It could be that you CID mod for the KSU is bad, you can try by moving line one which would be on the first pair (white/blue) of the COL 66-block to the 5th position (white/slate)of the COL 66 block. This is something that might be worth paying a pro to do.
Visit Atcom to get started with your new business VoIP phone system ASAP
Turn up is quick, painless, and can often be done same day.
Let us show you how to do VoIP right, resulting in crystal clear call quality and easy-to-use features that make everyone happy!
Proudly serving Canada from coast to coast.