CA2487656A1 - Emergency call handling in a voice-over-packet environment - Google Patents
Emergency call handling in a voice-over-packet environment Download PDFInfo
- Publication number
- CA2487656A1 CA2487656A1 CA002487656A CA2487656A CA2487656A1 CA 2487656 A1 CA2487656 A1 CA 2487656A1 CA 002487656 A CA002487656 A CA 002487656A CA 2487656 A CA2487656 A CA 2487656A CA 2487656 A1 CA2487656 A1 CA 2487656A1
- Authority
- CA
- Canada
- Prior art keywords
- call
- emergency
- directory number
- emergency call
- routing
- Prior art date
- Legal status (The legal status 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 status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 claims abstract 8
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/42—Systems providing special services or facilities to subscribers
- H04M3/50—Centralised arrangements for answering calls; Centralised arrangements for recording messages for absent or busy subscribers ; Centralised arrangements for recording messages
- H04M3/51—Centralised call answering arrangements requiring operator intervention, e.g. call or contact centers for telemarketing
- H04M3/5116—Centralised call answering arrangements requiring operator intervention, e.g. call or contact centers for telemarketing for emergency applications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
- H04M11/04—Telephonic communication systems specially adapted for combination with other electrical systems with alarm systems, e.g. fire, police or burglar alarm systems
-
- 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
- H04M7/128—Details of addressing, directories or routing tables
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/64—Hybrid switching systems
- H04L12/6418—Hybrid transport
- H04L2012/6481—Speech, voice
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M2242/00—Special services or facilities
- H04M2242/14—Special services or facilities with services dependent on location
Abstract
A method of routing an emergency call received at a network element. The method comprises determining a directory number associated with a communication device having originated the emergency call, consulting a local database to obtain routing information associated with the directory number, and directing the call and the routing information over a path dedicated to emergency calls. Also, a network element which comprises the database as well as a control entity, the control entity being operative for receiving an incoming call originated by one of the communication devices, determining the directory number associated with the communication device having originated the call, determining whether the call is an emergency call and, responsive to the call being an emergency call, accessing the database to obtain the routing information related to the directory number and directing the call as well as the routing information over a trunk group dedicated to emergency calls.
Claims (25)
1. A method of routing an emergency call received at a network element, comprising:
~ determining a directory number associated with a communication device having originated the emergency call;
~ consulting a local database to obtain routing information associated with the directory number; and ~ directing the call and the routing information over a path dedicated to emergency calls.
~ determining a directory number associated with a communication device having originated the emergency call;
~ consulting a local database to obtain routing information associated with the directory number; and ~ directing the call and the routing information over a path dedicated to emergency calls.
2. The method defined in claim 1, wherein the path dedicated to emergency calls includes a virtual trunk group.
3. The method defined in claim 1, wherein the path dedicated to emergency calls comprises dedicated circuit-switched lines.
4. The method defined in claim 2, wherein the path dedicated to emergency calls further comprises dedicated circuit-switched lines.
5. A network element for use in a network that provides voice-over-packet services to a plurality of communication devices, each of the communication devices being associated with a respective directory number, the network element comprising:
~ a database that relates routing keys to respective directory numbers;
~ a control entity operative for:
~ receiving an incoming call originated by one of the communication devices;
~ determining the directory number associated with the communication device having originated the call;
~ determining whether the call is an emergency call;
~ responsive to the call being an emergency call:
(i) accessing the database to obtain the routing key related to the directory number; and (ii) directing the call and the routing key obtained at (i) over a trunk group dedicated to emergency calls.
~ a database that relates routing keys to respective directory numbers;
~ a control entity operative for:
~ receiving an incoming call originated by one of the communication devices;
~ determining the directory number associated with the communication device having originated the call;
~ determining whether the call is an emergency call;
~ responsive to the call being an emergency call:
(i) accessing the database to obtain the routing key related to the directory number; and (ii) directing the call and the routing key obtained at (i) over a trunk group dedicated to emergency calls.
6. The network element defined in claim 5, wherein the trunk group dedicated to emergency calls is a virtual trunk group.
