CN104468378A - Personal telephone router and communication method - Google Patents

Personal telephone router and communication method Download PDF

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Publication number
CN104468378A
CN104468378A CN201410776787.0A CN201410776787A CN104468378A CN 104468378 A CN104468378 A CN 104468378A CN 201410776787 A CN201410776787 A CN 201410776787A CN 104468378 A CN104468378 A CN 104468378A
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China
Prior art keywords
telephone network
network interface
telephone
user
phone
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Pending
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CN201410776787.0A
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Chinese (zh)
Inventor
雷帮军
刘军清
陈小辉
李云飞
徐光柱
董方敏
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
YICHANG QIANJUE ELECTRONIC TECHNOLOGY Co Ltd
China Three Gorges University CTGU
Original Assignee
YICHANG QIANJUE ELECTRONIC TECHNOLOGY Co Ltd
China Three Gorges University CTGU
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Publication date
Application filed by YICHANG QIANJUE ELECTRONIC TECHNOLOGY Co Ltd, China Three Gorges University CTGU filed Critical YICHANG QIANJUE ELECTRONIC TECHNOLOGY Co Ltd
Priority to CN201410776787.0A priority Critical patent/CN104468378A/en
Publication of CN104468378A publication Critical patent/CN104468378A/en
Pending legal-status Critical Current

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Abstract

The invention provides a personal telephone router. The personal telephone router provides telephone communication between a user and a remote party by using the first type of telephone network service and the second type of telephone network service which are different. The personal telephone router comprises a first telephone network interface and a second telephone network interface, wherein the first telephone network interface is combined with the first type of telephone network service and establishes a first communication link with the user through the first type of telephone network service; the second telephone network interface is combined with the second type of telephone network service and establishes a second communication link with the remote party through the second type of telephone network service. Through the personal telephone router, cheaper long-distance communication service can be provided for people in a long-term business trip or travel, and the communication cost is saved. All telephone routing operations are completed in the personal mobile router, so the security of personal position information can be guaranteed.

