Thanks for your help, everybody. The manual that came with the phone explains a trunk to trunk patch and specifies the systems it covers which doesn't include ours. However, the conference call description says we can make conference calls with up to four participants, two of whom may be on outside lines. When the procedure is followed as we've discussed it doesn't work. I'm going to give up at this point regarding this BB but will try one more option. When a client calls into the FL office, my assistant will call them back, press conf, then call me press conf and then we'll see if my assistant making both outgoing calls is any different than one incoming call from the client and one outgoing to me. I won't hold my breath. Thanks again everybody.