WO2006104459A1 - Voice over internet protocol system and method - Google Patents

Voice over internet protocol system and method Download PDF

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Publication number
WO2006104459A1
WO2006104459A1 PCT/SG2005/000101 SG2005000101W WO2006104459A1 WO 2006104459 A1 WO2006104459 A1 WO 2006104459A1 SG 2005000101 W SG2005000101 W SG 2005000101W WO 2006104459 A1 WO2006104459 A1 WO 2006104459A1
Authority
WO
WIPO (PCT)
Prior art keywords
session initiation
initiation protocol
call
internet protocol
voice over
Prior art date
Application number
PCT/SG2005/000101
Other languages
French (fr)
Inventor
How Boon Tan
Original Assignee
Singapore Telecommunications Limited
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Singapore Telecommunications Limited filed Critical Singapore Telecommunications Limited
Priority to PCT/SG2005/000101 priority Critical patent/WO2006104459A1/en
Publication of WO2006104459A1 publication Critical patent/WO2006104459A1/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00—Network architectures or network communication protocols for network security
    • H04L63/08—Network architectures or network communication protocols for network security for authentication of entities
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00—Network architectures or network communication protocols for network security
    • H04L63/08—Network architectures or network communication protocols for network security for authentication of entities
    • H04L63/0884—Network architectures or network communication protocols for network security for authentication of entities by delegation of authentication, e.g. a proxy authenticates an entity to be authenticated on behalf of this entity vis-à-vis an authentication entity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/1066—Session management
    • H04L65/1069—Session establishment or de-establishment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M15/00—Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M15/00—Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP
    • H04M15/10—Metering calls from calling party, i.e. A-party charged for the communication
    • H04M15/12—Discriminative metering, charging or billing
    • H04M15/18—Discriminative metering, charging or billing according to duration of the call, or the communication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M15/00—Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP
    • H04M15/56—Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP for VoIP communications
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M15/00—Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP
    • H04M15/82—Criteria or parameters used for performing billing operations
    • H04M15/8207—Time based data metric aspects, e.g. VoIP or circuit switched packet data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/38—Graded-service arrangements, i.e. some subscribers prevented from establishing certain connections
    • H04M3/382—Graded-service arrangements, i.e. some subscribers prevented from establishing certain connections using authorisation codes or passwords
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M7/00—Arrangements for interconnection between switching centres
    • H04M7/12—Arrangements for interconnection between switching centres for working between exchanges having different types of switching equipment, e.g. power-driven and step by step or decimal and non-decimal
    • H04M7/1205—Arrangements for interconnection between switching centres for working between exchanges having different types of switching equipment, e.g. power-driven and step by step or decimal and non-decimal where the types of switching equipement comprises PSTN/ISDN equipment and switching equipment of networks other than PSTN/ISDN, e.g. Internet Protocol networks
    • H04M7/126—Interworking of session control protocols
    • H04M7/127—Interworking of session control protocols where the session control protocols comprise SIP and SS7
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M2215/00—Metering arrangements; Time controlling arrangements; Time indicating arrangements
    • H04M2215/20—Technology dependant metering
    • H04M2215/202—VoIP; Packet switched telephony
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M2215/00—Metering arrangements; Time controlling arrangements; Time indicating arrangements
    • H04M2215/78—Metric aspects
    • H04M2215/7813—Time based data, e.g. VoIP or circuit switched packet data