Description

Personal call router and communication means
Technical field
The present invention relates to telephone communication network technical field, particularly a kind of personal call router being applied to mobile communications network service, VOIP network service, fixed telephone network service; The invention still further relates to and utilize this kind of personal call router to carry out the method communicated.
Background technology
Personal mobile communication development is like a raging fire, and the value-added services such as IP phone also becomes more and more popular, message and multimedia message have also widely used, and 4G communication also formally raises the curtain, like this develop into the more service that our personal communication provides may.
The maximum advantage of IP phone is exactly relative to traditional telephone service, especially long-distance telecommunications service and mention that it is cheap.Therefore devise a lot of business converting system to be used for telephone toll call business being converted to a normal local telephone calls business and to add an IP phone call business.The roughly operation principle of these business conversion systems is as follows: calling party is a local routing providing of call business converting system provider first, after call connection is set up, first carry out authentication (user inputs a string Serial No. obtained in advance), then user inputs its telephone number really wanting to call out, after input, router can be connected by internet ip passage and far-end called subscriber.Call connection process as shown in Figure 1.
Business converting system is as shown in Figure 1 while user saves a lot of long distance telephone fee, there is a subject matter: the caller ID of called subscriber's display is the number of business conversion system provider but not original caller number, cause the identity information of calling party in conversing to be lost like this.The unique channel addressed this problem at present is directly called exactly, and this can to accept a local user for hanging up one's hat, but has to pay expensive wandering fee for the mobile subscriber that those are away on a trip for a long time.And direct calling makes user's whereabouts be easy to be followed the trail of by others.
Summary of the invention
In view of the foregoing defects the prior art has, the object of this invention is to provide a kind of equipment of individual mobile router (PMR), this equipment, by using cheap VOIP service, can make the cost of use of mobile phone more cheap.Meanwhile, all phone routing operations complete in individual mobile router, therefore can ensure the safety of personnel location information.Present invention also offers and utilize this individual router to carry out the method communicated.
For reaching above-mentioned purpose, the present invention takes following scheme:
A kind of personal call router, the telephone network services that this call router uses the first and the second dissimilar provides telephone communication between user and remote parties, it is characterized in that this call router comprises:
First telephone network interface, this first telephone network interface is combined with the telephone network services of the first type, sets up the first communication link by the first telephone network services and user;
Second telephone network interface, this second telephone network interface is combined with the telephone network services of the second type, sets up second communication link by the second telephone network services and remote parties;
Control and interconnect module, wherein the first telephone network interface is with the second telephone network interface for route carries out telecommunication, and wherein the first telephone network interface and the second telephone network interface are two different in following three types interface:
Landline telephone type telephone network interface;
Based on the telephone network interface of internet voice protocol type;
Or cellular telephone transceiver, is applicable to the telephone network of cellular-type, there is a SIM card port.
One is had at least to be cellular telephone transceiver in first telephone network interface and the second telephone network interface;
First telephone network interface and the second telephone network interface and to control and interconnect module is arranged in same shell to form a complete equipment.
Described personal call router allows that user is long-range to answer and get the phone relevant with SIM card, SIM card is different from the physical location of user, first telephone network interface selects from landline telephone type telephone network interface and the telephone network interface based on internet voice protocol type, and the second telephone network interface is the mobile cellular telephone transceiver having SIM card.
Also comprising a memory, for storing the user profile that user locates the first telephone network services business, making third party directly can relate to the phone of user the first telephone network services business from the second telephone network;
Described personal call router can judge whether the phone accessed by the first network interface is the user profile coming from memory storage;
Use the user profile stored, be established to user locates phone the first talking link connection the first telephone network services business.
Control to control the first telephone network interface with interconnect module, in response to the third party's remote phone from the second telephone network interface, be established to the first talking link connection that user locates phone the first telephone network services business, make it possible to communicate with third party's remote phone;
Controlling to be connected with the first talking link that interconnect module responds unsuccessfully, realize telephone answering service, to leave a message information for recording the third party received by the second telephone network interface.
When can be placed into the operator scheme of " noncontact ", control can not to attempt to set up the first above-mentioned talking link with interconnect module in this mode and be connected;
When described personal call router runs the operator scheme of " noncontact ", control can be configured to realize telephone answering service with interconnect module, and record the distal information received by the second telephone network interface.
Control to be configured to process management port with interconnect module, make the information of user's energy telemanagement record;
Control to respond with interconnect module the phone made at user first telephone network interface, dial target phone at the second telephone network interface, and two calls are combined, realize the communication of user and target phone;
Control to need to obtain target phone information from the phone of user with the configuration of interconnect module, and use this target phone information to set up new call by the second telephone network interface.
The call information that second telephone network interface provides is consistent with the address of the second telephone network interface in the telephone network services of the second type.
Personal call router with multiple SIM card interface, can make it possible to support that the access of multiple mobile phone forwards.
Form a telephonic communication system by two covers call router described above, second interface of first place's equipment is connected to the telephone network services business of type identical with the first interface of the second equipment; In first equipment, first interface is from base formula telephone network interface, and second is internet voice telephone network interface; In second equipment, first interface is internet voice telephone network interface, and second interface is the honeycomb mobile converter with SIM card port, for receiving mobile phone.
A method of telephone communication between user and remote port, comprises the following steps:
A () provides in the place away from user and remote port and user-dependent personal call router, this personal call router comprises the first telephone network interface, for being connected to the telephone network services of the first type; Second telephone network interface, this second telephone network interface is combined with the telephone network services of the second type;
B () sets up the first communication link by the telephone network services of the first type between user and equipment;