7. The network element defined in claim 5, wherein the control entity being operative to determine whether the call is an emergency call comprises the control entity being operative to determine whether a set of leading digits have been dialed.
8. The network element defined in claim 5, wherein the control entity being operative to determine whether the call is an emergency call comprises the control entity being operative to determine whether the set of leading digits is selected from the group consisting of "9-1-1 ", "1-1-2" and "9-9-9".
9. The network element of claim 5 being a packet switch.
10. The network element of claim 5 being a softswitch.
11. The network element of claim 5 being a multimedia communication server (MCS).
12. The network element defined in claim 5, wherein the network element is connected to a plurality of public safety answering points (PSAPs) via a dedicated emergency network, wherein the routing key related to a particular directory number associated with a particular communication device defines a route to a particular one of the PSAPs.
13. A network architecture for providing voice-over-packet services to a plurality of communication devices, each of the communication devices being associated with a respective directory number, the network architecture comprising:
(a) a packet switch;
(b) a gateway connected to the packet switch and connectable to a circuit-switched emergency network;
(c) a database that relates individual directory numbers to respective routing keys;
(d) wherein the packet switch is operative for:
~ receiving an incoming emergency call from one of the communication devices;
~ determining the directory number associated with the communication device having placed the emergency call;
~ accessing the database to obtain the routing key related to the directory number determined in the previous step;
~ directing the emergency call, the associated directory number and the associated routing key towards the gateway.
(a) a packet switch;
(b) a gateway connected to the packet switch and connectable to a circuit-switched emergency network;
(c) a database that relates individual directory numbers to respective routing keys;
(d) wherein the packet switch is operative for:
~ receiving an incoming emergency call from one of the communication devices;
~ determining the directory number associated with the communication device having placed the emergency call;
~ accessing the database to obtain the routing key related to the directory number determined in the previous step;
~ directing the emergency call, the associated directory number and the associated routing key towards the gateway.
14. The network architecture defined in claim 13, wherein directing the emergency call towards the gateway is performed over a trunk group dedicated to emergency calls.
15. The network architecture defined in claim 14, wherein the trunk group dedicated to emergency calls is a virtual trunk group.
16. The network architecture defined in claim 15, the gateway being operative for:
~ receiving the incoming emergency call, the associated directory number and the associated routing key from the packet switch;
~ determining an emergency telephone number in the circuit-switched emergency network on the basis of the received routing key;
~ directing the emergency call and the associated directory number towards the emergency telephone number determined in the previous step.
~ receiving the incoming emergency call, the associated directory number and the associated routing key from the packet switch;
~ determining an emergency telephone number in the circuit-switched emergency network on the basis of the received routing key;
~ directing the emergency call and the associated directory number towards the emergency telephone number determined in the previous step.
17. A network architecture for providing voice-over-packet services to a plurality of communication devices, each of the communication devices being associated with a respective directory number, the network architecture comprising:
(a) a packet switch;
(b) a gateway connected to the packet switch and connectable to a circuit-switched emergency network;
(c) a database that relates individual directory numbers to respective routing keys;
(d) wherein the packet switch is operative for:
~ receiving an incoming call originated by one of the communication devices;
~ determining the directory number associated with the communication device having originated the call;
~ determining whether the call is an emergency call;
~ responsive to the call being an emergency call:
(i) accessing the database to obtain the routing key related to the directory number; and (ii) directing the call and the routing key obtained at (i) towards the gateway.
(a) a packet switch;
(b) a gateway connected to the packet switch and connectable to a circuit-switched emergency network;
(c) a database that relates individual directory numbers to respective routing keys;
(d) wherein the packet switch is operative for:
~ receiving an incoming call originated by one of the communication devices;
~ determining the directory number associated with the communication device having originated the call;
~ determining whether the call is an emergency call;
~ responsive to the call being an emergency call:
(i) accessing the database to obtain the routing key related to the directory number; and (ii) directing the call and the routing key obtained at (i) towards the gateway.
18. The network architecture defined in claim 17, wherein directing the emergency call towards the gateway is performed over a trunk group dedicated to emergency calls.