Definitions

  • This invention relates to a method of connecting a Voice Over Internet Protocol ("VOIP”) call to a traditional Public Switched Telephone Network (“PSTN”).
  • VOIP Voice Over Internet Protocol
  • PSTN Public Switched Telephone Network
  • Session Initiation Protocol Session Initiation Protocol
  • Session Initiation Protocol is described in RFC3261 as an "application-layer control protocol that can establish, modify, and terminate multimedia sessions (conferences) such as Internet telephony calls”.
  • the Session Initiation Protocol does not however provide for the use of prepaid termination of Voice Over Internet Protocol calls to the switched telephone network. In particular there is no method to allow one stage connection, authentication and prepayment of the termination.
  • the present invention consists in a method of connecting a Voice Over Internet Protocol call with a Public Switched Telephone Network including the steps of:
  • Session Initiation Protocol further extracting from said Session Initiation Protocol invite a subscribers Session Initiation Protocol number, said Session Initiation Protocol proxies Internet Protocol address and said Session Initiation Protocol proxies Fully Qualified Domain Name;
  • Protocol proxies Internet Protocol address and Session Initiation Protocol proxies Fully Qualified Domain Name with previously stored data; and connecting said Voice Over Internet Protocol and Public Switched Telephone Network if said comparisons match and said extracted subscribers Session Initiation Protocol number has an associated monetary credit.
  • said method further including the steps of:
  • said method further including the step of accounting for the cost of the call and deducting said cost from said associated monetary credit.
  • said method further including the step of terminating said call if user has no associated monetary credit left.
  • the present invention consists in a system for connecting a Voice Over Internet Protocol call with a Public Switched Telephone Network including:
  • Session Initiation Protocol invite a subscribers Session Initiation Protocol number, said Session Initiation Protocol proxies Internet Protocol address and said Session Initiation Protocol proxies Fully Qualified Domain Name;
  • said system further including:
  • said system further including means for accounting for the cost of the call and deducting said cost from said associated monetary credit.
  • said system further including means for terminating said call if user has no associated monetary credit left.
  • the present invention consists in software for affecting the above methods. In a fourth embodiment, the present invention consists in storage media containing software affecting the above methods.
  • This invention may also be said broadly to consist in the parts, elements and features referred to or indicated in the specification of the application, individually or collectively, and any or all combinations of any two or more of said parts, elements or features, and where specific integers are mentioned herein which have known equivalents in the art to which this invention relates, such known equivalents are deemed to be incorporated herein as if individually set forth.
  • Figure 1 is a schematic illustration of the system of the present invention
  • FIG. 2 is a flow diagram of the steps carried out by the system and method of the present invention.
  • Figure 3 is an example of a Session Initiation Protocol invite packet as used by the present invention.
  • the present invention relates to the provision of Public Switched Telephone Network interconnection services with Voice Over Internet Protocol calling networks.
  • a user using a Session Initiation Protocol user agent lOlof some sort, typically an Internet Protocol network connectable telephone, or analogue adapter connects in the usual manner to a Session Initiation Protocol proxy server 102. This would typically be a Voice Over Internet Protocol service provider.
