Cisco Cisco Mobility Unified Reporting User Guide
Session Control Manager Overview
▀ Product Description
▄ Cisco ASR 5000 Series Product Overview
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Generate CDRs - The I-CSCF generates CDRs for its interactions. Upon completing a Cx query, the I-CSCF
sends an Accounting Request with the Accounting-Record-Type set to EVENT. The CDF acknowledges the
data received and creates an I-CSCF CDR.
data received and creates an I-CSCF CDR.
Emergency-CSCF
The Emergency-CSCF (E-CSCF) is a network element in IMS which is responsible for routing an emergency call to a
Public Safety Answering Point (PSAP).
To identify the next hop PSAP, E-CSCF interacts with the Location Retrieval Function (LRF). LRF provides the
necessary routing information so that E-CSCF can route the request to the appropriate PSAP.
Public Safety Answering Point (PSAP).
To identify the next hop PSAP, E-CSCF interacts with the Location Retrieval Function (LRF). LRF provides the
necessary routing information so that E-CSCF can route the request to the appropriate PSAP.
E-CSCF Interfaces
The following diagram shows the interfaces/reference points associated with the E-CSCF:
A-BG
The A-BG is responsible for:
Border Control for both Signaling and Bearer
CALEA Support
SIP and media taps
Call Admission and Access Control
Access Control based on IP, URL, SIP Identity, and Session Limits
Intelligent Routing
Least Cost, Congestion Based, Call Type, Domain Based
As a SIP ALG, supports signaling and media routing with overlapping address ranges
SIP Application-level Gateway (SIP-ALG)
SIP NAT Traversal
SIP NAT (IPv4 <–> IPv6 translation)