C () before step (b) or afterwards, by the telephone network services of the second type, sets up second communication link between remote parties and equipment;
D () connects the first communication link and the first communication link on personal call router, wherein the first telephone network interface and the second telephone network interface are different, are selected from two different in following three types interface: landline telephone type telephone network interface; Based on the telephone network interface of internet voice protocol type; Or cellular telephone transceiver, is applicable to the telephone network of cellular-type, there is a SIM card port.
The present invention has the following advantages and good effect:
1) by this personal call router, more cheap long distance traffic can be provided for the people of travelling of often travelling on business trips, save communications cost.
2) all phone routing operations complete in individual mobile router, therefore can ensure the safety of personnel location information.
Accompanying drawing explanation
A toll telephone is converted into the schematic diagram that a local call adds VOIP calling by Fig. 1;
Fig. 2 is the schematic block diagram of first PMR form instantiation;
Fig. 3 illustrates the schematic flow diagram receiving the processing procedure of calling when mobile;
Fig. 4 shows the flow chart by the processing procedure of PMR when calling out;
Fig. 5 is the schematic block diagram of second PVD form instantiation, comprises a landline telephone module, and one controls and interconnecting modules, and the PVD of a VOIP module (optional);
Fig. 6 shows the flow chart of the processing procedure of the calling undertaken by PVD as user;
Fig. 7 is the schematic block diagram of a kind of basic way of realization that can be used for realizing the first instantiation.
Fig. 8 shows the telephonic communication system be made up of two personal call routers.
Embodiment
Below in conjunction with accompanying drawing, embodiments of the present invention are described further.
A kind of personal call router provided by the invention, the telephone network services that this call router uses the first and the second dissimilar provides telephone communication between user and remote parties, it is characterized in that this call router comprises:
First telephone network interface, this first telephone network interface is combined with the telephone network services of the first type, sets up the first communication link by the first telephone network services and user;
Second telephone network interface, this second telephone network interface is combined with the telephone network services of the second type, sets up second communication link by the second telephone network services and remote parties;
Control and interconnect module, wherein the first telephone network interface is with the second telephone network interface for route carries out telecommunication, and wherein the first telephone network interface and the second telephone network interface are two different in following three types interface:
Landline telephone type telephone network interface;
Based on the telephone network interface of internet voice protocol type;
Or cellular telephone transceiver, is applicable to the telephone network of cellular-type, there is a SIM card port.
One is had at least to be cellular telephone transceiver in first telephone network interface and the second telephone network interface;
First telephone network interface and the second telephone network interface and to control and interconnect module is arranged in same shell to form a complete equipment.
Described personal call router allows that user is long-range to answer and get the phone relevant with SIM card, SIM card is different from the physical location of user, first telephone network interface selects from landline telephone type telephone network interface and the telephone network interface based on internet voice protocol type, and the second telephone network interface is the mobile cellular telephone transceiver having SIM card.
Also comprising a memory, for storing the user profile that user locates the first telephone network services business, making third party directly can relate to the phone of user the first telephone network services business from the second telephone network;
Described personal call router can judge whether the phone accessed by the first network interface is the user profile coming from memory storage;
Use the user profile stored, be established to user locates phone the first talking link connection the first telephone network services business.
Control to control the first telephone network interface with interconnect module, in response to the third party's remote phone from the second telephone network interface, be established to the first talking link connection that user locates phone the first telephone network services business, make it possible to communicate with third party's remote phone;
Controlling to be connected with the first talking link that interconnect module responds unsuccessfully, realize telephone answering service, to leave a message information for recording the third party received by the second telephone network interface.
When can be placed into the operator scheme of " noncontact ", control can not to attempt to set up the first above-mentioned talking link with interconnect module in this mode and be connected;
When described personal call router runs the operator scheme of " noncontact ", control can be configured to realize telephone answering service with interconnect module, and record the distal information received by the second telephone network interface.
Control to be configured to process management port with interconnect module, make the information of user's energy telemanagement record;
Control to respond with interconnect module the phone made at user first telephone network interface, dial target phone at the second telephone network interface, and two calls are combined, realize the communication of user and target phone;
Control to need to obtain target phone information from the phone of user with the configuration of interconnect module, and use this target phone information to set up new call by the second telephone network interface.
The call information that second telephone network interface provides is consistent with the address of the second telephone network interface in the telephone network services of the second type.
Personal call router with multiple SIM card interface, can make it possible to support that the access of multiple mobile phone forwards.
Form a telephonic communication system by two covers call router described above, second interface of first place's equipment is connected to the telephone network services business of type identical with the first interface of the second equipment; In first equipment, first interface is from base formula telephone network interface, and second is internet voice telephone network interface; In second equipment, first interface is internet voice telephone network interface, and second interface is the honeycomb mobile converter with SIM card port, for receiving mobile phone.
A method of telephone communication between user and remote port, comprises the following steps:
A () provides in the place away from user and remote port and user-dependent personal call router, this personal call router comprises the first telephone network interface, for being connected to the telephone network services of the first type; Second telephone network interface, this second telephone network interface is combined with the telephone network services of the second type;
B () sets up the first communication link by the telephone network services of the first type between user and equipment;
C () before step (b) or afterwards, by the telephone network services of the second type, sets up second communication link between remote parties and equipment;
D () connects the first communication link and the first communication link on personal call router, wherein the first telephone network interface and the second telephone network interface are different, are selected from two different in following three types interface: landline telephone type telephone network interface; Based on the telephone network interface of internet voice protocol type; Or cellular telephone transceiver, is applicable to the telephone network of cellular-type, there is a SIM card port.
First embodiment: the citation form of PMR equipment.
