Emergency-Cscf - Cisco ASR 5000 series Product Overview

Hide thumbs Also See for ASR 5000 series:

Table of Contents

▀ Product Description

Perform Transit Routing Functions - The I-CSCF may need to perform transit routing if, based on the HSS

query, the destination of the session is not within the IMS. The IMS Transit Functions perform an analysis of

the destination address and determine where to route the session. The session may be routed directly to an

MGCF, BGCF, or to another IMS entity in the same network, to another IMS network, or to a CS domain or

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.

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.

E-CSCF Interfaces

The following diagram shows the interfaces/reference points associated with the E-CSCF:

The A-BG is responsible for:

Border Control for both Signaling and Bearer

Intelligent Routing

▄ Cisco ASR 5000 Series Product Overview

Session Control Manager Overview