Systems, methods, and computer program products for providing a manual ring-down communication line using session initiation protocol
First Claim
1. A method for providing a manual ring-down communication line using Session Initiation Protocol (SIP), comprising the steps of:
- transmitting, by a session establisher SIP user agent to a second SIP user agent over an Internet Protocol (IP) network, an INVITE message;
receiving, by the session establisher SIP user agent from the second SIP user agent, an acknowledgment message transmitted in response to the INVITE message, thereby establishing a private line SIP session, wherein the private line SIP session provides a manual ring-down communication line;
re-establishing, by the session establisher SIP user agent, the private line SIP session after a session failure;
determining, by the session establisher SIP user agent, that a signal key associated with a first communication device has been selected;
transmitting, by the session establisher SIP user agent to the second SIP user agent over the IP network, a start event message to cause a second communication device to activate an alert;
determining, by the session establisher SIP user agent, that the signal key associated with the first communication device has been released; and
transmitting, by the session establisher SIP user agent to the second SIP user agent over the IP network, an end event message to cause the second communication device to deactivate the alert.
15 Assignments
0 Petitions
Accused Products
Abstract
Systems, methods, and computer program products are provided for manual ring-down communication using Session Initiation Protocol (SIP). A first SIP user agent transmits a message to a second SIP user agent over an Internet Protocol (IP) network to establish a SIP session. The first SIP user agent determines that a signal key associated with a first communication device has been selected and transmits, to the second SIP user agent over the IP network, a start event message to cause a second communication device to activate an alert. The first SIP user agent determines that the signal key has been released and transmits over the IP network an end event message to deactivate the alert. The first SIP user agent transmits, to the second SIP user agent over the IP network, one or more subsequent INVITE messages at a predetermined repetition rate to refresh the SIP session.
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Citations
15 Claims
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1. A method for providing a manual ring-down communication line using Session Initiation Protocol (SIP), comprising the steps of:
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transmitting, by a session establisher SIP user agent to a second SIP user agent over an Internet Protocol (IP) network, an INVITE message; receiving, by the session establisher SIP user agent from the second SIP user agent, an acknowledgment message transmitted in response to the INVITE message, thereby establishing a private line SIP session, wherein the private line SIP session provides a manual ring-down communication line; re-establishing, by the session establisher SIP user agent, the private line SIP session after a session failure; determining, by the session establisher SIP user agent, that a signal key associated with a first communication device has been selected; transmitting, by the session establisher SIP user agent to the second SIP user agent over the IP network, a start event message to cause a second communication device to activate an alert; determining, by the session establisher SIP user agent, that the signal key associated with the first communication device has been released; and transmitting, by the session establisher SIP user agent to the second SIP user agent over the IP network, an end event message to cause the second communication device to deactivate the alert. - View Dependent Claims (2, 3, 4, 5)
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6. A non-transitory computer-readable medium having stored thereon sequences of instructions, the sequences of instructions including instructions, which, when executed by a computer system, cause the computer system to:
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transmit, by a session establisher Session Initiation Protocol (SIP) user agent to a second SIP user agent over an Internet Protocol (IP) network, an INVITE message; receive, by the session establisher SIP user agent from the second SIP user agent, an acknowledgment message transmitted in response to the INVITE message, thereby establishing a private line SIP session, wherein the private line SIP session provides a manual ring-down communication line; re-establish, by the session establisher SIP user agent, the private line SIP session after a session failure; determine, by the session establisher SIP user agent, that a signal key associated with a first communication device has been selected; transmit, by the session establisher SIP user agent to the second SIP user agent over the IP network, a start event message to cause a second communication device to activate an alert; determine, by the session establisher SIP user agent, that the signal key associated with the first communication device has been released; and transmit, by the session establisher SIP user agent to the second SIP user agent over the IP network, an end event message to cause the second communication device to deactivate the alert. - View Dependent Claims (7, 8, 9, 10)
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11. A manual ring-down private line communication system, the system comprising:
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a first communication device communicatively coupled to an IP network by way of a session establisher Session Initiation Protocol (SIP) user agent, wherein the session establisher SIP user agent is configured to; transmit, to a second SIP user agent over the IP network, an INVITE message, receive, from the second SIP user agent, an acknowledgment message transmitted in response to the INVITE message, thereby establishing a private line SIP session, wherein the private line SIP session provides a manual ring-down communication line, re-establish the private line SIP session after a session failure, determine that a signal key associated with a first communication device has been selected, transmit, to the second SIP user agent over the IP network, a start event message to cause a second communication device to activate an alert, determine that the signal key associated with the first communication device has been released, and transmit, to the second SIP user agent over the IP network, an end event message to cause the second communication device to deactivate the alert; and the second communication device communicatively coupled to the IP network by way of the second SIP user agent, wherein the second SIP user agent is configured to; receive, over the IP network, the INVITE message and transmit an acknowledgment message in response to the INVITE message. - View Dependent Claims (12, 13, 14, 15)
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Specification