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.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Interrogating Call Session Control Function canonical | 2 |
| Interrogating-Call Session Control Function | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T5771157 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Interrogating Call Session Control Function Context triple: [I-CSCF, fullName, Interrogating Call Session Control Function]
-
A.
Session Initiation Protocol
Session Initiation Protocol (SIP) is a signaling protocol used to establish, modify, and terminate real-time communication sessions such as voice and video calls over IP networks.
-
B.
IP Multimedia Subsystem
IP Multimedia Subsystem is a standardized architectural framework used by telecommunications networks to deliver IP-based multimedia services such as voice, video, and messaging over both fixed and mobile infrastructures.
-
C.
S‑CSCF
S‑CSCF (Serving Call Session Control Function) is a core IMS network element that handles session control, registration, and service invocation for subscribers in IP-based multimedia networks.
-
D.
H.248
H.248 is an ITU-T protocol, also known as Megaco, used for controlling media gateways in next-generation and IP multimedia networks.
-
E.
SS7
SS7 (Signaling System No. 7) is a global telecommunications signaling protocol suite used to set up and manage telephone calls, SMS, and other network services across public switched telephone networks.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Interrogating Call Session Control Function Target entity description: 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.
-
A.
Session Initiation Protocol
Session Initiation Protocol (SIP) is a signaling protocol used to establish, modify, and terminate real-time communication sessions such as voice and video calls over IP networks.
-
B.
IP Multimedia Subsystem
IP Multimedia Subsystem is a standardized architectural framework used by telecommunications networks to deliver IP-based multimedia services such as voice, video, and messaging over both fixed and mobile infrastructures.
-
C.
S‑CSCF
S‑CSCF (Serving Call Session Control Function) is a core IMS network element that handles session control, registration, and service invocation for subscribers in IP-based multimedia networks.
-
D.
H.248
H.248 is an ITU-T protocol, also known as Megaco, used for controlling media gateways in next-generation and IP multimedia networks.
-
E.
SS7
SS7 (Signaling System No. 7) is a global telecommunications signaling protocol suite used to set up and manage telephone calls, SMS, and other network services across public switched telephone networks.
- F. None of above. chosen
Statements (45)
| Predicate | Object |
|---|---|
| instanceOf |
Call Session Control Function
ⓘ
IMS network element ⓘ |
| abbreviation |
I-CSCF
ⓘ
linked to:
I‑CSCF
|
| accessesDatabase |
HSS
ⓘ
Home Subscriber Server ⓘ |
| belongsToLayer | control plane of IMS ⓘ |
| definedInStandard | 3GPP IMS specifications ⓘ |
| 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 ⓘ
linked to:
Next Generation Network architectures
|
| partOf |
IMS core network
ⓘ
IP Multimedia Subsystem ⓘ |
| 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
ⓘ
linked to:
Call Session Control Function
Serving Call Session Control Function ⓘ |
| standardizedBy |
3GPP
ⓘ
3rd Generation Partnership Project ⓘ |
| supportsService |
VoIP over IMS
ⓘ
VoLTE ⓘ VoWiFi ⓘ multimedia telephony services ⓘ |
| technologyDomain |
IP multimedia communications
ⓘ
telecommunications ⓘ |
| usesProtocol |
SIP
ⓘ
Session Initiation Protocol ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Interrogating Call Session Control Function Description of subject: 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.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Interrogating Call Session Control Function