When you open Attendant console for first time, it will ask to setup IP address of CTI manager. Key in the Callmanager address that is your primary CTI mgr (subscriber mostly) and you have a second tab where you can specify additional CTI mgr's if you have one. You will also be asked to enter the device name of the phone the attendant console user uses (SEPXXXXXXXXXXX). Once you fill this in and click OK, it will pop up with a new window that asks for the attendant console username and password. This username should match up with the Attedant Console user you setup in callmanager.
HTH
Sankar
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Sankar Nair
UC Solutions Architect
Pacific Northwest | CDW
CCIE Collaboration #17135 Emeritus