UCM - minimum BW between servers & endpoints

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May 12th, 2009
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Hi all,

I have a question related to UCM server that needs discussing from you:

What is the minimum BW (and what is the maximum delay) between the server and the endpoints.

I have such the question because we have some remote sites that connect to the central site via 128kbps links.


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ivillegas Tue, 05/19/2009 - 13:32
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The maximum one-way delay between any two Unified CM servers should not exceed 20 msec, or 40 msec round-trip time (RTT). The minimum recommended bandwidth between sites that are clustered over the WAN is 1.544 Mbps.

hoanghiep Tue, 05/19/2009 - 17:39
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Thanks for reply.

But your answers didnot solve my question! My question is "the minimum bandwidth between the CCM server(s) & the endpoints (IP Phones)).

Any other?


Jaime Valencia Tue, 05/19/2009 - 18:28
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The SRND answers all your questions,

Bandwidth Provisioning


Fully read this topics

- Provisioning for Bearer Traffic

- Provisioning for Call Control Traffic with Centralized Call Processing

- Provisioning for Call Control Traffic with Distributed Call Processing



if this helps, please rate


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