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