Systems and methods for serving VolP emergency calls
First Claim
1. A system for serving VoIP emergency calls, said system comprising:
- apparatus operable for receiving a VoIP emergency call accompanied by a user identifier (ID) identifying the user of said user ID;
said apparatus being operable for assigning a temporary directory number (TDN) to said user ID;
a first memory for storing said user ID and said assigned TDN;
said apparatus being operable to extend said VoIP emergency call and said assigned TDN to an emergency services center; and
said apparatus is operable for reestablishing said VoIP emergency call if dropped by using said assigned TDN and said user ID to establish a call between said emergency services center and said user identified by said user ID.
1 Assignment
0 Petitions
Accused Products
Abstract
Systems and methods are disclosed for serving VoIP emergency calls. In one embodiment, a call control entity is placed between PSAPs of an emergency services network and the IP network transporting VoIP calls. When the call control entity receives a VoIP emergency call and its associated user ID, the call control entity assigns a TDN to the emergency call and associates the assigned TDN to the user ID. The emergency call and the TDN are then extended to a PSAP to handle the emergency call. If the emergency call is disconnected from the PSAP, the PSAP operator is able to dial the TDN to provide a call-back function. The call control entity receives the call-back attempt to the TDN from the PSAP, identifies the user ID associated with the TDN, and routes the call-back attempt to the user ID to reestablish a call between the PSAP and the user.
143 Citations
20 Claims
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1. A system for serving VoIP emergency calls, said system comprising:
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apparatus operable for receiving a VoIP emergency call accompanied by a user identifier (ID) identifying the user of said user ID;
said apparatus being operable for assigning a temporary directory number (TDN) to said user ID;
a first memory for storing said user ID and said assigned TDN;
said apparatus being operable to extend said VoIP emergency call and said assigned TDN to an emergency services center; and
said apparatus is operable for reestablishing said VoIP emergency call if dropped by using said assigned TDN and said user ID to establish a call between said emergency services center and said user identified by said user ID. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of operating a system for serving VoIP emergency calls, said method comprising the steps of:
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receiving a VoIP emergency call accompanied by a user identifier (ID) identifying the user of said user ID;
assigning a temporary directory number (TDN) to said user ID;
storing said user ID and said assigned TDN;
extending said VoIP emergency call and said assigned TDN to an emergency services center;
receiving a call-back attempt including said assigned TDN from said emergency services center in response to a dropping of said VoIP emergency call; and
establishing a call between said emergency services center and said user identified by said user ID by using said assigned TDN and said user ID. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. A method for serving VoIP emergency calls originated by calling stations identified by a user identifier (ID), said method comprising the steps of:
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operating a call control entity (CCE) to receive a VoIP emergency call accompanied by a user ID representing a user for said user ID;
assigning a temporary directory number (TDN) to said user ID;
storing said assigned TDN and said user ID in a first memory;
extending said VoIP emergency call and said assigned TDN to an emergency services center; and
operating said call control entity upon receipt of a call-back attempt including said assigned TDN from said emergency services center for establishing a call between said emergency services center and said user identified by said user ID by using said assigned TDN and said user ID. - View Dependent Claims (20)
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Specification