If there is, I've never found it. It always starts on the second ring when caller ID is enabled, waiting for the caller ID information. The Caller ID info is sent between the first and second ring.

At least the phones ring. I upgraded a system to 2.22 something, and all phones stopped ringing. Tech support said that will caller ID, trunks had to DIT somewhere.

Glad you got it working. Just one more note. You can put a caller ID history button on the phones, but you have to put in max history in the Station Assignments, and the history will only show the calls that were picked up by that phone, unless you assign a line owner.