Cisco Cisco Unified Contact Center Enterprise 9.0(2) Leaflet

A tool is accessible to Cisco partners and Cisco employees for computing the bandwidth needed between 
the ICM Central Controller and the IP IVR PG. This tool is called the VRU Peripheral Gateway to ICM 
Central Controller Bandwidth Calculator, and it is available (with proper login authentication) through 
the Cisco Steps to Success Portal at 

At this time, no tool exists that specifically addresses communications between the Unified ICM Central 
Controller and the Cisco Unified Customer Voice Portal (Unified CVP) PG. Testing has shown, however, 
that the tool for calculating bandwidth needed between the Unified ICM Central Controller and the 
Unified IP IVR PG will also produce accurate measurements for Unified CVP if you perform the 
following substitution in one field:

For the field labeled Average number of RUN VRU script nodes, substitute the number of Unified 
ICM script nodes that interact with Unified CVP.

 is a worksheet to assist with computing the link and queue sizes for the private network. 

Definitions and examples follow the table.

Minimum link size in all cases is 1.5 Mbps (T1).

If one dedicated link is used between sites for private communication, add all link sizes together and use 
the Total Link Size at the bottom of 

. If separate links are used, one for Router/Logger Private 

and one for PG Private, use the first row for Router/Logger requirements and the bottom three (out of 
four) rows added together for PG Private requirements.

Router + Logger

30

 0.8

Unified CM PG

 100

 0.9

Add these three 
numbers together 
and total in the 
shaded box below 
to get the PG 
High-Priority 
Queue bandwidth.

Unified IP IVR 
PG

 60

 0.9

Unified CVP PG

 120

 0.9

Unified IP IVR 
or Unified CVP 
Variables

((Number of 
Variables 

 Average 

Variable Length) / 
40)

 0.9