Thank you for your prompt reply. I did check the volume on the phones. The volume is fine. The console is not on night mode. I do not think that they are on Do Not Disturb...I will check that now. I have already hyperlinked to the programming site. Thank you for the direction. I read up on this over the weekend and hopefully will figure out what happened by Monday. Bye the way, all of my phones used to ring for all incoming calls. Now 3 do not ring at all and 3 ring on ring delay. This has been going on for over three weeks. I've just been on the phone so much that I only noticed when the staff complained....Have a great weekend!