Unity VM Design Question

[jjia]

Hi,

On Cisco Unity Design Guide it says for Cisco Voice Messaging(Exchange 2000) configuration, the Exchange 2000 can be installed on the same server as Unity or a separate server dependin on the number of subscribers that needs to be supported by Cisco Unity.

Could someone help me any link for the guide on how many number of subcribers we need install Exchange 2000 on a separate server?

Thanks,

[Hin Lee]

A bit complicated question - there are more factors than just number of subscribers.

Please review this doc:

Cisco Unity Supported Platforms List

http://www.cisco.com/en/US/products/sw/voicesw/ps2237/products_data_sheet0900aecd802132ef.html

[Salvatore Collora]

In terms of mailboxes, each Exchange server can support 4000 users. While Unity itself can handle 7500 on a single 7845 server, if you have Exchange running on the same box, it's only 4000 (because of the Exchange limitations).

If you want 7500 users, you need a single Unity server and TWO back-end, off-box Exchange message stores because each one can only handle 4000 users (7845 servers of course).

Does this help?