Thank you for your quick responses. These are just normal copper lines. I went on site and made a bunch of test calls and I did get it to fail every time when I pressed transfer 110+7 when 110 was on a call. I've explained to them that the 7 isn't necessary if they are on the phone. Is there a way to disable the 7? I thought it was 11-16-09. I didn't get a chance to see if all mailboxes were doing this or just 110. I checked the one key dialing for 110 and it was blank.