Call Session Control Function
E524103
The Call Session Control Function (CSCF) is a core IP Multimedia Subsystem (IMS) network element responsible for controlling SIP signaling, managing user sessions, and enforcing service policies in next-generation telecommunication networks.
All labels observed (4)
| Label | Occurrences |
|---|---|
| Call Session Control Function canonical | 4 |
| Proxy Call Session Control Function | 1 |
| Proxy-Call Session Control Function | 1 |
| Serving Call Session Control Function | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T5480572 — 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: Call Session Control Function Context triple: [BGCF, interactsWith, 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.
Policy Control Function
The Policy Control Function (PCF) is a 5G core network element that centralizes policy rules and provides unified policy control for quality of service, access, and charging decisions across the network.
-
C.
Breakout Gateway Control Function
Breakout Gateway Control Function is a core component in IP multimedia networks that selects and routes voice or multimedia sessions from an IP domain to the public switched telephone network (PSTN) or other legacy systems.
-
D.
Switch Control
Switch Control is an accessibility feature that lets users operate a computer using one or more adaptive switches instead of traditional input devices like a keyboard or mouse.
-
E.
MGCP
MGCP (Media Gateway Control Protocol) is a signaling and call control protocol used in VoIP systems to manage media gateways under the control of call agents or media gateway controllers.
- 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: Call Session Control Function Target entity description: The Call Session Control Function (CSCF) is a core IP Multimedia Subsystem (IMS) network element responsible for controlling SIP signaling, managing user sessions, and enforcing service policies in next-generation telecommunication networks.
-
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.
Policy Control Function
The Policy Control Function (PCF) is a 5G core network element that centralizes policy rules and provides unified policy control for quality of service, access, and charging decisions across the network.
-
C.
Breakout Gateway Control Function
Breakout Gateway Control Function is a core component in IP multimedia networks that selects and routes voice or multimedia sessions from an IP domain to the public switched telephone network (PSTN) or other legacy systems.
-
D.
Switch Control
Switch Control is an accessibility feature that lets users operate a computer using one or more adaptive switches instead of traditional input devices like a keyboard or mouse.
-
E.
MGCP
MGCP (Media Gateway Control Protocol) is a signaling and call control protocol used in VoIP systems to manage media gateways under the control of call agents or media gateway controllers.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
IP Multimedia Subsystem network function
ⓘ
core network element ⓘ |
| abbreviation | CSCF ⓘ |
| communicatesWith |
HSS
ⓘ
Home Subscriber Server ⓘ MRF ⓘ Media Resource Function ⓘ PCRF ⓘ Policy and Charging Rules Function ⓘ
linked to:
PCRF
application server ⓘ |
| definedBy | 3GPP ⓘ |
| domain |
mobile networks
ⓘ
telecommunications ⓘ |
| hasComponentType |
E-CSCF
ⓘ
Emergency-CSCF ⓘ
linked to:
Emergency CSCF
I-CSCF ⓘ
linked to:
I‑CSCF
Interrogating-CSCF ⓘ
linked to:
I‑CSCF
P-CSCF ⓘ
linked to:
P‑CSCF
Proxy-CSCF ⓘ
linked to:
P‑CSCF
S-CSCF ⓘ
linked to:
S‑CSCF
Serving-CSCF ⓘ
linked to:
S‑CSCF
|
| hasRole |
controls SIP signaling
ⓘ
enforces service policies ⓘ handles registration of IMS users ⓘ interacts with application servers ⓘ manages user sessions ⓘ routes SIP messages ⓘ |
| implements |
policy enforcement
ⓘ
service triggering ⓘ session control ⓘ user authentication ⓘ user authorization ⓘ |
| partOf |
IMS core network
ⓘ
IP Multimedia Subsystem ⓘ |
| standardizedIn |
3GPP TS 23.228
ⓘ
3GPP TS 24.229 ⓘ |
| supportsService |
VoLTE
ⓘ
VoWiFi ⓘ messaging services ⓘ multimedia telephony ⓘ presence services ⓘ video calling ⓘ voice over LTE ⓘ voice over WiFi ⓘ |
| usedIn |
5G networks
ⓘ
LTE networks ⓘ next-generation telecommunication networks ⓘ |
| 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: Call Session Control Function Description of subject: The Call Session Control Function (CSCF) is a core IP Multimedia Subsystem (IMS) network element responsible for controlling SIP signaling, managing user sessions, and enforcing service policies in next-generation telecommunication networks.
Referenced by (7)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Call Session Control Function
linked to: Call Session Control Function
linked to: Call Session Control Function