel of conversing described in the execution in step d.
9, method according to claim 6, it is characterized in that, described steps d further comprises: after group switchboard business platform continuing of receiving that callee side call proceeding unit returns replied signaling, whether judgement has opened the group audible ringing tone business at corresponding group main number, if then block the step of speech channel of conversing described in the execution in step d.
10, according to any described method in the claim 6 to 9, it is characterized in that, further comprise step after the described step e:
F, after called extension subscriber off-hook is replied, callee side call proceeding unit returns conversation to the group switchboard business platform and replys signaling;
G, group switchboard business platform receive after the conversation of returning callee side call proceeding unit replys signaling, again activate and be connected with the speech channel of callee side call proceeding unit, and to the instruction of ring-back platform transmission stopping playing RBT, dismounting is connected with ring-back platform.
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| CN101409852B (en) * | 2007-10-09 | 2011-03-09 | 中兴通讯股份有限公司 | Method for implementing seat to playing music and to be in idle state simultaneously |
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| KR100450964B1 (en) * | 2001-10-13 | 2004-10-02 | 삼성전자주식회사 | Method for servicing of station group in internet protocol telephony exchange system |
| MY141558A (en) * | 2002-08-10 | 2010-05-14 | Sk Telecom Co Ltd | Method and apparatus for managing, presenting and changing ring-back sounds in subscriber-based ring-back sound service |
| KR100392767B1 (en) * | 2002-09-05 | 2003-07-28 | 에스케이 텔레콤주식회사 | Method for controlling IP Routing in Subscriber-based Ring-Back-Tone Service |
| KR100520370B1 (en) * | 2003-04-24 | 2005-10-20 | (주)디더블유솔루션스 | Method and apparatus for providing ring back tone using a private automatic branch exchange |
| CN1223130C (en) * | 2003-05-15 | 2005-10-12 | 华为技术有限公司 | Method of realizing back bell sound service in CDMA system |
| CN1604601A (en) * | 2003-09-30 | 2005-04-06 | 北京阔步科技有限公司 | A communication system capable of producing personalized ring back tone and implementing method thereof |
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| CN101409852B (en) * | 2007-10-09 | 2011-03-09 | 中兴通讯股份有限公司 | Method for implementing seat to playing music and to be in idle state simultaneously |
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