The citation form of PMR equipment is intended to the individual mobile switch serving as user in his/her original residence.When he/her leaves local local to other, he/her installs to his/her SIM card in PMR.Then his/her mobile phone all-calls will be sent to any mobile phone that he/her specifies (Local or Remote is by telephone wire or internet) by PMR equipment.Contrary, he/her can use any phone to phone his/her friend by this PMR, and his/her friends' mobile phone shows identical phone number, to people's impression is, he/her is always making a phone call with same mobile phone.
As shown in Figure 2, the citation form of PMR equipment comprises landline telephone module, controls and interconnecting modules, mobile telephone module and VOIP module.One skilled in the art will appreciate that whole system can use hardware implementing completely, or realize with the software being furnished with suitable PC and suitable interface card (for communicate and SIM card is installed) completely, or part using hardware and part software simulating.All callings to mobile telephone module (being actually SIM card) further by control and interconnecting modules (or VOIP module), will be connected to another preassigned phone.When user wants by his/her mobile phone dialing phone, first he/her call PMR equipment and find fixed telephone number or be connected to VOIP module by some VoIP service, then connects mobile telephone module further, carried out actual calling.
In VOIP module, user can arrange any VoIP service that he/her prefers or has subscribed to.When mobile module does not have SIM card time, pattern that router is in " this locality ".In such a mode, PMR equipment is a common landline telephone and VOIP phone.The travelling process of user is as follows (but being certainly not limited to this):
1., when user escape to other countries or area, he/her is placed in mobile telephone module his/her SIM card, and this will open " tourism " pattern in router automatically.
2. when s/he arrives another country or local, he/her (as: connects) telephone number (mobile phone or the base number of telling his/her use of router in some way by the phone of router, in this case, also VOIP can be used to serve, because increasing service provides PC to the possible ways of mobile phone) or VOIP account (when there being people to call out him/her, if VOIP service exists, therefore the calling of PC a to PC here can be used for connecting PMR equipment and user).Meanwhile, he/her arranges router in " abroad " pattern.
3., if he/her goes to another country or local, router is set to " tourism " pattern by again.
4. if he/her turns back to country or the place of his/her, he/her takes out his/her SIM card, and router recovers " this locality " pattern (this also can occur automatically), otherwise turns back to step 2.
It should be noted that all in above process " setting " operation can be perform in advance, or to be connected by phone or the ISP of router provides that a possible website performs.
In view of setting above, when anyone is with his/her mobile calls user, the flow process of router process calling as shown in Figure 3.
When router receive one squeeze into phone time, the current state (user sets in advance) according to self responds, and when " during the journey " state, at present on the road, and telephone message is carried out in prompting for response is squeezed into phone by it person user; When " abroad " state, it will attempt connecting subscribers participating in the preassigned mode of user, if connected, allow squeeze into phone person and user's communication, otherwise prompting squeezes into phone, and person user cannot connect at present, and telephone message be carried out in prompting at once.
Can be clear that, in this case, this router can provide an answering machine (when user is at whilst on tour, the message of caller can be pre-configured by user) or incoming call circuit to the circuit (base, mobile phone or VoIP account) of the current use of user.Route Selection occurs, so calling subscriber cannot follow the tracks of user at this hour at PMR device interior.
On the other hand, when user wants another landline telephone or the mobile phone calling out home position, he first can call landline telephone module (or VOIP module) on the router.Router will work on by the flow process shown in Fig. 4.
When router receive one squeeze into phone time, inquiry squeezes into phone, and whether person calls out fixed line, if it is the connection with fixed line is directly set up, otherwise by verified users (squeeze into phone must must be correct from the password of reserved telephone number or key entry), successful words then allow to squeeze into phone, and person keys in destination phone numbers calls out.
By like this, user can save expensive wandering fee, the phone of called one side also can show the identity (because usual identity is relevant with telephone number) of user.PMR equipment can as a landline telephone or networking telephone proper communication in addition.
As us previously discussed, PMR equipment is also a kind of telephone answering machine for mobile subscriber.Use phone to connect or VOIP connects, user can hear other people message.
PMR website can be constructed further.Each PMR user can apply for that an account configures accounts information in PMR equipment on the site.After this, user can not only configure his PMR equipment by account, also can manage all information with effective method more directly perceived.
Second embodiment: portable voip equipment PVD
PVD equipment is the individual VOIP router of user, allows user to utilize cheap VOIP communication.It comprises landline telephone module, control & interconnecting modules, and VOIP module.
Fig. 6 shows, when user carries out the processing procedure of calling out by PVD equipment.When user is at whilst on tour, before leaving hotel, he can connect PVD equipment on telephone wire (landline telephone module) and network cover socket (VOIP module).Then this locality movement arranging him in PVD equipment can call out landline telephone, and this calling will be shifted away.
When router receive one squeeze into phone time, judge to squeeze into phone whether from reserved telephone number, if words then dialed the destination phone numbers of key entry by VOIP network, then provide direct call after successful connection.On the other hand, when no matter VOIP module receive calling, and this locality being sent to user by landline telephone module is all moved by it.
PVD equipment also as the counterparty of PMR equipment citation form, can receive from the calling of PMR equipment or provides route by the landline telephone far module in PVD equipment to the phone from another PMR equipment.A PMR equipment and a PVD equipment can work one to one, in whole calling procedure, therefore do not need checking.
Fig. 7 illustrates the example that first is specialized application.This example provides first and second SIM card port for connecting a different SIM card.PMR can provide the access of multi-section mobile phone to forward accordingly, suitable SIM card can also be selected to dial other mobile phone according to the demand of user.
The citation form of PMR equipment presented hereinbefore and PVD equipment are mainly designed by the people of often tourism.But PMR equipment is not limited in above-described citation form and PVD equipment both of these case.In different situations, citation form can also have more change:
1. a PMR equipment has multiple mobile module, with the SIM card of different supplier.When user is by router call, PMR equipment selects suitable SIM card to complete calling automatically.The call rate of supplier will be a kind of possible choice criteria.
2. mobile telephone module also can substitute by landline telephone module.No matter which kind of situation, company personnel from calling customer Anywhere, and can show identical number in client.This is particularly suitable for little company, because in this case, they do not need themselves telephony switching gear of installation and maintenance.
3. video, SMS(SMS (Short Message Service)), MMS(Multimedia Message Service) also can be added in citation form and above-mentioned change.
Protection scope of the present invention is not limited to the above embodiments, and obviously, those skilled in the art can carry out various change and distortion to the present invention and not depart from the scope of the present invention and spirit.If these are changed and distortion belongs in the scope of the claims in the present invention and equivalent technologies thereof, then the intent of the present invention also comprises these changes and distortion.

