Cisco Cisco Unified Customer Voice Portal 10.5(1)
A round trip of a VoiceXML document between Unified CVP and the gateway consumes an
average of 7 KB (7,000 bytes). If each call includes approximately 20 VoiceXML documents,
the WAN bandwidth consumed by VoiceXML documents can be calculated as follows:
average of 7 KB (7,000 bytes). If each call includes approximately 20 VoiceXML documents,
the WAN bandwidth consumed by VoiceXML documents can be calculated as follows:
1. 7,000 bytes * 20 VoiceXML documents * 8 bits = 1,120,000 bits per call
2. 0.166 CPS * 1,120,000 bits per call = 185.9 Kbps per remote site
Prompt Retrieval
Voice prompts can be stored in the following locations:
•
In flash memory on each local site gateway—In this way, gateways do not need to retrieve
.wav files for prompts and WAN bandwidth is not affected. However, if a prompt needs to
change, you must change it on every gateway.
.wav files for prompts and WAN bandwidth is not affected. However, if a prompt needs to
change, you must change it on every gateway.
•
On an HTTP media server—In this way, each local site gateway (if properly configured) can
cache many or all prompts, depending on the number and size of the prompts.
cache many or all prompts, depending on the number and size of the prompts.
When prompts are stored on an HTTP media server, the refresh period for the prompts is defined
on that server. The bandwidth consumed by prompts consists of the initial loading of the prompts
at each gateway and of the periodic updates at the expiration of the refresh interval.
on that server. The bandwidth consumed by prompts consists of the initial loading of the prompts
at each gateway and of the periodic updates at the expiration of the refresh interval.
As an example of determining the bandwidth consumed by prompts, assume that a call flow
has 50 prompts with an average size of 50 KB (50,000 bytes) each. Also, assume that the refresh
period for the prompts is defined as 15 minutes (900 seconds) on the HTTP media server.
has 50 prompts with an average size of 50 KB (50,000 bytes) each. Also, assume that the refresh
period for the prompts is defined as 15 minutes (900 seconds) on the HTTP media server.
The WAN bandwidth required for prompts in this call flow can be calculated as follows:
1. 50 prompts * 50,000 bytes * 8 bits = 20,000,000 bits
2. 20,000,000 bits / 900 seconds = 22.2 Kbps per branch
H.323 Signaling Bandwidth
Each call that a local site gateway processes requires approximately 6,000 bytes, plus
approximately 1,000 bytes each time the call is transferred to an agent. Thus, each call requires:
approximately 1,000 bytes each time the call is transferred to an agent. Thus, each call requires:
7,000 bytes * 8 bits = 56,000 bits per call
The bandwidth required for the WAN link to a remote branch can be calculated as follows:
0.166 CPS * 56,000 bits per call = 9.3 Kbps for the WAN link to a remote branch
Configuration and Administration Guide for Cisco Unified Customer Voice Portal Release 4.1(1)
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Chapter 13: - Transferring and Queuing Calls with Unified CVP
Configuring Locations-Based Call Admission Control