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VoIP Emergency Calling Support
Telcordia Contacts:Nadine Abbott(732) [email protected] Reese(732) [email protected] Akundi(732) [email protected]
An SAIC Company
Provided to support discussions in the NENA VoIP Migratory WG
March 23, 2004
VoIP Migration (Intermediate) Proposal – nbaTelcordia Technologies Proprietary - Internal use only. See proprietary restrictions on title page.
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Population of Routing Location Databases for VoIPMSAG is populated with routing addresses (e.g., [email protected]) for each ESZ/ESN. Location Gateway Server (LGS) is configured with ESRN to ESQK mappings for each ESN it serves. SRDB is populated with ESQK to ESN/PSAP mappings. ALI DB is populated with ESQK to LGS mappings.
PSAPE9-1-1 Selective RouterUser
Agent/ IP
device ESGW
DHCP
ESQK = Emergency Services Query Key (associated with LGS & PSAP)ESRN = Emergency Services Routing Number/Information (non-
dialable), e.g., npa911xxxx or npa511xxxx.
SRDB
ALI DB
DBMS
MSAG
VoIP domainEmergency Services
Provider NetworkCall server
LGSESZESRN{ESQKs}
ESQK ESN
ESQK<=>LGS
LIS ESNESRN
VoIP Migration (Intermediate) Proposal – nbaTelcordia Technologies Proprietary - Internal use only. See proprietary restrictions on title page.
3
VoIP Location ValidationVoIP Location Information Server (LIS) requests validation of location objects against MSAG and obtains routing information for the associated Emergency Services Gateway (ESGW)/PSAP.
PSAPE9-1-1 Selective Router
User Agent/
IP device
ESGW
DHCP
LO = geographic or civil location object ESRN = Emergency Services Routing Number/Information (non-
dialable), e.g., npa911xxxx, for routing to ESGW (and to identify PSAP)
ESGW = Emergency Services Gateway
1. Location validation request (LO)
SRDB
ALI DB
DBMS
MSAG2. LO1
3. us.st.ESRN4. Location validation response (us.st.ESRN)
VoIP domain Emergency Services Provider Network
Call server
LGS
LIS
VoIP Migration (Intermediate) Proposal – nbaTelcordia Technologies Proprietary - Internal use only. See proprietary restrictions on title page.
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User Agent populated with VoIP LocationOne example of DHCP assisted download of Location Object to User Agent/IP device. Includes routing information to get to ESGW for appropriate Selective Router/PSAP.
PSAPE9-1-1 Selective Router
User Agent/
IP device
ESGW
DHCP
2. Stores LO &
1. LO and [email protected] LGS
SRDB
ALI DB
DBMSMSAG
VoIP domain Emergency Services Provider Network
Call server
DHCP = Dynamic Host Configuration Protocol serverLIS = Location Information ServerLO = geographic or civil location object
LIS
VoIP Migration (Intermediate) Proposal – nbaTelcordia Technologies Proprietary - Internal use only. See proprietary restrictions on title page.
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VoIP Emergency CallSee notes page.
PSAP
E9-1-1 Selective
Router
UA or IP device
ESGW
LGS
SRDB
ALI DB
VoIP domain(s)Emergency Services
Provider NetworkCall
server
1. VoIP Call Setup([email protected],
client ID, LO)
2. VoIP Call Setup([email protected],
tel.url*, LO)
ESGW = Emergency Services Gateway (signaling and media)
LGS = Location Gateway ServerESQK = Emergency Services Query
Key
3. CBN*, LO, ESRN, VoIP
Provider ID(s) or History
5. Call Setup(Cd=ESRN, Cg=ESQK)
* Call server & ESGW must map “client ID” to a valid
Call Back Number
6. ESQK
7. ESQK4. ESQK
8. ESQK
9. CBN, LO, VoIP Provider ID(s) or
History?
10. CBN, LO, VoIP Provider ID(s) or History?
LIS
VoIP Migration (Intermediate) Proposal – nbaTelcordia Technologies Proprietary - Internal use only. See proprietary restrictions on title page.
6
Alternative Scenario: VoIP Emergency Calls with LIS Assist to Obtain LO & Routing
Includes query to LIS for LO and routing information. See notes page.
PSAP
E9-1-1 Selective
Router
UA or IP device
ESGW
LGS
SRDB
ALI DB
2. Query (client ID)
3. Response (LO, [email protected].
ESRN)
VoIP domain(s)Emergency Services
Provider NetworkCall
server
1. VoIP Call Setup(sos@domain, client
ID, LIS ID)
4. VoIP Call Setup([email protected],
tel.url*, LO)
ESGW = Emergency Services Gateway (signaling and media)
LGS = Location Gateway ServerESQK = Emergency Services Query
Key
5. CBN*, LO, ESRN, , VoIP
Provider ID(s) or History
7. Call Setup(Cd=ESRN, Cg=ESQK)
* Call server & ESGW must map “client ID” to a valid
Call Back Number
8. ESQK
9. ESQK6. ESQK
10. ESQK
11. CBN, LO, VoIP Provider
ID(s) or History?
12. CBN, LO, VoIP Provider ID(s) or
History?LIS
VoIP Migration (Intermediate) Proposal – nbaTelcordia Technologies Proprietary - Internal use only. See proprietary restrictions on title page.
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VoIP Location Validation & CBN UpdatesVoIP Location Information Server (LIS) requests validation of location objects against MSAG and obtains routing information for the associated Emergency Services Gateway (ESGW)/PSAP. LIS sends location updates for local CBNs.
PSAPE9-1-1 Selective Router
User Agent/
IP device
ESGW
DHCP
CBN = Call Back NumberLO = geographic or civil location object ESRN = Emergency Services Routing Number/Information (non-
dialable), e.g., npa911xxxx, for routing to ESGW (and to identify PSAP)
1. Loc. Valid. request (LO)
SRDBALI DB
DBMS
MSAG2.LO1
3. us.st.ESRN
4. Loc. valid. resp. (us.st.ESRN)
VoIP domain Emergency Services Provider NetworkCall server
LIS5. Location updates (CBN, LO)
6. Loc. update. resp. (success)
7.CBN, ESN
8.CBN, ESN
