on Definity s87xx platform have incoming calls routed thru VDN's to hunt group. Stations are "callerID" type. Using TN793B. Do not get Caller ID. The only CID we ever get is a phone # from a cell phone that we used to test with months ago. This cell phone CID # is the only callerID that is ever displayed- even tho not the phone that is calling. It only displays 1-2 times a month out of 100's of calls. No other CID ever displays. Really stumped.