I have a BCM 400(4.0) with a GATM 8 installed. I have just hooked up a analog device(vonage) to one of the trunk ports. Call are processed properly but when I dial the Line Pool code, I do not get dial tone back or hear any ringing. The only indication I get is when the other party answers. I have tried changing the short, med,long CO and PBX settings. The impedance is 600. I do get dial tone at the BIX field of the BCM with a butt-set Does anybody have any ideas. Thanks