19. The network architecture defined in claim 18, wherein the trunk group dedicated to emergency calls is a virtual trunk group.
20. The network architecture defined in claim 19, the gateway being operative for:
~ receiving the incoming emergency call, the associated directory number and the associated routing key from the packet switch;
~ determining an emergency telephone number in the circuit-switched emergency network on the basis of the received routing key;
~ directing the emergency call and the associated directory number towards the emergency telephone number determined in the previous step.
~ receiving the incoming emergency call, the associated directory number and the associated routing key from the packet switch;
~ determining an emergency telephone number in the circuit-switched emergency network on the basis of the received routing key;
~ directing the emergency call and the associated directory number towards the emergency telephone number determined in the previous step.
21. The network architecture defined in claim 20, wherein the packet switch being operative to determine whether the call is an emergency call comprises the packet switch being operative to determine whether a set of leading digits have been dialed.
22. The network architecture defined in claim 20, wherein the packet switch being operative to determine whether the call is an emergency call comprises the packet switch being operative to determine whether the set of leading digits is selected from the group consisting of "9-1-1 ", "1-1-2" and "9-9-9".
23. The network element defined in claim 20, wherein the routing key related to a particular directory number associated with a particular communication device defines a route to a particular one of the PSAPs.
24. A computer-readable storage medium comprising instructions for execution by a computer to implement a method of routing an emergency call received at a network element, the method comprising:
~ determining a directory number associated with a communication device having originated the emergency call;
~ consulting a local database to obtain routing information associated with the directory number; and ~ directing the call and the routing information over a path dedicated to emergency calls.
~ determining a directory number associated with a communication device having originated the emergency call;
~ consulting a local database to obtain routing information associated with the directory number; and ~ directing the call and the routing information over a path dedicated to emergency calls.
25. A computer-readable storage medium comprising computer-readable program code for execution by a computer in a network element upon receipt of an emergency call, the computer-readable program code comprising:
~ computer-readable program code for determining a directory number associated with a communication device having originated an emergency call;
~ computer-readable program code for consulting a local database to obtain routing information associated with the directory number; and ~ computer-readable program code for directing the call and the routing information over a path dedicated to emergency calls.
~ computer-readable program code for determining a directory number associated with a communication device having originated an emergency call;
~ computer-readable program code for consulting a local database to obtain routing information associated with the directory number; and ~ computer-readable program code for directing the call and the routing information over a path dedicated to emergency calls.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/CA2005/001459 WO2006039783A1 (en) | 2004-10-13 | 2005-09-23 | Emergency services provisioning and emergency call handling in a voice-over-packet environment |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US61765604P | 2004-10-13 | 2004-10-13 | |
US60/617,656 | 2004-10-13 |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2487656A1 true CA2487656A1 (en) | 2006-04-13 |
CA2487656C CA2487656C (en) | 2010-07-13 |
Family
ID=36177426
