telia/nortel pre-spirits implementation
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Telia/Nortel Telia/Nortel Pre-SPIRITS implementationPre-SPIRITS implementation
Telia/Nortel Telia/Nortel Pre-SPIRITS implementationPre-SPIRITS implementation
Sören NyckelgårdSören Nyckelgård Telia Research ABTelia Research AB
soren.m.nyckelgard@telia.se
Using SIP to bridge between old and new
The “SPIRITS server” The “SPIRITS server” The “SPIRITS server” The “SPIRITS server”
Users’ SIP-enabled services
““Signaling Control Gateway”Signaling Control Gateway” SS7-IP Protocol Converter
PSTN
ISDN
GSM
INAPISUP
MAP SIP
IP cloud
““Interconnector” Interconnector” E.164 databaseE.164 database SIP redirect (Number Portability)
SIP proxy (Service Router)
SIP
... is a Protocol Converter and a SIP Server.
PBX cluster
QSIG
Signaling Flow ExampleSignaling Flow Example
PSTN
INAP: IDPINAP: IDP SIP: INVITESIP: INVITE
(A)SIP: 301 MovedSIP: 301 MovedSIP: 301 MovedSIP: 301 MovedINAP: CONINAP: CON
SIP: 404 Not FoundSIP: 404 Not FoundINAP: CUEINAP: CUE SIP: 404 Not FoundSIP: 404 Not Found
Interconnector Interconnector E.164 databaseE.164 database Redirect : Number PortabilityProxy : Service Router
Signaling Control Signaling Control GatewayGateway
SS7-IP Protocol Converter
Service Service based on a SIP redirect server
(B)
or
SIP: INVITESIP: INVITE
GSM
ISDN
PSTN
CharacteristicsCharacteristics• No new protocolsNo new protocols
• No changes to existing networks No changes to existing networks except reconfigurationsexcept reconfigurations
• No media via MG unless one of No media via MG unless one of the endpoints is IP-homedthe endpoints is IP-homed
• Number PortabilityNumber Portability– bunus feature or first application– globally and between networks
• Services Services – globally distributive– need only to support SIP– SCN terminals appear as SIP clients– multi-network services
IPcloud
service
service
service
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