Error Handling - Cisco ASR 5000 series Product Overview

▀ Features and Functionality - Base Software
Early IMS Security
Early IMS security allows authenticating the UE without IMS protocols and clients. Based on the 3GPP TR 33.978
specification, the SCM supports security inter-operation with 2G and non-IPSec user devices.
Emergency Call Support
P-CSCF gives priority to emergency calls, especially in a congested network. In addition, P-CSCF rejects new calls to
any user who is in an emergency call.

Error Handling

The SCM supports consistent management of errors in a framework that considers existing and future standards and
specifications.
Future-proof Solution
The SCM eliminates the capital and operational barriers associated with deploying traditional, server-based SIP proxies
that lack carrier-class characteristics, occupy valuable rack space, and require numerous network interfaces, while also
introducing additional control hops in the network that add call setup latency.
When operators deploy IMS/MMD, profitability will improve because a seamless on-ramp will be provided by
simultaneously supporting 3GPP/3GPP2-based standards, P-CSCF functionality, and IETF SIP standards.
Intelligent Integration
For deployed platforms, no new hardware is necessary to install or manage. Functionality is enabled with a simple
software download.
Intelligent integration lowers operational expenditure and reduces the number of network elements, network interfaces,
and call setup latency.
Interworking Function
The SCM allows non-IMS UEs (pre IMS or RFC3261-compliant UEs) to work with the IMS core. When UEs are not
IMS compliant, having this protocol interworking function at the edge allows the IMS core to be IMS compliant. After
the interworking function inserts all necessary IMS headers toward the IMs core, the call appears to the IMS core
network elements as if it is coming from an IMS-compliant UE.
▄ Cisco ASR 5000 Series Product Overview
Session Control Manager Overview
OL-22938-02