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA2487700A Active CA2487700C (en) | 2004-10-13 | 2004-11-12 | Provisioning of emergency services in a voice-over-packet environment |
CA2487656A Active CA2487656C (en) | 2004-10-13 | 2004-11-12 | Emergency call handling in a voice-over-packet environment |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA2487700A Active CA2487700C (en) | 2004-10-13 | 2004-11-12 | Provisioning of emergency services in a voice-over-packet environment |
Country Status (2)
Country | Link |
---|---|
US (3) | US7079627B2 (en) |
CA (2) | CA2487700C (en) |
Families Citing this family (58)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8041817B2 (en) | 2000-06-30 | 2011-10-18 | At&T Intellectual Property I, Lp | Anonymous location service for wireless networks |
US7796998B1 (en) * | 2000-08-01 | 2010-09-14 | At&T Intellectual Property, I, L.P. | Method and system for delivery of a calling party's location |
US7110749B2 (en) | 2000-12-19 | 2006-09-19 | Bellsouth Intellectual Property Corporation | Identity blocking service from a wireless service provider |
US7130630B1 (en) | 2000-12-19 | 2006-10-31 | Bellsouth Intellectual Property Corporation | Location query service for wireless networks |
US7085555B2 (en) | 2000-12-19 | 2006-08-01 | Bellsouth Intellectual Property Corporation | Location blocking service from a web advertiser |
US7116977B1 (en) | 2000-12-19 | 2006-10-03 | Bellsouth Intellectual Property Corporation | System and method for using location information to execute an action |
US7224978B2 (en) | 2000-12-19 | 2007-05-29 | Bellsouth Intellectual Property Corporation | Location blocking service from a wireless service provider |
US7428411B2 (en) | 2000-12-19 | 2008-09-23 | At&T Delaware Intellectual Property, Inc. | Location-based security rules |
US7245925B2 (en) | 2000-12-19 | 2007-07-17 | At&T Intellectual Property, Inc. | System and method for using location information to execute an action |
US7181225B1 (en) | 2000-12-19 | 2007-02-20 | Bellsouth Intellectual Property Corporation | System and method for surveying wireless device users by location |
US7662954B2 (en) * | 2001-10-30 | 2010-02-16 | Colorado State University Research Foundation | Outer layer having entanglement of hydrophobic polymer host and hydrophilic polymer guest |
ES2333602T3 (en) * | 2005-01-26 | 2010-02-24 | Alcatel Lucent | PROCEDURE TO ESTABLISH AN EMERGENCY CALL IN A LOCAL, TERMINAL, PASSWAY AND SERVER INFORMATIC NETWORK FOR THE PRACTICE OF THIS PROCEDURE. |
US7917396B1 (en) * | 2005-02-15 | 2011-03-29 | Embarq Holdings Company, Llc | Method and system for processing communications orders |
US7756253B2 (en) * | 2005-02-22 | 2010-07-13 | At&T Intellectual Property Ii, Lp | Methods and systems for providing foreign call back number compatibility for VoIP E9-1-1 calls |
US8798253B2 (en) * | 2005-07-29 | 2014-08-05 | Verizon Patent And Licensing Inc. | Network routing |
US7792275B2 (en) * | 2005-07-29 | 2010-09-07 | Verizon Patent And Licensing Inc. | Application service invocation |
US8234388B2 (en) | 2005-07-29 | 2012-07-31 | Verizon Patent And Licensing Inc. | Application service invocation based on filter criteria |
US7602887B1 (en) * | 2005-09-30 | 2009-10-13 | At&T Corp. | Method and apparatus for using a single local phone number for routing out of area phone numbers |
US7787600B1 (en) * | 2005-10-07 | 2010-08-31 | At&T Mobility Ii, Llc | Handling emergency calls using EAP |
US8824454B2 (en) * | 2005-10-24 | 2014-09-02 | West Corporation | Peering network for parameter-based routing of special number calls |
US20070121803A1 (en) * | 2005-11-01 | 2007-05-31 | Koepke Michael A | System and method for direct subscriber population of emergency services database records |
US7440455B2 (en) * | 2005-12-22 | 2008-10-21 | Level 3 Communications, Llc | Registration of multiple VoIP devices |
US9100237B2 (en) * | 2005-12-22 | 2015-08-04 | At&T Intellectual Property I, L.P. | VoIP 911 address locator service |
US7734021B1 (en) * | 2005-12-31 | 2010-06-08 | At&T Corp. | Method and apparatus for supporting out of area phone number for emergency services |
