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9-1-1 Switched access system

Telephonic communications – Emergency or alarm communications – Central office responsive to emergency call or alarm
Patent

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Adaption of emergency calls to the emergency services...

Telephonic communications – Emergency or alarm communications – Central office responsive to emergency call or alarm
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Advanced port-based E911 strategy for IP telephony

Telephonic communications – Emergency or alarm communications – Central office responsive to emergency call or alarm
Reexamination Certificate

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Advanced port-based E911 strategy for IP telephony

Telephonic communications – Emergency or alarm communications – Central office responsive to emergency call or alarm
Reexamination Certificate

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Advanced port-based E911 strategy for IP telephony

Telephonic communications – Emergency or alarm communications – Central office responsive to emergency call or alarm
Reexamination Certificate

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Apparatus and method for E911 detection and callback monitoring

Telephonic communications – Emergency or alarm communications – Central office responsive to emergency call or alarm
Reexamination Certificate

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Apparatus and method for identifying a calling station

Telephonic communications – Emergency or alarm communications – Central office responsive to emergency call or alarm
Patent

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Apparatus and method for intelligent call routing and call...

Telephonic communications – Emergency or alarm communications – Central office responsive to emergency call or alarm
Reexamination Certificate

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Apparatus and method for intelligent call routing and call...

Telephonic communications – Emergency or alarm communications – Central office responsive to emergency call or alarm
Reexamination Certificate

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Apparatus for locating a station initiating transmission of...

Telephonic communications – Emergency or alarm communications – Central office responsive to emergency call or alarm
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Apparatus for locating a station initiating transmission of...

Telephonic communications – Emergency or alarm communications – Central office responsive to emergency call or alarm
Reexamination Certificate

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Apparatus, and associated method, for facilitating routing...

Telephonic communications – Emergency or alarm communications – Central office responsive to emergency call or alarm
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Arrangement for communicating between public safety answering po

Telephonic communications – Emergency or alarm communications – Central office responsive to emergency call or alarm
Patent

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Arrangement for public safety answering points

Telephonic communications – Emergency or alarm communications – Central office responsive to emergency call or alarm
Patent

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Assisted personal communication system and method

Telephonic communications – Emergency or alarm communications – Central office responsive to emergency call or alarm
Reexamination Certificate

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Automated parallel and redundant subscriber contact and...

Telephonic communications – Emergency or alarm communications – Central office responsive to emergency call or alarm
Reexamination Certificate

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Automated parallel and redundant subscriber contact and...

Telephonic communications – Emergency or alarm communications – Central office responsive to emergency call or alarm
Reexamination Certificate

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Automated parallel and redundant subscriber contact and...

Telephonic communications – Emergency or alarm communications – Central office responsive to emergency call or alarm
Reexamination Certificate

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Automated third party call activated when 911 dialed

Telephonic communications – Emergency or alarm communications – Central office responsive to emergency call or alarm
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Automatic location identification (ALI) emergency services...

Telephonic communications – Emergency or alarm communications – Central office responsive to emergency call or alarm
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