Cisco ASR 5000 series Product Overview page 586

▀ Network Deployments and Interfaces
SIP Interfaces
The following table provides descriptions of SIP interfaces supported by the SCM in a CDMA2000 network
deployment.
Table 80. SIP Interfaces in a CDMA Network
Interface Description
Gm The reference point between the P-CSCF and the User Equipment (UE).The Gm interface provides SIP signaling
between the PDSN and the P-CSCF.
MI The reference point between the E-CSCF and Location Retrieval Function (LRF).
The MI interface is used for routing an emergency call to a Public Safety Answering Point (PSAP). The E-CSCF
interacts with the Location Retrieval Function (LRF) to identify the next hop PSAP.
Mw The reference point between the P/S-CSCF and other CSCFs.The Mw interface provides SIP signaling between two
CSCFs.
DIAMETER Interfaces
The following table provides descriptions of DIAMETER interfaces supported by the SCM in a CDMA2000 network
deployment.
Table 81. DIAMETER Interfaces in a CDMA Network
Interface Description
Cx The reference point between the S/I-CSCF and the Home Subscriber Server (HSS).
The Cx interface is used to authenticate subscribers, provides server assignments, push user profile information from
the HSS to the S-CSCF, and, when necessary, transmit a network initiated de-registration.
Dx The reference point between the S/I-CSCF and Subscriber Location Function (SLF).
The Dx interface is used to proxy queries to a subscriber data server (such as an HSS) in which subscription data for a
user can be found. The SLF receives a query for the subscriber data server, looks up the address of appropriate
subscriber data server, and proxies the query to the appropriate subscriber data server.
Rf The reference point between the P-CSCF and the Offline Charging System (OFCS).
The Rf interface is used to transfer charging information that will not affect, in real-time, the service being rendered.
For more information, refer to the 3GPP2 specification X.S0013-007-A v1.0.
Sh The reference point between the S-CSCF and Home Subscriber Server (HSS).
The Sh interface is used for retrieval and update of call feature data parameters.
Tx The reference point between the P-CSCF/A-BG and the Charging Rule Function (CRF)/Policy Decision Point (PDP)
(PCRF) used for Service Based Bearer Control (SBBC). It identifies any P-CSCF/A-BG restrictions to be applied to the
identified packet flows.
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Session Control Manager Overview
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