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Unity Design Question

We have a client who is currently looking to install Unity and CallManager.

They will install CallManager subscriber at their main offices and publisher at an off-site secure location (which acts as their DR Site) connected to the main office by 10Mb private circuit.

Their MS exchange server is also located at the main office.

The customer would like to locate the Unity server at the secure site - is there ant reason why this would not work considering that the traffic between CallManager and Exchange will need to pass over the link?


Re: Unity Design Question

There are few things to watch out for.

- SQL replication if you are using Failover (primary and secondary) Your SQL replication has thresholds in place. If there is delay, Unity will failover (on automatic failover) But even if you setup the thresholds to be larger, SQL still needs to have a good connection. I know in CallManager Pub/Sub, it must have 40ms or less to create a remote Sub. I'm sure Unity is roughly the same.

If you relocate your Unity offsite, keep it next an exchange server, or MWI may suffer. Remember, Unity checks the Inboxes of all subscribers. Delays in MWIs turning may upset a few people.

if you locate Unity offsite, make sure you have the QOS, Bandwidth and layer 3 since it is private 10meg connection for the voice channels. If your port utlization is at 50 percent fairly constant, with 16 ports, makes sure you have min of 8-13 "channels" available for IP phones or gateways to transfer calls to the Unity server.

Hope this helps.


Re: Unity Design Question

Hey T -

Browsing on Unity failover and found this. Good info to know.



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