Claims (10)

1. a personal call router, the telephone network services that this call router uses the first and the second dissimilar provides telephone communication between user and remote parties, it is characterized in that this call router comprises:
First telephone network interface, this first telephone network interface is combined with the telephone network services of the first type, sets up the first communication link by the first telephone network services and user;
Second telephone network interface, this second telephone network interface is combined with the telephone network services of the second type, sets up second communication link by the second telephone network services and remote parties;
Control and interconnect module, wherein the first telephone network interface is with the second telephone network interface for route carries out telecommunication, and wherein the first telephone network interface and the second telephone network interface are two different in following three types interface:
Landline telephone type telephone network interface;
Based on the telephone network interface of internet voice protocol type;
Or cellular telephone transceiver, is applicable to the telephone network of cellular-type, there is a SIM card port;
Personal call router with multiple SIM card interface, can make it possible to support that the access of multiple mobile phone forwards.
2. personal call router according to claim 1, is characterized in that: have at least one to be cellular telephone transceiver in the first telephone network interface and the second telephone network interface;
First telephone network interface and the second telephone network interface and to control and interconnect module is arranged in same shell to form a complete equipment.
3. personal call router according to claim 1, it is characterized in that: described personal call router allows that user is long-range to answer and get the phone relevant with SIM card, SIM card is different from the physical location of user, first telephone network interface selects from landline telephone type telephone network interface and the telephone network interface based on internet voice protocol type, and the second telephone network interface is the mobile cellular telephone transceiver having SIM card.
4. personal call router according to claim 1, it is characterized in that: also comprise a memory, for storing the user profile that user locates the first telephone network services business, make third party directly can relate to the phone of user the first telephone network services business from the second telephone network;
Described personal call router can judge whether the phone accessed by the first network interface is the user profile coming from memory storage;
Use the user profile stored, be established to user locates phone the first talking link connection the first telephone network services business.
5. personal call router according to claim 1, is characterized in that:
Control to control the first telephone network interface with interconnect module, in response to the third party's remote phone from the second telephone network interface, be established to the first talking link connection that user locates phone the first telephone network services business, make it possible to communicate with third party's remote phone;
Controlling to be connected with the first talking link that interconnect module responds unsuccessfully, realize telephone answering service, to leave a message information for recording the third party received by the second telephone network interface.
6. personal call router according to claim 1, is characterized in that:
When can be placed into the operator scheme of " noncontact ", control can not to attempt to set up the first above-mentioned talking link with interconnect module in this mode and be connected;
When described personal call router runs the operator scheme of " noncontact ", control can be configured to realize telephone answering service with interconnect module, and record the distal information received by the second telephone network interface.
7. personal call router according to claim 6, is characterized in that:
Control to be configured to process management port with interconnect module, make the information of user's energy telemanagement record;
Control to respond with interconnect module the phone made at user first telephone network interface, dial target phone at the second telephone network interface, and two calls are combined, realize the communication of user and target phone;
Control to need to obtain target phone information from the phone of user with the configuration of interconnect module, and use this target phone information to set up new call by the second telephone network interface.
8. personal call router according to claim 7, is characterized in that:
The call information that second telephone network interface provides is consistent with the address of the second telephone network interface in the telephone network services of the second type.
9. form a telephonic communication system by two covers personal call router described above, second interface of first place's equipment is connected to the telephone network services business of type identical with the first interface of the second equipment; In first equipment, first interface is from base formula telephone network interface, and second is internet voice telephone network interface; In second equipment, first interface is internet voice telephone network interface, and second interface is the honeycomb mobile converter with SIM card port, for receiving mobile phone.
10. the method relating to telephone communications between user and remote port, is characterized in that comprising the following steps:
A () provides in the place away from user and remote port and user-dependent personal call router, this personal call router comprises the first telephone network interface, for being connected to the telephone network services of the first type; Second telephone network interface, this second telephone network interface is combined with the telephone network services of the second type;
B () sets up the first communication link by the telephone network services of the first type between user and equipment;
C () before step (b) or afterwards, by the telephone network services of the second type, sets up second communication link between remote parties and equipment;
D () connects the first communication link and the first communication link on personal call router, wherein the first telephone network interface and the second telephone network interface are different, are selected from two different in following three types interface: landline telephone type telephone network interface; Based on the telephone network interface of internet voice protocol type; Or cellular telephone transceiver, is applicable to the telephone network of cellular-type, there is a SIM card port.
CN201410776787.0A 2014-12-15 2014-12-15 Personal telephone router and communication method Pending CN104468378A (en)

