Call setup using voice over the internet protocol (VoIP)
First Claim
1. A method of performing call setup through a packet switched data network for a call originated at a first telephony network toward a second telephony network, the packet switched data network connecting the first telephony network to the second telephony network, the method comprising:
- sending, by an originating gateway of the packet switched data network, an H.323 protocol-based Admission_Request (ARQ) to an origination point signaling controller;
receiving, by the originating gateway and in response to the sending of the ARQ, an H.323 protocol-based Admission_Confirmation (ACF) from the origination point signaling controller;
receiving, by the originating gateway, an indicator from the origination point signaling controller;
in response to receiving the indicator, holding the ACF at the originating gateway such that a holding occurs of the call setup of the call through the packet switched data network, wherein the indicator indicates that the call is headed to an SS7 network, and wherein the holding of the ACF at the originating gateway is further based on the call being headed to the SS7 network; and
implementing the call setup for the call within the packet switched data network via an H.323 protocol, there being no communication path for the call through the packet switched data network prior thereto.
1 Assignment
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Accused Products
Abstract
A method of performing call setup in a system comprises an origination telephony network, a termination telephony network and a packet switched data network interconnecting therebetween comprises steps of implementing call setup across the two telephony networks by SS7 protocol and implementing call setup within the packet switched data network by H.323 protocol. In particular, the call setup in the data network is not started until information of the resources status in the termination telephony network is available. A novel gateway is provided to implement the method, which comprises both SS7 capabilities and H.323 functionalities.
5 Citations
14 Claims
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1. A method of performing call setup through a packet switched data network for a call originated at a first telephony network toward a second telephony network, the packet switched data network connecting the first telephony network to the second telephony network, the method comprising:
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sending, by an originating gateway of the packet switched data network, an H.323 protocol-based Admission_Request (ARQ) to an origination point signaling controller; receiving, by the originating gateway and in response to the sending of the ARQ, an H.323 protocol-based Admission_Confirmation (ACF) from the origination point signaling controller; receiving, by the originating gateway, an indicator from the origination point signaling controller; in response to receiving the indicator, holding the ACF at the originating gateway such that a holding occurs of the call setup of the call through the packet switched data network, wherein the indicator indicates that the call is headed to an SS7 network, and wherein the holding of the ACF at the originating gateway is further based on the call being headed to the SS7 network; and implementing the call setup for the call within the packet switched data network via an H.323 protocol, there being no communication path for the call through the packet switched data network prior thereto. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of performing call setup through a packet switched data network for a call originated at a first telephony network toward a second telephony network, the packet switched data network connecting the first telephony network to the second telephony network, the method comprising:
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sending, by an originating gateway of the packet switched data network, an H.323 protocol-based Admission_Request (ARQ) to an origination point signaling controller; receiving, by the originating gateway and in response to the sending of the ARQ, an H.323 protocol-based Admission_Confirmation (ACF) from the origination point signaling controller; determining, by the originating gateway, whether to transmit call setup messages to a termination point signaling controller of the packet switched data network, via an out-of-band signaling network or via the packet switched data network; based on determining that the call setup messages are to be transmitted via the out-of-band signaling network, holding the ACF at the originating gateway such that a holding occurs of the call setup of the call through the packet switched data network, wherein the holding of the ACF at the originating gateway is further based on the call being headed to an SS7 network; and implementing the call setup for the call within the packet switched data network via an H.323 protocol, there being no communication path for the call through the packet switched data network prior thereto. - View Dependent Claims (11, 12, 13)
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14. A method of performing call setup through a packet switched data network for a call originated at a first telephony network toward a second telephony network, the packet switched data network connecting the first telephony network to the second telephony network, the method comprising:
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sending, by an originating gateway of the packet switched data network, multiple H.323 protocol-based Admission Requests (ARQ) in parallel with one other; receiving, by the originating gateway and in response to the sending of one of the multiple ARQs, a first-received H.323 protocol-based Admission_Confirmation (ACF) from an origination point signaling controller; receiving, by the originating gateway, an indicator from the origination point signaling controller and corresponding to the first-received ACF; in response to receiving the indicator, holding the first-received ACF at the originating gateway such that a holding occurs of the call setup of the call through the packet switched data network, wherein the indicator indicates that the call is headed to an SS7 network, and wherein the holding of the first-received ACF at the originating gateway is further based on the call being headed to the SS7 network; and implementing the call setup for the call within the packet switched data network via an H.323 protocol, there being no communication path for the call through the packet switched data network prior thereto, wherein the call setup is with a terminating gateway of the packet switched data network, the terminating gateway having a destination Internet Protocol (IP) address that is specified in the first-received ACF.
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Specification