Our High-Performing Core Network

Fully virtualizable on VMware, K8S, Docker and OpenStack containers

Interrogating - Call Session Control Function(I-CSCF)

The I-CSCF serves as the routing and querying component in the IMS core network. It operates at the network boundary, handling incoming SIP requests, routing them to the appropriate S-CSCF, and interfacing with the HSS to retrieve user profile data. It is essential for roaming support and network topology concealment.

Features

Routes initial SIP requests to the designated S-CSCF

Handles incoming signaling from external networks

Interfaces with HSS to obtain user S-CSCF assignment (via DIAMETER)

Supports roaming user location and session control

Hides internal network topology for security purposes

Performs SIP filtering and policy routing decisions

Related Products

Meet IPLOOK at MWC Asia 2026 ×