  • the user authenticates in the usual manner as provided for in RFC3261. In order to authenticate the user will typically be provided with a unique password.
  • Once authenticated the call is passed to the system of the present invention 103.
  • the connection device of the present invention 103 will then on connect the call to a Public Switched Telephone Network 105.
  • the connection device of the present invention 103 will either include or have access to a data store 104, which allows for data such as authentication data and monetary balances to be stored.
  • the data store 104 may be connected to the connecting device 103 over a network.
  • the interconnecting device 103 is connected to Internet Protocol networks and to the Public Switched Telephone Network.
  • the interconnecting device 103 of the present invention can be implemented using a computer including at least one processor, memory, input and output devices, storage and network connectivity devices. Alternatively embedded processors could be used to implement the device of the present invention. Devices such as Internet Telephony switches or suitably programmed personal computers, which include support for the Session Initiation Protocol, would be suitable
  • the call process is as follows; the user using a user agent lOlauthenticates 201 to a Session Initiation Protocol proxy 102.
  • the Session Initiation Protocol proxy checks the authentication 202 and sends an invite message 203 to the system 103.
  • the invite message includes information provided by the user when the user initiates the session with the proxy.
  • a sample invite message is shown in Figure 3.
  • the system 103 receives the invite 204 and extracts information 205.
  • the extracted information includes referring to Figure 3 the access code 305 and destination telephone number 306 from the proxies 102 invite "To" header field. Additionally the system 103 extracts the originating subscriber Session Initiation Protocol number 304, Voice Over Internet Protocol providers Session
  • the connecting system 103 then checks that the Session Initiation Protocol proxies Internet Protocol address 311 is valid, the address having been previously added to the systems data store.
  • the connecting system 103 then authenticates 206 the subscriber/user 101 using the subscribers Session Initiation Protocol number 310 and the previously obtained Session Initiation Protocol proxies Internet Protocol address 311 and Fully Qualified Domain Name 304. These having been previously stored for authentication in the systems 103 data store 104.
  • further authentication is performed using the Public Switched Telephone Network access code 305 obtained from the proxies invite "To" header field 312.
  • the connecting system 103 using a network accessible accounting database or checking with a network connected call accounting system the system 103 will check if the subscriber 101 has sufficient credit 207 and if so 210 connect the call 211.
  • the system 103 will use the originating subscriber Session Initiation Protocol number 310.
  • the call charges are deducted from the subscribers credit by calculating the charge based on the destination number. If there is insufficient credit 208 the call is terminated 209 by the system 103.
  • the call is terminated once the users credit has been used.
  • the system 103 calculates the calling charges incurred and if these exceed the users credit the call is terminated.
  • the user is provided with a prompts to enable the user to increase their credit using for example a credit card during the call.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Computer Security & Cryptography (AREA)
  • Computer Hardware Design (AREA)
  • Computing Systems (AREA)
  • General Engineering & Computer Science (AREA)
  • Business, Economics & Management (AREA)
  • General Business, Economics & Management (AREA)
  • Multimedia (AREA)
  • Meter Arrangements (AREA)