US20070160036A1 (en) * | 2006-01-10 | 2007-07-12 | Smith David M | Method and system for servicing enhanced 911 calls |
US20070189492A1 (en) * | 2006-01-20 | 2007-08-16 | George Heinrichs | Peering network for parameter-based routing of special number calls |
US20070189467A1 (en) * | 2006-01-31 | 2007-08-16 | Marian Croak | Method and apparatus for bypassing overload control for emergency calls |
US20070177582A1 (en) * | 2006-01-31 | 2007-08-02 | Marian Croak | Method and apparatus for providing network interworking for emergency calls |
US8014341B1 (en) | 2006-05-08 | 2011-09-06 | Embarq Holdings Company, Llc | Method and intermediary device for reporting a civic address during an emergency call |
CA2549285C (en) | 2006-05-26 | 2017-01-31 | Bce Inc | Method, system and apparatus for verifying validity of location information in a packet-switched network |
KR20080002127A (en) * | 2006-06-30 | 2008-01-04 | 삼성전자주식회사 | Mobile communication terminal for sending emergency message using bluetooth module and method the same |
US8077701B2 (en) * | 2006-07-20 | 2011-12-13 | At&T Intellectual Property I, Lp | Systems, methods, and apparatus to prioritize communications in IP multimedia subsystem networks |
US7773975B2 (en) * | 2006-07-28 | 2010-08-10 | West Corporation | Providing an indication of network capabilities to a user for special number calls |
US8064875B2 (en) * | 2006-08-04 | 2011-11-22 | At&T Intellectual Property I, L.P. | Methods and apparatus to update geographic location information associated with internet protocol devices for E-911 emergency services |
ES2532664T3 (en) * | 2006-08-16 | 2015-03-30 | Huawei Technologies Co., Ltd. | Method and apparatus for transmission / reception in emergency services |
US8190753B2 (en) * | 2006-08-28 | 2012-05-29 | Samsung Electronics Co., Ltd. | System and method for protecting emergency response services in telecommunication networks from attack |
US8531995B2 (en) * | 2006-11-01 | 2013-09-10 | At&T Intellectual Property I, L.P. | Systems and methods for location management and emergency support for a voice over internet protocol device |
US20080112512A1 (en) * | 2006-11-15 | 2008-05-15 | Qualcomm Incorporated | Transmitted reference signaling scheme |
US9031207B2 (en) * | 2006-12-18 | 2015-05-12 | Centurylink Intellectual Property Llc | System and method for providing location information for addressed based E-911 calls to public safety answering points |
US8284906B2 (en) * | 2006-12-22 | 2012-10-09 | Rockstar Bidco, LP | Message mapping for forced hold call handling in a VoP environment |
US8620257B2 (en) * | 2007-02-20 | 2013-12-31 | At&T Intellectual Property I, L.P. | Systems and methods for location management and emergency support for a voice over internet protocol device |
US8149269B2 (en) * | 2007-04-10 | 2012-04-03 | West Corporation | Emergency services call delivery from a legacy communications device to a VoIP PSAP |
US8504614B2 (en) * | 2007-06-28 | 2013-08-06 | Verizon Patent And Licensing Inc. | Systems and methods for verification of IP device location |
US8290470B2 (en) * | 2007-08-13 | 2012-10-16 | Centurylink Intellectual Property Llc | System and method for providing location information to a public safety answering point during an emergency 911 call from a WiFi handset |
US8964945B2 (en) | 2007-09-28 | 2015-02-24 | Centurylink Intellectual Property Llc | System and method for providing location based E-911 of network access devices registered with a network gateway |
US20090089184A1 (en) * | 2007-09-28 | 2009-04-02 | Embarq Holdings Company, Llc | Content portal for media distribution |
US8289953B2 (en) | 2007-10-16 | 2012-10-16 | Centurylink Intellectual Property Llc | System and method for providing location information to a public safety answering point during an emergency 911 call from a softphone |
US8254529B2 (en) * | 2008-02-20 | 2012-08-28 | Oldham Eamonn John | Method and apparatus for emergency services number alerting in an internet protocol network |
US8891749B2 (en) * | 2008-02-21 | 2014-11-18 | Centurylink Intellectual Property Llc | System and method for providing emergency wireline telephone services to residences |
