Cisco Systems ASR 1000 manual On page 1-3illustrates the unified model

Chapter 1 Integrated Session Border Controller for the Cisco ASR 1000 Series Routers Overview

General Overview

Figure 1-2 on page 1-3illustrates the unified model.

Figure 1-2 Unified SBC Model

SBE+DBE

Domain A Domain B

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The Integrated Session Border Controller runs under the distributed model and provides the DBE functionality.

The distributed model offers advantages over the unified model, as follows:

•Scalable to a larger number of sessions.

•Operational advantages, because the SBE can be upgraded or serviced separately from the DBE.

•The distributed model aligns well with typical voice deployments where the SBE can be co-located with part of the call agent.

•The many-to-many interface offers capability to load share and balance across networks. Operators have the flexibility to optimize on loading of the SBE or DBE.

Figure 1-3 on page 1-3illustrates the distributed model.

Figure 1-3 Distributed SBC Model

SBC

SBE

Domain A	Domain B
	DBE
	Standard
	H.248
	Interface

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Cisco IOS XE Integrated Session Border Controller Configuration Guide for the Cisco ASR 1000 Series Aggregation Services Routers

OL-15421-01 1-3