I have a busy optometrist office with an issue. The front office phones are all immediate ring. The back office are all no ring. When calls come in and the front phones are in use, the back office, the eye docs, can hear the incoming calls but they cannot distinguish between a call coming in and a call on hold by looking at the blinking LEDs. They have 18 button non display phones and apparently the incoming calls blink red rather than green. I'm not there to verify this but it sure sounds to me like you don't get a green LED unless you have ringing turned on. So they try to help out the front desk girls when they are busy but they often pick up the call on hold rather than the incoming call. They don't seem too eager to make the back phones delayed ring. Does anyone have a nift snifty solution or workaround? I ran the idea of an ASA card by them and they didn't like it.