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Session Control Manager Overview
▀ Features and Functionality - Base Software
▄ Cisco ASR 5000 Series Session Control Manager Administration Guide
OL-22952-01
Shared Initial Filter Criteria (SiFC)
If both the HSS and the S-CSCF support this feature, subsets of iFC may be shared by several service profiles. The HSS
downloads the unique identifiers of the shared iFC sets to the S-CSCF. The S-CSCF uses a locally administered
database to map the downloaded identifiers onto the shared iFC sets.
downloads the unique identifiers of the shared iFC sets to the S-CSCF. The S-CSCF uses a locally administered
database to map the downloaded identifiers onto the shared iFC sets.
If the S-CSCF does not support this feature, the HSS will not download identifiers of shared iFC sets.
Telephony Application Server (TAS) Basic Supported
The following describe the local basic call features implemented on the S-CSCF:
Abbreviated Dialing (AD)
Call Forward Busy Line (CFBL)
Call Forward No Answer (CFNA)
Call Forward Not Registered (CFNR)
Call Forward Unconditional (CFU)
Call Transfer
Call Waiting
Caller ID Display (CID)
Caller ID Display Blocked (CIDB)
Feature Code Activation/De-activation
Follow Me/Find Me
Locally Allowed Abbreviated Dialing
Outbound Call Restrictions/Dialing Permissions
Short Code Dialing
TAS Basic provides basic voice call feature support in the SCM. In the IMS architecture, these telephony features are
normally provided by an external application server. Providing these features with the S-CSCF:
normally provided by an external application server. Providing these features with the S-CSCF:
Reduces the need for an additional SIP AS
Simplifies the network architecture
Improves latency for call setup and feature invocation
The following describe the local basic call features implemented on the S-CSCF:
Abbreviated Dialing (AD) - This feature allows the subscriber to call a Directory Number by entering less than
the usual ten digits.Usually, the subscriber has four digit dialing to mimic PBX dialing privileges but these
must be set up prior to use. When the SCM receives these numbers, it translates them and routes the call.
must be set up prior to use. When the SCM receives these numbers, it translates them and routes the call.
Call Forward Busy Line (CFBL) - This feature forwards the call if busy line indication is received from the
UE. If CFBL is enabled on both the AS and the S-CSCF, the call is forwarded by the S-CSCF on Busy Line
indication. The feature detects and eliminates call forward loops if the History-Info header is present. It also
indication. The feature detects and eliminates call forward loops if the History-Info header is present. It also