Abstract

A system and method for connecting a Voice Over Internet Protocol call with a Public Switched Telephone Network in one stage, are described. The system and method includes receiving a Session Initiation Protocol invite from a Session Initiation Protocol proxy (204), extracting from the Session Initiation Protocol invite access and destination codes (205), further extracting from the Session Initiation Protocol invite a subscriber's Session Initiation Protocol number, the Session Initiation Protocol proxies Internet Protocol address and the Session Initiation Protocol proxies Fully Qualified Domain Name. The system and method also includes authenticating (206) Voice Over Internet Protocol caller by comparing the extracted subscriber's Session Initiation Protocol number, Session Initiation Protocol proxies Internet Protocol address and the Session Initiation Protocol proxies Fully Qualified Domain Name with previously stored data and further authenticating the call by comparing the extracted access code with previously stored data. The Voice Over Internet Protocol and Public Switched Telephone Network are connected if the comparisons match and the extracted subscriber's Session Initiation Protocol number has an associated monetary credit (209). The system and method also include accounting for the cost of the call and deducting the cost from the associated monetary credit (212).

Description

VOICE OVER INTERNET PROTOCOL SYSTEM AND METHOD
FIELD OF THE INVENTION
This invention relates to a method of connecting a Voice Over Internet Protocol ("VOIP") call to a traditional Public Switched Telephone Network ("PSTN"). In particular to a system and method allowing one stage connection, authentication and prepayment for the interconnection using the Session Initiation Protocol ("Session Initiation Protocol ").
BACKGROUND
The Session Initiation Protocol ("SIP") is described in RFC3261 as an "application-layer control protocol that can establish, modify, and terminate multimedia sessions (conferences) such as Internet telephony calls".
The Session Initiation Protocol does not however provide for the use of prepaid termination of Voice Over Internet Protocol calls to the switched telephone network. In particular there is no method to allow one stage connection, authentication and prepayment of the termination.
Present systems require that a user authenticate to a Session Initiation Protocol service provider then authenticate to the prepaid or postpaid provider of termination services. This is usually done using at least one and usually two codes provided on a prepaid card. It would be desirable to provide a system and method allowing one stage connection, authentication and prepayment for connection to the public switched telephone network to avoid the need to authenticate more than once. SUMMARY OF THE INVENTION
It is an object of the present invention to overcome the above disadvantages or at least provide the public or industry with useful choice.
It is a further object of the present invention to provide a system and method allowing one stage connection, authentication and prepayment for the termination of a Voice Over Internet Protocol call with the Public Switched Telephone Network.
Accordingly in a first embodiment, the present invention consists in a method of connecting a Voice Over Internet Protocol call with a Public Switched Telephone Network including the steps of:
receiving a Session Initiation Protocol invite from a Session Initiation Protocol proxy;
extracting from said Session Initiation Protocol invite call destination codes;
further extracting from said Session Initiation Protocol invite a subscribers Session Initiation Protocol number, said Session Initiation Protocol proxies Internet Protocol address and said Session Initiation Protocol proxies Fully Qualified Domain Name;
authenticating Voice Over Internet Protocol caller by comparing said extracted subscribers Session Initiation Protocol number, Session Initiation
Protocol proxies Internet Protocol address and Session Initiation Protocol proxies Fully Qualified Domain Name with previously stored data; and connecting said Voice Over Internet Protocol and Public Switched Telephone Network if said comparisons match and said extracted subscribers Session Initiation Protocol number has an associated monetary credit.
Preferably said method further including the steps of:
extracting from said Session Initiation Protocol invite an access code; and
further authenticating said call by comparing said extracted access code with previously stored data.
Preferably said method further including the step of accounting for the cost of the call and deducting said cost from said associated monetary credit.
Preferably said method further including the step of terminating said call if user has no associated monetary credit left.
In a second embodiment, the present invention consists in a system for connecting a Voice Over Internet Protocol call with a Public Switched Telephone Network including:
means for receiving a Session Initiation Protocol invite from a Session Initiation Protocol proxy;
means for extracting from said Session Initiation Protocol invite call destination codes;
means for further extracting from said Session Initiation Protocol invite a subscribers Session Initiation Protocol number, said Session Initiation Protocol proxies Internet Protocol address and said Session Initiation Protocol proxies Fully Qualified Domain Name;
means for authenticating Voice Over Internet Protocol caller by comparing said extracted subscribers Session Initiation Protocol number, Session Initiation Protocol proxies Internet Protocol address and Session
Initiation Protocol proxies Fully Qualified Domain Name with previously stored data; and
means for connecting said Voice Over Internet Protocol and Public Switched Telephone Network if said comparisons match and said extracted subscribers Session Initiation Protocol number has an associated monetary credit.
Preferably said system further including:
means for extracting from said Session Initiation Protocol invite an access code; and
means for further authenticating said call by comparing said extracted access code with previously stored data.
Preferably said system further including means for accounting for the cost of the call and deducting said cost from said associated monetary credit.
Preferably said system further including means for terminating said call if user has no associated monetary credit left.
