emergency calling services (calls for police, fire, ambulance, etc.)

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Emergency Calling Services (Calls for police, fire, ambulance, etc.) SIPPING WG IETF 58 Tom Taylor [email protected]

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Emergency Calling Services (Calls for police, fire, ambulance, etc.). SIPPING WG IETF 58 Tom Taylor [email protected]. Looking at Emergency Calling Service (Calls to police, fire, ambulance, etc.). Call Origin. Emergency Call Centre Location. IP Network. PSTN. PSTN. Legacy. - PowerPoint PPT Presentation

TRANSCRIPT

Page 1: Emergency Calling Services (Calls for police, fire, ambulance, etc.)

Emergency Calling Services(Calls for police, fire, ambulance, etc.)

SIPPING WGIETF 58

Tom [email protected]

Page 2: Emergency Calling Services (Calls for police, fire, ambulance, etc.)

Looking at Emergency Calling Service(Calls to police, fire, ambulance, etc.)

Call Origin

PSTN

SIP Phone

draft-schulzrinne-sipping-sos

Emergency Call Centre Location

PSTN IP Network

Legacy

NOW!

draft-taylor-sipping-emerg-scen

EMERGING

draft-schulzrinne-sipping-emergency-req

Page 3: Emergency Calling Services (Calls for police, fire, ambulance, etc.)

Issues Considered

• Identifying emergency calls– SIP phone or network may have to recognize numbers– universal emergency URI a partial solution– have to distinguish between regular and hearing impaired ECCs in

some jurisdictions• Routing from the SIP phone to the target ECC

– depends on caller location• Presenting caller location at the ECC

– calling party number used to determine caller location– PSTN may determine calling party number based on incoming circuit

• Presenting callback number at the ECC– PSTN gateway may have to provide limited-lifetime number, map back

to non-numeric SIP URI• Holding the caller accountable for the call

– tradeoff: user/device authentication vs. importance of handling emergency

Page 4: Emergency Calling Services (Calls for police, fire, ambulance, etc.)

Possible Solutions Depend On The Application Scenario

abcdefghijkl

PSTNGateway

TargetECC

PSTNGateway

ECC

SIP network

Routed as emergency callRouted as ordinary call

SIP Phone:stationary

vs.nomadic

Emerg.Services

DB

DB DB

Page 5: Emergency Calling Services (Calls for police, fire, ambulance, etc.)

Looking Forward

• Requirement to carry location info in SIP– confidentiality, integrity – applies to call signalling as a whole

– usable by proxies, PSTN gateways for call routing

– may be inserted by SIP phone or by proxy

– ideally, could be constructed by SIP phone based on manual configuration

• hotel room example

• Potential BCP work for devices• Potential BCP work for network operation

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