The customer has the initial requirements as follow:
1. CUCMBE 7.5 with Unity Connection at the HQ location
2. 2901 gateway with SRST in one remote site
3. Auto Attendant and Voicemail for both sites will be configured with Unity Connection
4. When WAN is down, the SRST becomes active and voicemail is available for users in the remote site
Now the customer is considering if the CUCMBE server is down, there would be no voicemail and Auto Attendant for both sites. They like to have redundant local voicemail and Auto Attendant in the remote site so that the phone service and voicemail are available in the event of either WAN or CUCMBE server outage. I am thinking to add the CUE module to the remote site. I have the following questions:
a. Is this a poasible solution?
b. The AA and voicemail with the Unity Connection should be used when WAN and server are operating properly. How should SRST be configured to kick in AA and voicemail with CUE only in the event of WAN or CUCMBE server outage?
c. A message is left in the CUE during the SRST operation mode, then the system is back online before the user listens to the message. His phone receives MWI from Unity Connection now. How can the user know there is a message waiting for him in the CUE?
Please ask me questions if I don't describe it clearly.
Thank you in advance.