Cisco Cisco Customer Voice Portal 8.0(1) Design Guide

Cisco 2800 Series

Cisco 3800 Series

Cisco AS5300

Cisco 2900 Series

 

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Cisco 3900 Series

 

The Cisco Unified Border Element (formerly known as the Cisco Multiservice IP-to-IP Gateway) is a 
session border controller (SBC) that provides connectivity between IP voice networks using H.323 or 
SIP. Unified CVP supports Cisco Unified Border Element starting with Unified CVP 4.1. Cisco Unified 
Border Element is supported in flow-through mode only, so that all calls are routed through the Cisco 
Unified Border Element. 

Unlike flow-through mode, with flow-around mode, customers lose the ability to do DTMF 
interworking, transcoding, and other key functions such as tcl and media capabilities that flow-through 
will otherwise allow.

A Unified Border Element is typically needed when replacing a TDM voice circuit with an IP voice 
trunk, such as a SIP trunk, from a telephone company. The Cisco Unified Border Element serves as a 
feature-rich demarcation point for connecting enterprises to service providers over IP voice trunks.

The Cisco Unified Border Element has been tested with, and can be used in, any of the following 
scenarios:

SIP-to-SIP connectivity between a third-party SIP device and Cisco Unified CVP

SIP-to-SIP connectivity between Cisco Unified Communications Manager and Cisco Unified CVP

Co-residency of the VoiceXML Gateway and the Cisco Unified Border Element for any of the above 
scenarios

 

For CUBE session numbers, refer to:

 

Transcoding between G.711 and G.729

For more information about using the Cisco Unified Border Element with Unified CVP, including 
topologies and configurations, refer to the document Cisco Unified Border Element for Contact Center 
Solutions, available at 

Due to a limitation in Cisco IOS, the Cisco Unified Border Element does not support mid-call escalation 
or de-escalation from audio to video, and vice versa.