Can one CUE be used by multiple CME's?

Unanswered Question
Jun 17th, 2008

I have a customer who has an existing C2800 with CME and CUE. They are now adding another site to their network and another C2800 with CME, they wish to use the existing CUE as centralised voicemail and IVR for both CME's.

Is this possible? are there are restrictions?

Any comments would be appreciated.



I have this problem too.
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Sushil Kumar Katre Tue, 06/17/2008 - 02:36

Hi Cris,

This is what the SRND says -

"A “centralized” Cisco Unity Express model where a single Cisco Unity Express system provides voice mail to IP phones at more than one Cisco CME or Cisco SRST site."

SO what you are trying can not be achieved.

-> Sushil

Paolo Bevilacqua Tue, 06/17/2008 - 02:43

Actually it seems to me that the SRND says it can be done.

IVR can a different story as if you have lines on both siste, using a centralize system cause the call path not to be optimal.

Sushil Kumar Katre Tue, 06/17/2008 - 03:43


The statement whcih I pasted is under the Section "Unsupported Deployments".

I am currently in a Cisco's training "Integrating Unififed Communications" and crosschecked with the Instructor who says CUE can't be shared with multiple UCMs/CUEs.

-> Sushil

rob.huffman Tue, 06/17/2008 - 04:11

Hey guys,

Just thought I should throw this into the mix. I believe this restriction has been lifted with CUE 3.2;

Sushil, you are correct on the CUE references. Here is the "old" info;

Cisco Unity Express must be installed on each Cisco CME host router. Cisco Unity Express cannot provide voice-mail services across Cisco CME routers.

Here is the new info (I don't think CUE 3.2 is out quite yet - but soon I hope);

Q. What are the new features introduced with Cisco Unity Express 3.2?

A. Cisco Unity Express 3.2 introduces the following enhancements:

• Integration with multiple Cisco Unified Communications Manager Express sites: Cisco Unity Express (on NME-CUE only) can integrate with up to 10 Cisco Unified Communications Manager Express remote sites. This solution allows centralized voicemail and Automated-Attendant features for up to 10 sites when voicemail at each remote site branch is not essential and there is a small number of users at each site.

Q. Which releases of Cisco Unified Communications Manager Express will be supported with Cisco Unity Express Release 3.2?

A. Cisco Unity Express **will be supported with Cisco Unified Communications Manager Express Releases 4.0, 4.1, 4.2, and 4.3.

Cisco Unity Express Release Notes

Hope this helps!


rob.huffman Tue, 06/17/2008 - 04:40

Hi Sushil,

You are most welcome my friend :) This seems like a nice change for CME/CUE deployments.

Take care,


ccpagel Tue, 06/17/2008 - 04:45

Thanks everyone for your excellent input and quick response.


Paolo Bevilacqua Tue, 06/17/2008 - 06:48


I did not noticed under which section the paragraph was quoted from.

Have to say that I haven't tried myself, but I see no reason why when configured properly, a CUE can't serve mailboxes to remote users. The way it works, CUE should not distinguish about from which address the request comes in. Of course I can be wrong...

Also note CUE 3.2 is not out yet despite the documentation is released already.


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