In a third embodiment, the present invention consists in software for affecting the above methods. In a fourth embodiment, the present invention consists in storage media containing software affecting the above methods.
This invention may also be said broadly to consist in the parts, elements and features referred to or indicated in the specification of the application, individually or collectively, and any or all combinations of any two or more of said parts, elements or features, and where specific integers are mentioned herein which have known equivalents in the art to which this invention relates, such known equivalents are deemed to be incorporated herein as if individually set forth.
BRIEF DESCRIPTION OF DRAWINGS
A Voice Over Internet Protocol and Public Switched Telephone Network connecting system and method will be described with reference to the accompanying drawings in which: -
Figure 1 is a schematic illustration of the system of the present invention;
Figure 2 is a flow diagram of the steps carried out by the system and method of the present invention; and
Figure 3 is an example of a Session Initiation Protocol invite packet as used by the present invention.
DETAILED DESCRIPTION OF THE INVENTION
Referring to Figure 1 the present invention relates to the provision of Public Switched Telephone Network interconnection services with Voice Over Internet Protocol calling networks. A user using a Session Initiation Protocol user agent lOlof some sort, typically an Internet Protocol network connectable telephone, or analogue adapter connects in the usual manner to a Session Initiation Protocol proxy server 102. This would typically be a Voice Over Internet Protocol service provider. The user authenticates in the usual manner as provided for in RFC3261. In order to authenticate the user will typically be provided with a unique password. Once authenticated the call is passed to the system of the present invention 103. The connection device of the present invention 103 will then on connect the call to a Public Switched Telephone Network 105. The connection device of the present invention 103 will either include or have access to a data store 104, which allows for data such as authentication data and monetary balances to be stored. The data store 104 may be connected to the connecting device 103 over a network.
The interconnecting device 103 is connected to Internet Protocol networks and to the Public Switched Telephone Network. The interconnecting device 103 of the present invention can be implemented using a computer including at least one processor, memory, input and output devices, storage and network connectivity devices. Alternatively embedded processors could be used to implement the device of the present invention. Devices such as Internet Telephony switches or suitably programmed personal computers, which include support for the Session Initiation Protocol, would be suitable
Referring to Figure 2 the call process is as follows; the user using a user agent lOlauthenticates 201 to a Session Initiation Protocol proxy 102. The Session Initiation Protocol proxy checks the authentication 202 and sends an invite message 203 to the system 103. The invite message includes information provided by the user when the user initiates the session with the proxy. A sample invite message is shown in Figure 3. The system 103 receives the invite 204 and extracts information 205. The extracted information includes referring to Figure 3 the access code 305 and destination telephone number 306 from the proxies 102 invite "To" header field. Additionally the system 103 extracts the originating subscriber Session Initiation Protocol number 304, Voice Over Internet Protocol providers Session
Initiation Protocol proxy Internet Protocol address 311 and the Fully Qualified Domain Name 307.
The connecting system 103 then checks that the Session Initiation Protocol proxies Internet Protocol address 311 is valid, the address having been previously added to the systems data store. The connecting system 103 then authenticates 206 the subscriber/user 101 using the subscribers Session Initiation Protocol number 310 and the previously obtained Session Initiation Protocol proxies Internet Protocol address 311 and Fully Qualified Domain Name 304. These having been previously stored for authentication in the systems 103 data store 104.
In an alternative embodiment further authentication is performed using the Public Switched Telephone Network access code 305 obtained from the proxies invite "To" header field 312.
If authentication is successful the connecting system 103 using a network accessible accounting database or checking with a network connected call accounting system the system 103 will check if the subscriber 101 has sufficient credit 207 and if so 210 connect the call 211.
To check if there is sufficient credit the system 103 will use the originating subscriber Session Initiation Protocol number 310. Preferably the call charges are deducted from the subscribers credit by calculating the charge based on the destination number. If there is insufficient credit 208 the call is terminated 209 by the system 103.
Further in an alternative embodiment the call is terminated once the users credit has been used. In order to do this, the system 103 calculates the calling charges incurred and if these exceed the users credit the call is terminated. In a further alternative embodiment the user is provided with a prompts to enable the user to increase their credit using for example a credit card during the call.
The foregoing description of the preferred embodiment of the invention has been presented for purposes of illustration and description. It is not intended to be exhaustive or to limit the invention to the precise forms disclosed, since many modifications or variations thereof are possible in the light of the above teaching. All such modifications and variations are within the scope of the invention. The embodiments described herein were chosen and described in order best to explain the principles of the invention and its practical application, thereby to enable others skilled in the art to utilise the invention in various embodiments and with various modifications as are suited to the particular use contemplated thereof. It is intended that the scope of the invention be defined by the claims appended hereto, when interpreted in accordance with the full breadth to which they are legally and equitably suited.

