Methods and apparatus for transmitting accurate emergency location identification numbers (ELINs) after an emergency caller disconnects
First Claim
1. A method for transmitting an emergency location identification number (ELIN) and/or callback number for an analog or digital telephonic device from which an emergency call was made, from customer premises equipment (CPE) to a public safety answering point (PSAP) after an emergency call goes on-hook, said method comprising the steps of:
- a) upon initiation of an emergency call, storing ELIN and/or callback number in a buffer at the CPE;
b) upon detecting an on-book event at the telephonic device from which the emergency call was made, autonomously transmitting the ELIN and/or callback number from the buffer to the PSAP prior to disconnecting the call at the PBX/MLTS.
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Accused Products
Abstract
The invention is directed to methods (and corresponding apparatus) for accurate transmission of an ELIN/callback number from an emergency caller after the emergency call goes on-hook. The methods include (upon initiation of an emergency call) the steps of storing an emergency location identification number and/or callback number in a buffer; and, upon detecting an on-hook event, transmitting the ELIN and/or callback number from the buffer. According to a preferred embodiment of the invention, the emergency call is disconnected after said step of transmitting; and prior to said step of transmitting, optionally first over private network and to the public network PSAP, a timer is initiated. The step of disconnecting is performed after the timer expires.
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Citations
18 Claims
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1. A method for transmitting an emergency location identification number (ELIN) and/or callback number for an analog or digital telephonic device from which an emergency call was made, from customer premises equipment (CPE) to a public safety answering point (PSAP) after an emergency call goes on-hook, said method comprising the steps of:
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a) upon initiation of an emergency call, storing ELIN and/or callback number in a buffer at the CPE;
b) upon detecting an on-book event at the telephonic device from which the emergency call was made, autonomously transmitting the ELIN and/or callback number from the buffer to the PSAP prior to disconnecting the call at the PBX/MLTS. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An apparatus for transmitting an emergency location identification number (ELIN) and/or callback number for an analog or digital telephonic device from which an emergency call was made, from customer premises equipment (CPE) to a public safety answering point (PSAP) after an emergency call goes on-hook, said apparatus comprising:
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a) storage means at the CPE for storing an ELIN and/or callback number upon initiation of an emergency call;
b) transmitting means at the CPE coupled to said storage means for autonomously transmitting the stored ELIN and/or callback number to the PSAP upon detecting an on-hook event at the telephonic device from which the emergency call was made, prior to disconnecting the call at the PBX/MLTS. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification