Interrogating Call Session Control Function
E545185
Interrogating Call Session Control Function is a core IMS network element that serves as the initial contact point for SIP signaling, handling routing, registration queries, and interaction with subscriber databases in IP-based telephony systems.
Statements (45)
| Predicate | Object |
|---|---|
| instanceOf |
Call Session Control Function
ⓘ
IMS network element ⓘ |
| abbreviation | I-CSCF NERFINISHED ⓘ |
| accessesDatabase |
HSS
NERFINISHED
ⓘ
Home Subscriber Server NERFINISHED ⓘ |
| belongsToLayer | control plane of IMS ⓘ |
| definedInStandard | 3GPP IMS specifications NERFINISHED ⓘ |
| function |
handles initial SIP requests entering an operator’s IMS network
ⓘ
hides internal network topology from external networks ⓘ interacts with subscriber databases ⓘ performs registration-related queries ⓘ performs routing based on called and calling party information ⓘ routes SIP signaling to appropriate IMS entities ⓘ selects appropriate Serving Call Session Control Function ⓘ supports interconnection between different operator networks ⓘ supports load balancing among S-CSCFs ⓘ supports roaming scenarios in IMS ⓘ supports security and screening of incoming SIP messages ⓘ |
| interface |
Cx interface to HSS
ⓘ
Dx interface to SLF ⓘ Mw interface to other CSCFs ⓘ |
| networkRole |
border entry point for SIP signaling into an operator’s IMS domain
ⓘ
topology hiding function for IMS core ⓘ |
| operatesIn |
5G core IMS deployments
ⓘ
IP-based telephony systems ⓘ LTE and 4G IMS architectures ⓘ Next Generation Networks NERFINISHED ⓘ |
| partOf |
IMS core network
ⓘ
IP Multimedia Subsystem NERFINISHED ⓘ |
| performs |
SIP header analysis for routing decisions
ⓘ
SIP message routing based on ENUM or DNS resolution ⓘ screening of incoming SIP requests from other networks ⓘ |
| primaryRole | initial contact point for SIP signaling ⓘ |
| relatedTo |
Proxy Call Session Control Function
NERFINISHED
ⓘ
Serving Call Session Control Function ⓘ |
| standardizedBy |
3GPP
NERFINISHED
ⓘ
3rd Generation Partnership Project NERFINISHED ⓘ |
| supportsService |
VoIP over IMS
ⓘ
VoLTE NERFINISHED ⓘ VoWiFi ⓘ multimedia telephony services ⓘ |
| technologyDomain |
IP multimedia communications
ⓘ
telecommunications ⓘ |
| usesProtocol |
SIP
ⓘ
Session Initiation Protocol NERFINISHED ⓘ |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.