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WO2019222406A1 (en) * 2018-05-15 2019-11-21 Uber Technologies, Inc. Network service for dynamic selection of voice communication medium for call connections

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CN102014358A (en) * 2010-12-15 2011-04-13 西南交通大学 Telephone agent device based on voice over internet protocol (VoIP) technology and call making and answering method by telephone agent device
CN103369161A (en) * 2013-08-06 2013-10-23 北京品视电子技术有限公司 Implementation method and system for communication by using intelligent roaming terminal
CN103475794A (en) * 2013-09-09 2013-12-25 成都蜀维通科技有限公司 Communication system based on VoIP/IM technique and roaming communication method of communication system

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102014358A (en) * 2010-12-15 2011-04-13 西南交通大学 Telephone agent device based on voice over internet protocol (VoIP) technology and call making and answering method by telephone agent device
CN103369161A (en) * 2013-08-06 2013-10-23 北京品视电子技术有限公司 Implementation method and system for communication by using intelligent roaming terminal
CN103475794A (en) * 2013-09-09 2013-12-25 成都蜀维通科技有限公司 Communication system based on VoIP/IM technique and roaming communication method of communication system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019222406A1 (en) * 2018-05-15 2019-11-21 Uber Technologies, Inc. Network service for dynamic selection of voice communication medium for call connections
US10887465B2 (en) 2018-05-15 2021-01-05 Uber Technologies, Inc. Network service for dynamic selection of voice communication medium for call connections

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Application publication date: 20150325