Claims

1. A method of connecting a Voice Over Internet Protocol call with a Public Switched Telephone Network including the steps of:
receiving a Session Initiation Protocol invite from a Session Initiation Protocol proxy;
extracting from said Session Initiation Protocol invite call destination codes;
further extracting from said Session Initiation Protocol invite a subscribers Session Initiation Protocol number, said Session Initiation Protocol proxies Internet Protocol address and said Session Initiation Protocol proxies
Fully Qualified Domain Name;
authenticating Voice Over Internet Protocol caller by comparing said extracted subscribers Session Initiation Protocol number, Session Initiation Protocol proxies Internet Protocol address and Session Initiation Protocol proxies Fully Qualified Domain Name with previously stored data; and
connecting said Voice Over Internet Protocol and Public Switched Telephone Network if said comparisons match and said extracted subscribers Session Initiation Protocol number has an associated monetary credit.
2. A method of connecting a Voice Over Internet Protocol call with a Public Switched Telephone Network as claimed in claim 1 further including the steps of: extracting from said Session Initiation Protocol invite an access code; and
further authenticating said call by comparing said extracted access code with previously stored data.
3. A method of connecting a Voice Over Internet Protocol call with a
Public Switched Telephone Network as claimed in claim 1 or claim 2 further including the step of accounting for the cost of the call and deducting said cost from said associated monetary credit.
4. A method of connecting a Voice Over Internet Protocol call with a Public Switched Telephone Network as claimed in claim 3 further including the step of terminating said call if user has no associated monetary credit left.
5. A system for connecting a Voice Over Internet Protocol call with a Public Switched Telephone Network including:
means for receiving a Session Initiation Protocol invite from a Session Initiation Protocol proxy;
means for extracting from said Session Initiation Protocol invite call destination codes;
means for further extracting from said Session Initiation Protocol invite a subscribers Session Initiation Protocol number, said Session Initiation Protocol proxies Internet Protocol address and said Session Initiation Protocol proxies Fully Qualified Domain Name;
means for authenticating Voice Over Internet Protocol caller by comparing said extracted subscribers Session Initiation Protocol number, Session Initiation Protocol proxies Internet Protocol address and Session Initiation Protocol proxies Fully Qualified Domain Name with previously stored data; and
means for connecting said Voice Over Internet Protocol and Public Switched Telephone Network if said comparisons match and said extracted subscribers Session Initiation Protocol number has an associated monetary credit.
6. A system for connecting a Voice Over Internet Protocol call with a Public Switched Telephone Network as claimed in claim 5 further including:
means for extracting from said Session Initiation Protocol invite an access code; and
means for further authenticating said call by comparing said extracted access code with previously stored data.
7. A system for connecting a Voice Over Internet Protocol call with a Public Switched Telephone Network as claimed in claim 5 or claim 6 further including means for accounting for the cost of the call and deducting said cost from said associated monetary credit.
8. A system for connecting a Voice Over Internet Protocol call with a Public Switched Telephone Network as claimed in claim 7 further including means for terminating said call if user has no associated monetary credit left.
9. Software for affecting the method of any one of claims 1 to 4.
10. Storage media containing software for affecting the method of any one of claims 1 to 4.
PCT/SG2005/000101 2005-03-29 2005-03-29 Voice over internet protocol system and method WO2006104459A1 (en)

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WO2008052290A1 (en) * 2006-11-03 2008-05-08 Intelliguard I.T. Pty Ltd A session process and system
WO2008073780A2 (en) * 2006-12-12 2008-06-19 Qualcomm Incorporated Systems and methods for caller identification customization and remote management of communication devices
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WO2002023851A2 (en) * 2000-09-11 2002-03-21 Vectone Limited Voice-over internet protocol
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Cited By (7)

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Publication number Priority date Publication date Assignee Title
US8515066B2 (en) 2000-02-04 2013-08-20 Ntt Communications Corporation Method, apparatus and program for establishing encrypted communication channel between apparatuses
GB2438273A (en) * 2003-11-04 2007-11-21 Ntt Comm Corp Secure communications system wherein the source URI in a received message is cross checked with the source IP address/IPSec SA
GB2438273B (en) * 2003-11-04 2008-02-13 Ntt Comm Corp Method,apparatus and program for establishing encrypted communication channel between apparatuses
WO2008052290A1 (en) * 2006-11-03 2008-05-08 Intelliguard I.T. Pty Ltd A session process and system
WO2008073780A2 (en) * 2006-12-12 2008-06-19 Qualcomm Incorporated Systems and methods for caller identification customization and remote management of communication devices
WO2008073780A3 (en) * 2006-12-12 2008-08-07 Qualcomm Inc Systems and methods for caller identification customization and remote management of communication devices
US9148431B2 (en) 2006-12-12 2015-09-29 Qualcomm Incorporated Systems and methods for caller identification customization and remote management of communication devices

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