After fighting with this box for a while, it has come to my attention that the 7750 is best suited for SMALL installations. 100 - 200 max based on utilization. It just doesnt have the horsepower to handle high utilization.
IE: One of my clients insisted on this box for his school system. 400 users with 9 different call handlers consisting of 8 different menu options - so Unity is currently handling c. 1500 calls per day:
Processor @ 85% sustained
Memory @ 50 - 80% usage.
Moves, Adds & Changes can not be done during business hours as the database hangs (due to high CPU util).
I suggest anyone using this box perform a SERIOUS utilization estimate prior to implementing it. when it's not overworked the 7750 is a cool box. when it is asked to do too much, it becomes a nightmare.
Having had extensive call manager (from 3.0.1) and 7750 (first production v2 7750 in the world), I would say that you're running into a low memory situation. MS SQL server likes lots of memory. The CPU utilization is probably due in part to a low memory situation that is causing the box to swap. Our production 7750 ran into the same issue when running a big CDR query. Upgrading the SPE's to 1gig (which is what our MCS based CM system runs at) cleared up the issues.
I expect the 7750 is nearing end-of-sale. I have heard that rumor from multiple sources within Cisco. I would position the 7815s as an alternative. Unfortunately, the 7750 bundles had the best price point and Cisco just can't seem to understand that the SMB market requires a cost effective solution.
Are you getting this error “Installer User Interface Mode Not Supported. The installer cannot run in this UI mode. To specify the interface mode, use the -i command-line option, followed by the UI mode identifier. The value UI mode identifiers...
The below trick might come handy when you have to add a new node to a cluster but you don't have or is unsure of the security password for the publisher. This procedure has been around for ages.
1) Login into the CLI of the Publisher.