US8364117B2 (en) | 2008-02-21 | 2013-01-29 | Centurylink Intellectual Property Llc | System and method for updating location information of voice-over-internet protocol based devices for E911 service |
US8538370B2 (en) * | 2008-07-03 | 2013-09-17 | Centurylink Intellectual Property Llc | Emergency message button and method on a wireless communications device for communicating an emergency message to a public safety answering point (PSAP) |
US8976938B2 (en) * | 2008-07-07 | 2015-03-10 | Centurylink Intellectual Property Llc | Deluxe emergency notification |
US8249019B2 (en) * | 2008-08-26 | 2012-08-21 | Futurewei Technologies, Inc. | System and method for SR-VCC of IMS emergency sessions |
US20120309340A1 (en) | 2011-06-01 | 2012-12-06 | Embarq Holdings Company, Llc | System and method for communicating emergency information through messaging |
US9491307B2 (en) * | 2009-02-24 | 2016-11-08 | Centurylink Intellectual Property Llc | System and method for establishing pre-stored emergency messages |
US9622061B2 (en) | 2014-06-20 | 2017-04-11 | At&T Intellectual Property I, L.P. | Enhanced wireless home phone for an emergency call service network |
US9699635B2 (en) * | 2015-03-31 | 2017-07-04 | Telefonaktiebolaget Lm Ericsson (Publ) | Methods and devices for facilitating emergency calls over wireless communication systems |
US10362631B2 (en) * | 2017-04-03 | 2019-07-23 | Level 3 Communications, Llc | Last resource disaster routing in a telecommunications network |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6292542B1 (en) * | 1999-08-11 | 2001-09-18 | At&T Corp. | Method and apparatus for handling an in-call request for emergency services |
US6678357B2 (en) * | 2001-09-26 | 2004-01-13 | Siemens Information And Communication Networks, Inc. | Internet protocol (IP) emergency connections (ITEC) telephony |
US6771742B2 (en) * | 2001-11-05 | 2004-08-03 | Intrado Inc. | Geographic routing of emergency service call center emergency calls |
US7843934B2 (en) * | 2002-01-08 | 2010-11-30 | Verizon Services Corp. | Methods and apparatus for providing emergency telephone service to IP-based telephone users |
US7330464B2 (en) | 2002-09-25 | 2008-02-12 | Lucent Technologies Inc. | Location identification for IP telephony to support emergency services |
US7539168B2 (en) * | 2003-02-03 | 2009-05-26 | Avaya Inc. | Emergency call handling in contention-based wireless local-area networks |
US7027564B2 (en) * | 2003-09-22 | 2006-04-11 | Foundry Networks, Inc. | System, method and apparatus for supporting E911 emergency services in a data communications network |
US6940950B2 (en) * | 2003-12-19 | 2005-09-06 | Telecommunication Systems, Inc. | Enhanced E911 location information using voice over internet protocol (VoIP) |
US7386111B2 (en) * | 2004-02-10 | 2008-06-10 | Vonage Network Inc. | Method and apparatus for placing a long distance call based on a virtual phone number |
US7177399B2 (en) * | 2004-02-27 | 2007-02-13 | Nortel Network Limited | Determining the geographical location from which an emergency call originates in a packet-based communications network |
US7894406B2 (en) * | 2004-09-30 | 2011-02-22 | Alcatel-Lucent Usa Inc. | System for routing remote VoIP emergency calls |
WO2006039783A1 (en) | 2004-10-13 | 2006-04-20 | Bce Inc. | Emergency services provisioning and emergency call handling in a voice-over-packet environment |
-
2004
- 2004-11-12 US US10/986,365 patent/US7079627B2/en active Active
- 2004-11-12 CA CA2487700A patent/CA2487700C/en active Active
- 2004-11-12 US US10/986,395 patent/US7953209B2/en active Active
- 2004-11-12 CA CA2487656A patent/CA2487656C/en active Active
-
2006
- 2006-06-12 US US11/450,689 patent/US7801282B2/en active Active
Also Published As
Publication number | Publication date |
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US7801282B2 (en) | 2010-09-21 |
US20060077961A1 (en) | 2006-04-13 |
CA2487700C (en) | 2010-03-16 |
US7079627B2 (en) | 2006-07-18 |
CA2487700A1 (en) | 2006-04-13 |
US7953209B2 (en) | 2011-05-31 |
CA2487656C (en) | 2010-07-13 |
US20060078095A1 (en) | 2006-04-13 |
US20060229059A1 (en) | 2006-10-12 |
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